Maytag Neptune Manule Service

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© 1998 Maytag Corporation

16008373-01 SECTION 1. GENERAL INFORMATION 1-1

SECTION 1. GENERAL INFORMATION

PRE-INSTALLATIONREQUIREMENTS

NOTE: Proper i nst all at ion is the responsibi l- it y of t he purchaser.

Checkpoints for proper installation:

• Properly grounded electrical outlet is re-quired. Use 15 amp fuse or compatiblecircuit breaker for electrical service.

• Standpipe Drain System must accept 1½"O.D. drain hose. Standpipe height of 36"is recommended.

NOTE: If dr ain standpipe is in excess of 5 f eet above f loor l evel, inst all pump accessory ki t ,part number 22002136.

• This unit is not equipped with a siphonbreak, and the drain hose must be elevatedto a minimum height of 24". A 36" highstandpipe is recommended. For all instal-lations the drain hose must be supportedby the drain hose strap on the back of thewasher.

• Hot and Cold water faucets must be withinfour (4) feet of the back of the washer. Thisallows quick access for immediate watershut off.

• Water heater should be set to deliver aminimum of 120ºF (49º C) hot water to thewasher.

• Do not store or operate washer in tem-peratures below freezing. This can causedamage to the pump, hoses and othercomponents.

• Water pressure of 20 - 120 P.S.I. is requiredto fill the washer in the appropriate timeframe. Pressures of less than 20 P.S.I. may

cause an extended fill time. Refer to thetroubleshooting section for more infor-mation regarding a solution for slow fillsituations.

• Best performance is obtained with thewasher installed on a solid floor. Woodfloor constructions may need to be rein-forced to minimize vibration from unbal-anced load situations. Carpets and softtile surfaces are also contributing factorsto vibration and/or movement during thespin cycle. Never install washer on a plat-form or weak support structure.

UNCRATING INSTRUCTIONS

NOTE: The fol lowi ng st eps must be per - f ormed in the corr ect order t o ease uncrat ing.

1. Remove the carton by cutting only inmarked areas of the carton. CAUTION:Hoses are connect ed t o t he washer.

2. Carefully remove any packaging materi-als from the outside of the washer.IMPORTANT: DO NOT cut t he red st raps securi ng t he power cord and inlet hoses at this time. They will be removed laterduring installation.

3. Remove the accessory package from in-side the tub.

4. Remove the crate bottom from the washerby removing crate bottom wire clips.




16008373-01 SECTION 1. GENERAL INFORMATION 1 -2

INSTALLATION

1. Two separate red shipping straps are usedto secure the machine for shipping pur-poses and to secure the power cord withthe water inlet hoses. Remove the strapsin the following sequence:

A. Locate the metal buckles securing the redstraps which extend through slots in therear wall of the cabinet. The buckles arepositioned in the center of the red straps.Carefully cut the red straps, and removethe metal buckles. NOTE: Cut t he st raps as close to t he buckles as possibl e. Dis-card the buckles.

B. Grasp each loose strap individually andpull the strap to remove it from the cabi-

net. Discard the strap (Figure 1-2).

2. Tip washer slightly forward. Loosen rearleveling leg lock nuts. Tip washer backslightly to loosen front leveling leg locknuts (Figure 1-3).

3. Locate the two (2) ½" hex head shippingbolts extending up through the bottom of the base (Figure 1-4) . The shipping boltsare near the center of the base toward thefront of the washer. Remove both bolts,freeing the tub and suspension. Do notbe alarmed should the tub assembly shiftwhen the last bolt is removed. Some shift-ing of the tub is normal.

Figure 1-2

Figure 1-3

Figure 1-1





4. Slide the washer into position and checkthe levelness and stability of the washer.If necessary, slide the washer out of posi-tion to either raise or lower the levelingleg as required to level and stabilize thewasher securely on all four legs. Slide thewasher back into position to confirm lev-elness to the floor. When the washer islevel, tighten the locking nuts up againstthe base of the washer. This will securethe leveling legs in place.

5. Install the rubber feet, found in the instal-

lation package, on all four (4) legs (Figure 1-3 ).

6. Pull the drain hose vertically to the drainstrap . Then route the drain hose throughthe drain hose strap on the back of thewasher and snap into the plastic hook of the strap.

7. Install gooseneck end of drain hose intodrain standpipe. Be sure the connection

is not airtight between the drain hose andstandpipe. Standpipe must be at least 24"high. 36" height is recommended.

8. Connect inlet hoses to water supply us-ing screen washers (found in the installa-tion package) at faucet connections, withthe domed screen facing the faucet. At-tach hoses to the faucets and the watervalve.

Figure 1-4

GROUNDING POLARITY CHECKS

The receptacle used for all Maytag productsoperating on 120 Volts AC must be properlygrounded and polarized.

The power cord should be equipped with athree (3) PRONG POLARIZED GROUNDINGPLUG FOR PROTECTION AGAINST SHOCKHAZARD and should be plugged directly intoa properly grounded and polarized receptacle.CAUTION: Do not cut or remove t he grounding prong fr om t his plug.

It is the responsibility of the person installingthe appliance to ensure it is adequatelygrounded and polarized at the point of instal-lation. Local conditions and requirementsshould be taken into consideration. In caseswhere only a two (2) prong receptacle is avail-able, it is the personal responsibility of thecustomer to have it replaced with a properlygrounded and polarized three (3) prong recep-tacle (Figure 1-6).

Figure 1-5

Turn on the water and check for leaks (Figure 1-5) . Not e the H and C designat ions on the water valve bracket for the Hot and Cold hoses.

NOTE: Accessory inlet hoses are avail able in var ious lengt hs, up t o 10 f eet .





Figure 1-6

SPECIFICATIONS

Plug power cord into a properly grounded 120volt AC-approved electrical service. Thismust be protected by a dedicated 15 amp fuseor circuit breaker.

All grounding and wiring should be performedin accordance with national and local codes.USE OF ADAPTERS IS NOT RECOMMENDED.

CAPACITY 3.1 Cubic Feet

ELECTRICAL 120 volts, 60 Hz; Requir es 15 amp circuit br eaker or f used electricalsupply. Power cord must be connected to a properly grounded andpolarized outlet.

MOTOR Switched Reluctance Motor controlled by a micropro cessor motor control board. Motor pulley ratio (motor to spinner RPM ) 14 to 1.

POWER USAGE Motor Input: During Wash Tumble - 150 WattsDu rin g Ri nse Tu m bl e - 17 5 Watt sTop Spin - 800 Watts

(Wattage readings taken with no clothes in spinner.)

TUMBLER SPEED Wash Tumble 47-51 RPMRinse Tum ble 47-51 RPMHig h Sp eed Sp in 80 0 RPM (± 50 RPM b ased up on op tim um

spin perfo rmance.)

WATER USAGE Water p ressure should be 20-120 p .s.i. (1.06-8.44 kg/cm ) at inlet hoseconnection . Total water usage is app roxima tely 25 gallons; varies w ithclot hes load. Water fill in the spin basket with no clo thes, m easurednear the rear seam of the spin b asket.WASH LEVEL 3-4 i nchesRINSE LEVEL 4-5 inches

HOSE LENGTHS Four-foot inlet h oses with inlet washers and attaches to w ater valve.Drain hose attaches to pump a nd w ill accomm od ate 36" dr ain standpipe.

DIMENSIONS Cabinet dimensi ons: 27" (68.58cm) W x 2 7 ½” (69.85cm) D x 36"

(91.44cm)H.

WEIGHT (Approx.) Un car to ned 19 0lb . (86 kg .) Ap pro x .Crated 200lb. (91kg). Approx .

SCREW & BOLT TORQUES Bolt, Counter Weight 7in. lbs. (± 3in.lbs)Bolt , Spin Pulley 30in. lbs (± 3in. lbs)Bolt , Belt Adjuster 90in. lbs (± 10in. lbs)Screw , Front Baffle 25in. lbs (± 3in. lbs)Screw , Rear Baffle 18.5in. lbs (± 3in. lbs)Clamp, Hoses 15+ in. lbsNuts, Spinner Support 18in. lbs (± 3in. lbs)Nuts, Suspension Struts 7in. lbs (± 3in. lbs)

CAPACITY 3.1 Cubic Feet

ELECTRICAL 120 volts, 60 Hz; Requir es 15 amp circuit br eaker or f used electricalsupply. Power cord must be connected to a properly grounded andpolarized outlet.

MOTOR Switched Reluctance Motor controlled by a micropro cessor motor control board. Motor pulley ratio (motor to spinner RPM ) 14 to 1.

POWER USAGE Motor Input: During Wash Tumble - 150 WattsDu rin g Ri nse Tu m bl e - 17 5 Watt sTop Spin - 800 Watts

(Wattage readings taken with no clothes in spinner.)

TUMBLER SPEED Wash Tumble 47-51 RPMRinse Tum ble 47-51 RPMHig h Sp eed Sp in 80 0 RPM (± 50 RPM b ased up on op tim um

spin perfo rmance.)

WATER USAGE Water p ressure should be 20-120 p .s.i. (1.06-8.44 kg/cm ) at inlet hoseconnection . Total water usage is app roxima tely 25 gallons; varies w ithclot hes load. Water fill in the spin basket with no clo thes, m easurednear the rear seam of the spin b asket.WASH LEVEL 3-4 i nchesRINSE LEVEL 4-5 inches

HOSE LENGTHS Four-foot inlet h oses with inlet washers and attaches to w ater valve.Drain hose attaches to pump a nd w ill accomm od ate 36" dr ain standpipe.

DIMENSIONS Cabinet dimensi ons: 27" (68.58cm) W x 2 7 ½” (69.85cm) D x 36"

(91.44cm)H.

WEIGHT (Approx.) Un car to ned 19 0lb . (86 kg .) Ap pro x .Crated 200lb. (91kg). Approx .

SCREW & BOLT TORQUES Bolt, Counter Weight 7in. lbs. (± 3in.lbs)Bolt , Spin Pulley 30in. lbs (± 3in. lbs)Bolt , Belt Adjuster 90in. lbs (± 10in. lbs)Screw , Front Baffle 25in. lbs (± 3in. lbs)Screw , Rear Baffle 18.5in. lbs (± 3in. lbs)Clamp, Hoses 15+ in. lbsNuts, Spinner Support 18in. lbs (± 3in. lbs)Nuts, Suspension Struts 7in. lbs (± 3in. lbs)





WASHER CONTROLS

The control system in the Neptune horizontal axis washer generally consists of a timer andmicroprocessor-based machine control. These receive input signals and send output signals toother equipment in the washer, including the motor and motor control, user input switches,user indicator lights, the door latch and lock assembly, water valves, drain pump, unbalance

switches, dispenser actuator wax motors, a pressure switch, and a tub light.

The machine control has direct control of these items:

- Motor speed and direction, through signals to the motor control.- Door lock wax motor.- Hot and cold water valves, with an input signal from the timer and pressure switch.- Timer motor.- On Light.

In general, the timer dial is rotated to a desired setting, selects the cycles options using theoption switches, and starts the washer. The machine control reads the inputs from the timer,option switches and pressure switch then send output signals to the motor control and othercomponents based upon those inputs. When the machine control has completed its set of instructions for the specific timer setting, it energizes the timer motor output to advance thetimer to the next increment, reads a new set of input signals from the timer, and acts uponthem. This continues until the cycle is complete. (See Figure 1-7 & 1-8 f or a gener ic repr esent a- t ion of t he Neptune washer cont rol syst em.)

Figure 1-7

Prior To Series 17





INPUT DEFINITIONS

DOOR LOCK SWITCH INPUTWhen input is present, this is indication thewasher door is locked. The machine control-ler will not command the spinner to spin fasterthan 50 rpm when the input is not presentprior to spin.

END-OF-CYCLE SIGNAL INPUTThe End-of-Cycle Signal Input is energizedthrough a user input switch on the controlpanel. When this is energized and the cyclehas finished, the machine control will soundthe End-of-Cycle signal (See End-Of -Cycle Sig- nal Output).

FABRIC SELECTION INPUTSThe Fabric Selection Inputs are energizedthrough a user input switch on the controlpanel. The machine control reads these in-

puts to determine which cycles should be runwhen the washer is started.

MAX EXTRACT INPUTThe Max Extract Input is energized through auser input switch on the control panel. Wheninput is energized, the machine control willmodify the final spin profile to the max ex-tract profile.

NOTE: If t he user select s t he Hand Washables f abri c selecti on, al l spins wil l f ollow t he Max Ext ract pr ofi le regardless of whether t he user select s t he Max Ext ract opt ion.

OUT-OF-BALANCE INPUTThe Out-of-Balance Input Signal is providedby three normally-closed switches wired insequence. If any of these switches opens dueto an out-of-balance condition, the signal willbe momentarily lost (See Unbal ance Cont rol

Syst em).

PRESSURE SWITCH INPUTThe input signal from the Pressure Switchserves two purposes. It supplies power forthe water valves and provides an indicationto the machine control as to whether the com-manded water level has been reached.

When the timer advances into a cycle se-quence that calls for water, power is supplied

through the timer to either the wash or rinselevel contacts on the pressure switch. Whenthe water level in the tub is below the full levelfor that setting, the pressure switch circuit isclosed, supplying power for the water valvesto the machine control. When the water levelswitch is satisfied, the pressure switch circuitis opened and power for the water valves isno longer passed to the machine control. The

Figure 1-8

Series 17 & Later





When the washer is at the "full" level and thetimer is set in a Prewash Tumble, Main WashTumble, Light Wash Tumble, or Rinse Tumbleincrement, the machine control will begin thesequence timing defined for each cycle andfabric selection setting (See Cycle Sequence Definitions).

During the drain and spin increments after themain wash, first rinse, second rinse, and ex-tra rinse increments, the wash side circuit inthe pressure switch is closed. When the wa-ter level drains below the wash full level, thecircuit will close and energize the pressureswitch input. The machine control interpretsthis signal (not to energize the water valveoutputs) to measure how quickly the washeris draining. If the machine control commandsa spin speed above 51 rpm before the pres-sure switch input is energized, it will drop thespeed to 0 rpm and hold there until the pres-sure switch input is energized. An additionaldelay equal to the length of time elapsed willoccur before the pressure switch input is en-ergized. If four minutes elapse without thepressure switch input being energized, themachine control will energize the timer mo-tor output to advance the timer into the nextincrement and continue with the cycle.

START/STOP INPUTThe start/stop input is energized by the mo-mentary Push-to-Start/Stop Switch. If this in-put is energized when a cycle is in progress,the machine control will disengage the linerelay, both water valve output signals, the doorlock wax motor signal, the timer motor out-put signal, and the on-light output signal. If this input is energized when a cycle is not inprogress, the machine control will energizethe line relay and begin the cycle sequence asdefined by the timer and user input switches(See Push-To-St ar t /Line Relay Operat ion).

TACH INPUTThe tach input is a feedback signal from themotor control. It provides eight pulses perrevolution of the switched reluctance motor.The motor runs at 14 times the speed of thespinner (14:1 belt ratio). The tach input is usedfor monitoring speed and out-of-balance de-tection (See Tachomet er Ci rcuit Diagnost ics).

If the machine control commands a motorspeed and direction but does not sense a tachinput signal within five seconds, it will disen-gage the line relay to stop the washer. Thisgenerally indicates a locked rotor or a mal-function in the motor control.

If the machine control senses a tach input sig-

nal when it is not commanding the motor torun, it will disengage the line relay to stop thewasher.

If the machine control commands a coastdown from final spin speed but is still receiv-ing a tach input signal after two minutes, itwill disengage the line relay to stop the washer.

TEMPERATURE SENSOR INPUTA thermistor is located in the water valve to

monitor the blended incoming water tempera-ture. The machine control uses this input sig-nal to regulate the water temperature with thewarm or cold wash or warm rinse tempera-ture selections (See Wat er Valve Out put s).

TIMER INPUTSThe Timer Input signals are energized throughthe cams in the timer. The timer operates witha 30 second drive cycle and a 5.8 second ad-vance time (See Timer Input Chart s).

WATER TEMPERATURE INPUTSThe Water Temperature inputs are two sepa-rate signals defined by a user input switch onthe control panel. The machine control inter-prets these signals to determine what the wa-ter temperature should be for each fill (See Wat er Valve Output s).

machine control interprets this loss of poweras an indication that the water level hasreached the full level.





OUTPUT DEFINITIONS

DOOR LOCKED LIGHT OUTPUT

NOTE: This sect ion applies only t o washers bet ween Seri es 10 and 16. The "Door Locked" l ight s on washers f rom Seri es 17 and af t er ar e cont r oll ed by a "Door Locked" li ght swi t ch.

The Door Locked Light Output signal powersa 1/3 watt neon indicator lamp on the controlpanel. This output is first energized when theDoor Lock Wax Motor Output is energized. Atthe end of the cycle, it remains energized for50 seconds after the Door Lock Switch Inputshuts down. This delay allows the wax motorto fully retract and unlock the door.

NOTE: The washer will continue to tumble at t he end of cycle unti l t his 50 second delay is elapsed.

DOOR LOCK WAX MOTOR OUTPUTThe Door Lock Wax Motor Output signal pow-ers a wax motor in the door lock assembly.The wax motor extends to drive the door locksystem for the washer.

If the washer is started with the timer set in aPrewash Tumble, Main Wash Tumble, or LightWash Tumble increment, the machine controlwill wait for three minutes before energizingthe Door Lock Wax Motor Output. This delayis not affected by water level. This output re-mains energized until the end of the cycle.

If the washer is started with the timer set in aPrewash Drain, Bleach Dispense, Spin1, Rinse

Tumble, Spin2, or Spin3 increment, the ma-chine control will energize this output imme-diately.

The machine control will continuously ener-gize the Door Lock Wax Motor Output duringthe final (Spin 3) sequence until 30 secondsbefore the washer begins to coast from thefinal speed.

END-OF-CYCLE SIGNAL OUTPUTThe End-Of-Cycle Signal Output is an inter-nal signal on the machine control between themicroprocessor and annunciator. The end-of-cycle signal sounds when a wash cycle is fin-ished and the End-Of-Cycle Input is energized.The end-of-cycle signal sounds as six pulsesin a 0.35 seconds on, 0.15 seconds off pattern(See Timer Input Chart s).

ON LIGHT OUTPUT

NOTE: This sect ion appli es only t o washers f rom Seri es 17 and af t er. The "Door Locked" l ights on washers bet ween Series 10 and 16 are cont roll ed by a cam on t he t imer.

The Door Locked Light Output signal powersa 1/3 watt neon indicator lamp on the controlpanel. This output is energized when thewasher is operating in a wash or spin cycle.Note that the "On" light is not illuminated whenthe timer is in a delay increment.

TIMER MOTOR OUTPUTThe machine control energizes the TimerMotor Output to allow for variable-lengthtimer increments. If the washer is started withthe timer set in a Prewash Tumble, Main WashTumble, Light Wash Tumble, or Rinse Tumbleincrement, the machine control will not be-gin the cycle sequence timing until the waterlevel reaches the appropriate level. The TimerMotor Output is disengaged during this time.

The machine control will stop the washer bydisengaging the line relay if the following oc-cur: 1) The machine control energizes thetimer motor until it senses a timer change. 2)

The timer motor remains energized for fiveminutes while the timer inputs change (See Ti mer Input Chart s).





The machine control counts the number of rinses during a normal wash cycle. In the firstand second Rinse Tumble increments, themachine control will energize the Timer Mo-tor Output as soon as the Pressure Switch In-put is no longer energized, indicating that thewater has reached the full level. In the thirdand fourth (if Extra Rinse is selected) RinseTumble increments, the machine control willenergize the Timer Motor Output 30 secondsafter the Pressure Switch Input is no longerasserted.

The machine control will energize the TimerMotor Output when the timer is set into aSpin1, Spin2, or Spin3 increment 30 secondsbefore the end of the spin. It will remain ener-gized until the timer inputs change.

TORQUE OUTPUTThe machine control commands motor speedand direction through the Torque Output fromthe machine control to the motor control.This output is a pulse width modulated (PWM)signal (See Sect ion 2: Machine Cont rol).

Vcc REFERENCE VOLTAGE OUTPUTThe Vcc Outputs are a reference voltage for

many of the signal outputs. On the machinecontrol, the Vcc outputs are 24 VDC refer-enced to the 120 VAC neutral line.

WATER VALVE OUTPUTSThe machine control determines whether thehot or cold Water Valve Outputs should be en-ergized during each timer increment, but itonly gates the power to the water valves, itdoes not directly provide that power. Whenthe timer is in an increment calling for water,

power passes from the timer to the wash orrinse level circuit in the pressure switch. Whenthe water level is below the full level, the pres-sure switch circuit is closed and the powerpasses to the machine control. The machinecontrol gates the power to the hot and coldWater Valve Outputs. When the pressureswitch senses that the full level is reached, the

circuit opens and de-energizes the PressureSwitch Input on the machine control, whichde-energizes the Water Valve Outputs.

The machine control will read the Water Tem-perature Sensor Input to determine theblended water temperature passing throughthe water valve. In a warm wash fill, the ma-chine control will first energize both the hotand cold Water Valve Outputs for five secondsthen de-energize the cold Water Valve Outputand monitor the water temperature. Whenthe Water Temperature Sensor Input passesthe warm threshold (approx. 20 K Ohms), themachine control will re-energize the cold out-put for the remainder of the fill.

In a cold wash fill, the machine control willfirst energize only the cold Water Valve Out-put for five seconds. It then energizes the hotWater Valve Output and monitors the WaterTemperature Sensor Input until it passes thecold threshold (approx. 44 K Ohms), when itde-energizes the Hot Water Valve Output forthe remainder of the fill.

If the user selects a warm rinse temperature,the machine control will count the rinses andallow a warm rinse fill only on the third andfourth (if the user also selects the Extra Rinseoption) rinses. The first two rinses will be coldonly. The machine control does not regulatewater temperature during the rinses.

NOTE: If t he user chooses t he Easy Car e/ Perm Press f abri c select ion, al l r inse fi ll s wi ll be cold r egar dless of whether t he user al so select ed the warm ri nse temperat ure.





CYCLE SEQUENCE DEFINITIONS

NOTE: Refer t o Sect ion 2: Ti mer Input Chart s for information on the timing of each cycle sequence.

BLEACH DISPENSEIn a Bleach Dispense increment, the machinecontrol will follow the same tumble patternand speed as in a Main Wash Tumble incre-ment.

D E L AYDuring a Delay increment, the door Lock WaxMotor Output, Door Locked Light Output (Se-ries 17 and later only), Motor Torque Output,"On" light (Series 10 to 16 only), and WaterValve Outputs are de-energized. Note that theDelay indicator is energized through a camon the timer.

EXTRA RINSEWhen the user selects the Extra Rinse option,the spin increment following the third rinsewill follow the Spin2 cycle sequence. TheTimer Motor Output will be energized 60 sec-onds prior to the end of the spin cycle se-quence and will remain energized to advancethe timer through the "Off" increment into theRinse Tumble increment.

If the Extra Rinse option is not selected, thisspin will follow the Spin3 cycle sequence andthe Timer Motor Output will be energized 30seconds prior to the end of the final spin.

IDLEThe Idle increment follows the final spin in-crement in each cycle. If the Door Lock SwitchInput is energized when the timer advancesinto the Idle increment at the end of the cycle,the machine control will tumble the washeruntil 50 seconds after the Door Lock Switchinput is no longer energized. This allows timefor the Door Lock Wax Motor to fully retract.At this time, the Door Lock Light Output(washers between Series 10 and 16 only) orthe "On" Light Output (Series 17 and later

washers only) will de-energize and the End-of-Cycle Signal will sound if the user had se-lected the End-of-Cycle Signal option.

LIGHT WASH TUMBLE, MAIN WASHTUMBLE, and RINSE TUMBLEThe machine control will tumble the washerat the pattern and speed defined by the FabricSelection Inputs (See Cycle Review). Eachtumble will start only after the previoustumble has completely stopped. The machinecontrol will reverse the tumble direction aftereach pause. The machine control will con-tinue to tumble the washer until the timer in-puts change.

In a Light Wash Tumble or Main Wash Tumbleincrement, the machine control will de-ener-gize the line relay if the washer continues totumble for 29 minutes. This would only oc-cur if the timer were to stall (See Sect ion 1: Ti mer Mot or Output and Sect ion 2: Ti mer Input Chart ).

PREWASH DRAINDuring a prewash drain increment, the washerwill tumble at the same speed and in the samepattern as in the Prewash Tumble incrementfor the fabric selection. The Door Lock WaxMotor Output will be energized during thisincrement (See Prewash Tumble).

PREWASH TUMBLEWhen the timer is set into a Prewash Tumbleincrement, the machine control will tumbleat 51 rpm in the following tumble pattern:

Cycle Tumble-Pause PatternCotton/Sturdy 6 sec. - 24 sec.

Easy Care/Perm Press 6 sec. - 24 sec.Delicates 6 sec. - 24 sec.Hand Washables 3 sec. - 27 sec.





M I S C E L L A N E O U S

Door Latch Switch Monitoring

At the end of a cycle, when the timer advancesinto the Idle increment, the machine controlwill keep the line relay energized until it losespower when the door latch switch opens. This

guards against the switch contacts weldingclosed. In this condition, the machine con-trol will limit what additional cycles can be runbefore the door is opened as follows:

Washers between Series 10 and 16The machine control will allow the washerto restart only if the user sets the timerinto a Rinse Tumble or Spin3 increment.

Washers from Series 17 and LaterThe machine control will allow the washerto restart in any setting. After that cyclecompletes, the user must open the doorbefore the machine control will allow athird cycle to start.

Door Lock/Spin Control

When the machine control begins a spin in-crement, it will not command spin speedabove 51 rpm unless the door lock switch in-put is energized. At the start of a spin incre-ment, the machine control will drop the speedto 0 rpm then tumble until the switch is ener-gized. At that point, it will restart the spin se-quence. If the door lock switch is not ener-gized after 2 minutes of tumbling, the machine

control will energize the timer motor outputuntil the timer inputs change so the washercan proceed with the cycle.

At the end of spin sequence, if the door lockswitch input is de-energized before the washerdrops below 91 rpm, a hardware circuit on themachine control will interrupt the torque out-put signal, which forces the motor control to0 rpm, and energize the door lock wax motorcircuit to lock the door. This hardware circuitwill keep the door lock wax motor circuit en-ergized until the door lock switch input signalis energized.

Redistribution

The machine control commands a distribu-tion profile speed ramp from 0 rpm to 85 rpmat the beginning of each high speed (above100 rpm) spin. When the washer reaches 85rpm, the machine control monitors the TachInput to determine if the speed varies throughone revolution of the spinner basket. If itsenses a high enough variation in speed (sug-gesting an out-of-balance condition in theclothing load), it will drop the spinner speedto 0 rpm and force a short reverse tumble toredistribute the clothing load before resum-ing the spin. If any of the out-of-balanceswitches trip and open the out-of-balance in-put circuit at a speed below 500 rpm, the ma-chine control will also drop the speed to 0 rpmand force the reverse tumble to redistributethe clothing load.

In a Prewash Tumble increment, the machinecontrol will de-energize the line relay if thewasher continues to tumble for 15 minutes.This would only occur if the timer were to stall(See Sect ion 1: T imer Mot or Out put and Sec- t ion 2: Ti mer Input Chart ).





The following rules determine the maximumnumber of redistribution attempts that will beallowed in each spin step before the machinecontrol skips the step and continues with thespin profile (See Sect ion 2: Unbalance Con- t rol System).

STOPPING THE WASHER

1. With the washer running, power issupplied to the machine control andwasher from gray wire no. 26 through theline relay.

2. When the user presses the push-to-startbutton, a signal is sent to the machine con-trol through red wire no. 28 telling thewasher to shut down.

3. The machine control opens the internallogic switch which de-energizes the linerelay.

4. When the user releases the push-to-startbutton, power is removed from the ma-chine control and washer (Black wire no.27).

STARTING THE WASHER

1. With the door closed, press the push-tostart switch.

2. The red no. 28 wire sends a signal to themachine control to start running.

3. 120 VAC is supplied to the machine con-

trol board through black wire no. 27.4. The machine control closes an internal

switch to energize the line relay.5. When the push-to-start button is released,

power remains supplied to the machinecontrol and the washer from gray wireno. 26 through the line relay.

Push-To-Start Relay Operation

PUSH TO START SWITCH

LINERELAY

MACHINE CONTROL BOARD

120 VAC POWERFROM MACHINECONTROL BOARD

INTERNAL LOGICSWITCH

120 VAC LINE(When door is

closed)

GY 26 BK 27

RD 28

120 VAC LineTo Timer &Motor Control Board

NO CO M

Figure 1-8





CYCLE REVIEW

Main Wash Time/Total Cycle Time - Minutes (See Notes).

Notes:1. The main wash times listed include 2 minutes of bleach fill and tumble time.

2. The total cycle times are approximate and will vary based on water fill times, due to types of clothing loads, available water pressure and the time for the door lock system to retract atthe end of the cycle.

3. The main wash time is affected significantly if the machine control detects an excessiveamount of suds. The washer will go into a suds reduction routine, consisting of a series of additional rinse and partial drain cycles to reduce the suds present (See Troubleshoot ing &Diagnosis - Clot hes Wet at End of Spi n ).

Tumble Pattern - Number of seconds tumbling/Number of seconds of pause between tumbles.

N o n- M axEx t ra c t C o t t o n / S t u rd y

E a sy C a r e /Pe rm P re ss D e lic a t e s

H a n dW a sh a b l es

H e av y W ash 23 .0 /4 9 . 0 20 .0 /4 5 . 5 20 / 46 . 5 N o t A p p l ic ab le

N o r m al W a sh 17 .0 /4 3 . 0 14 .0 /3 9 . 5 14 .0 /4 0 . 5 N o t A p p l ic ab le

L i g h t / Q u i c kW a s h

11 .0 /3 7 . 0 8 . 0 / 33 .5 7 . 0 / 34 .5 N o t A p p l ic ab le

F in a l S p i n(R PM / M i n )

80 0 / 3 . 5 60 0 / 3. 0 50 0 / 4 . 5 N o t A p p l ic ab le

M a x E x t ra ctC y cle s C o t t o n / S t u rd y

E a sy C a r e /Pe rm Pre ss D e lica t e s

H a n dW a sh a b l es

H e av y W ash 23 .0 /4 6 . 0 20 .0 /4 1 . 5 2 0 .0 /4 2 . 0 20 .0 /4 3 . 0

N o r m al W a sh 17 .0 /4 0 . 0 14 .0 /3 5 . 5 1 4 .0 /3 6 . 0 14 .0 /3 7 . 0

L i g h t / Q u i c kW a s h

11 .0 /3 4 . 0 8 . 0 / 29 .5 8 .0 /3 0 .0 8 .0 /3 1.0

F in a l S p i n(R PM / M i n )

80 0 / 4 . 0 60 0 / 3. 5 5 0 0/ 5 . 0 50 0/ 5 . 0

Cotton/ Sturdy Easy Care/Perm Press

Delicates Hand W ashables

7/3 5/3 6/24 3/27





GENERAL COMPONENT EXPLODED VIEW




2 - 12 - 12 - 12 - 12 - 11 6 0 0 8 3 7 3 - 0 1 SECTION 2. ELECTRICAL COMPONENTS & TESTING

SECTION 2 . ELECTRICAL COMPONENTS & TESTINGSECTION 2 . ELECTRICAL COMPONENTS & TESTINGSECTION 2 . ELECTRICAL COMPONENTS & TESTINGSECTION 2 . ELECTRICAL COMPONENTS & TESTINGSECTION 2 . ELECTRICAL COMPONENTS & TESTING

D e s c r i p t i o nD e s c r i p t i o nD e s c r i p t i o nD e s c r i p t i o nD e s c r i p t i o n Par t NumberPar t NumberPar t NumberPar t NumberPar t Number

Analog Test Meter 2000 000 5

Digital Test Meter 2 0 0 0 1 0 0 1

Clamp-On Ammeter 2000 000 2

AC Voltage Sensor 2 0 0 0 0 0 8 1

Digital Test MeterDigital Test MeterDigital Test MeterDigital Test MeterDigital Test Metercan be used to check foropen or closed circuits,

measure resistance,AC and DC volts,and temperature .

AC Voltage SensorAC Voltage SensorAC Voltage SensorAC Voltage SensorAC Voltage Sensorcan be used to alert you ifAC voltage is present so proper

safety precautions can be observed.The tip of the sensor will glowbright red if voltage is between110-600 volts AC.

Clamp-On Ammete rClamp-On Ammete rClamp-On Ammete rClamp-On Ammete rClamp-On Ammete rcan be used to detectshorts. Overloads onthe circuitbreaker or fusecan be tracedto either thewasher or circuitbreaker by check-ing the washercurrent draw.

Analog Test MeterAnalog Test MeterAnalog Test MeterAnalog Test MeterAnalog Test Metercan be used to checkfor open or closedcircuits, measure resis-tance, AC and DC volts,and temperature.

The equipment required to service Maytagproducts depends largely upon the conditions

you encounter. Locating a malfunction will

ELECTRICAL TEST EQUIPMENTELECTRICAL TEST EQUIPMENTELECTRICAL TEST EQUIPMENTELECTRICAL TEST EQUIPMENTELECTRICAL TEST EQUIPMENToften require the use of electrical testingequipment such as :



© 1 9 9 8 M a y t a g C o r p o r a t i o n

16 0 0 8 3 7 3 - 0 1 SECTION 2. ELECTRICA L COMPONENTS & TESTING2 - 2

E L E C T R I C A L T E S T S

Warning - A l w a y s s h u t o f fe l e c t r i c a l p o w e r t o t h eu n it b e f o r e b e g in n in g a n y

s e r v i c e r e p a i r p r o c e d u r e s .

Water Valve Tes t

C h e c k t h e w a t e r v a l v e f o r e l e c t r i c a l c o n t i n ui ty. This check should be made wit h t he elec-t r i c a l s u p p l y d i s c o n n e c t e d f r o m t h e w a s h e rRemove the wire harness f rom the water valv

t e rmina l s and p lace t he ohm met e r p robes ont he t e rmina l s o f t he wat e r valve . The wat e rv a l v e s o l e n o i d c o i l s h o u l d h a v e a r e s i s t a n c eb e t w e e n 5 0 0 - 10 0 0 o h ms . If n o o h ms ar es h o w n o n t h e d i s p l a y o f t h e e l e c t r i c a l t e s tmet e r , t he so leno id coi l has an open wind ingand t he valve should be r eplaced. The t her-mistor in the water valve changes in resistancei n d i r e c t r e l a t i o n s h i p t o w a t e r t e m p e r a t u r e sTo moni to r the per formance of the the rmis to rrun a par t ia l hot water f i l l and check the ohmresis t ance of t he t hermistor c ircui t . Then, r ua c o l d w a t e r f i l l a n d m e a s u r e t h e r e s i s t a n c eaga in . Ther e should be a no t ab le d i f f e r encein t he r es is t ance r eadings. To check t he ohmr e s i s t a n c e , p u l l t h e P 2 w i r e h a r n e s s c o n n e c -t o r o f f t h e m a c h i n e c o n t r o l a n d l o c a t e t h eP2(5) and P2(6) leads in t he connect or(Figure 2 - 3).

Vo l t a g e C h e c k s

Genera l ly, these checks wi l l cons i s t o f t ak ingr e a d i n g s a t t h e w a l l r e c e p t a c l e t o d e t e r m i n et he avai labil i ty of vol tage t o t he product . Vol t -a g e c h e ck s o n i n d i v i d u a l c o mp o n e n t s o f ap r o d u c t a r e n o t r e c o m m e n d e d d u e t o t h epossibili t y of elect r ical shock. Component partt e s t i n g i s b e s t a c c o m p l i s h e d t h r o u g h c o n t i -

n u i t y c h e c k s w i t h a n A p p l i a n c e Te s t M e t e r(See Elec t r i cal Tes t Equipment ) .

NOTE: U s e o f t h e m e t e r o n v o l t a g e h i g h e r t h a n t h e i n di ca t e d r a n g e ma y c a u s e p er ma - nent damage t o t he met er. To prevent damage , f i r s t se lec t the h ighes t range and then lower the range for readings which fa l l wi thin the lower sca le .

Se t up mete r fo r use as fo l lows :

1. Turn select or knob t o desir ed met er f unc-t i o n a n d a p p r o p r i a t e r a n g e .

2. Plug black lead int o socket marked black( - ) .

3. Plug r ed lead int o socket mark ed r ed (+).

4 . P lace t es t l eads in t o recept acle t o de te r-mi n e v o l t a g e a v a i l a b l e .

Wax Mot o r Check - Door LockM e c h a n i s m

C h e c k t h e w a x m o t o r f o r p r o p e r r e s i s t a n c eThis check should be made with t he e lectr icas u p p l y d i s c o n n e c t e d f r o m t h e w a s h e r.Re -m o v e t h e w i r e h a r n e s s f r o m t h e w a x m o t o rt e rmina l s and p lace t he ohm met e r p robes ont he t erminals of t he wax mot or. The wax motor should have a res i s tance o f approx imate ly19 0 0 o h ms a t r o o m t e mp e r a t u r e . To c h e ckw a x m o t o r s t h r o u g h c o n s o l e , s e e s e c t i o n :Ma c hi n e Co n t r o l p a g e 2 - 5 .

Gr o u n d e d Co mp o n e n t s

W h e n pe r f o r m i ng s e r v i c e d i ag n o s t i cs , r e -p l a c eme n t s a n d r e p a ir s , a l w a y s c h e ck t o d e -t e r m i n e w h e t h e r a l l g r o u n d w i r e s l i n k i n gp a n e l a nd c omp o n e nt s a r e r e a t t a c he d ifr e m o v e d .




2 -32-32 -32-32-316008373-01 SECTION 2. ELECTRICAL COMPONENTS & TESTING

Timer & Console Swit chesTimer & Console Swit chesTimer & Console Swit chesTimer & Console Swit chesTimer & Console Switches

The ti mer is located in t he control console onthe back. It is composed of a series of switchesdriven by an elect ric t imer motor. The timermotor rotat es a pinion gear which then rotat es

int ernal cams. As t he cams rotate, they liftand drop various swit ch contacts which ri deon the cam. The internal switches providecycle sequence or step input s to t he machinecontrol to control the pump, dispenser waxmotors, delay light, ON light and timer motor.

The timer wire harness connector can bepulled and the individual contact s for t he vari-ous circuits can be checked with an ohm

meter. As ill ustrat ed, t imer contact for thedrain pump is 14T (Figure 2-1).(Figure 2-1).(Figure 2-1).(Figure 2-1).(Figure 2-1).

You can identi f y the wir e for t he drain circuit(Figure 2-2)(Figure 2-2)(Figure 2-2)(Figure 2-2)(Figure 2-2) by tracing down the side of theconnector t o contact 14, and across to al ignwi th column T.

Contact 8B in the connector is a direct con-t act to t he neutral leg of t he timer. When an

ohm meter probe is placed into the 14T con-nection and the other probe is placed into 8B,an ohm reading of t he complet e drain circuitcan be perf ormed. The drain circuit shoul dhave a resist ance of approximately 18 ohms.This is the resistance reading of the pump

Figure 2-1Figure 2-1Figure 2-1Figure 2-1Figure 2-1

Figure 2-2 Figure 2-2 Figure 2 -2 Figure 2-2 Figure 2 -2

Description Connector Connector Ohms

PumpMotor

14T 10B 18

Bleach WaxMotor

2B 10B 950-1100

Softener

Wax Motor 2T 10B 950-1100

Timer Motor

10T 10B 5000

Timer Input Chart sTimer Input Chart sTimer Input Chart sTimer Input Chart sTimer Input Chart s

As stated previously, the machine controlboard receives inputs f rom the ti mer monit orwhere the t imer is in t he cycle. The machinecontrol board accomplishes this by routingfour circuit s through the timer. Two of the cir-cuit s (1A & 1B) are supplied wit h 120 VAC andt he other t wo circuit s (2A & 2B) are 24 VDC.The voltages for t he four circuit s is shown onthe timer chart of the electrical schematicenclosed in the washer console.

motor windings. The foll owing chart can beused for checking ot her components via t het imer wire harness connector.

TTTTT CCCCC BBBBB





Ke y: 0 = In pu t Sign al Not A s s er t e d 1= In pu t Sig na l A s s e r t e d

S o f t w a r e i n t h e m a c h i n e c o n t r o l b o a r d s p e c i f i c a l l y m o n i t o r s t h e t i m e r i n p u t c i r c u i t s det ermine wher e t he t imer is in a l l t he wash cycles and wil l r apidly advance t he t imer tOPEN and break cont acts in t he t imer . The t imer is sole ly used as an of f - board set ofre lay switches .Note : The t imer mot or is har d wired t o t imer cams 10T and 10B in t he t i m e r .

CYCLE SEQUENCE

TIMER 1A(120 VAC)PK19/P7(8)

TIMER 1B(120 VAC)YL16/P7(7)

TIMER 2A(24 VDC)PU17/P3(3)

TIMER 2B(24 VDC)BU18/P3(5)

PREWASH TUMBLE 0 1 1 0

PREWASH DRAIN 1 1 1 0

MAIN WASH TUMBLE 0 1 0 0

LIGHT WASH TUMBLE 1 1 0 0

BLEACH DISPENSE 1 0 1 0

RINSE TUMBLE 1 0 0 1

SPIN 1 0 0 1 0

SPIN 2 0 0 0 1

SPIN 3 0 1 0 1

EXTRA RINSE 1 1 0 1

DELAY 1 0 0 0

IDLE 0 0 0 0

T h e r e a r e c o n d i t i o n s u n d e r w h i c h t h e m a c h i n e c o n t r o l w i l l s h u t t h e c y c l e d o w n i f t ht i m e r d o e s n o t a d v a n c e .

- Du r i ng Ex t r a Wa s h/ P r e w as h : If t h e t i me r in pu t s d o n ot c ha ng e a w ay f r o m P r e w asTumble f o r 15 minut es , t he machine con t r o l wi l l open t he l ine re lay.

- Du r i n g Ma in Wa s h : If t h e t i me r i np u t s d o n o t c ha ng e f o r 2 9 mi nu t e s , t h e ma ch in

cont ro l wi l l open the l ine re lay.

- Du r i n g a n y in cr e me nt w h en t h e ma ch in e co nt r o l e n er g i z es t h e t i me r mo t o r u n t i l isees t he t imer input s change: If t he t imer input s do not change f or 5 minut es wit h thet i m e r m o t o r c o n t i n u o u s l y e n e rg i z e d , t h e m a c h i n e c o n t r o l w i l l o p e n t h e l i n e r e l a y.

T h e s e v a r y i n g d e l a y s a r e t o a l l o w t h e w a s h e r t o p r o g r e s s t h r o u g h s e v e r a l i n c r e m e n t sw h e r e t h e t i me r i n p u t s n o r ma l l y d o n o t c h a n g e. In t h e s e c a s e s , t h e ma c h in e c o nt r o lenergizes t he t imer mot or f or 30 seconds, which is i t s advance t ime. It does not look f oa t i m e r i n p u t c h a n g e .





Figure 2-3 Figure 2-3 Figure 2-3 Figure 2-3 Figure 2 -3

Both incoming and exit ing volt age are monit ored through the machine control board and thesurrounding circuit ry. The followi ng t able lists t he volt ages for t he various terminals on themicroprocessor board. If proper voltage is not present, check swit ches and wiring for anyloose connections or open circuit s by disconnecti ng the power supply and performing conti -nuit y checks of individual circuits. NOTE:NOTE:NOTE:NOTE:NOTE: Connector P5 is Neutral i nput and L1 input is t he Connector P5 is Neutral i nput and L1 input is t he Connector P5 is Neutral i nput and L1 input is t he Connector P5 is Neutral i nput and L1 input is t he Connector P5 is Neutral i nput and L1 input is t he Line Relay Connector Comm (Gray wire), L1 output is Line Relay Connector Comm (Black Line Relay Connector Comm (Gray wire), L1 output is Line Relay Connector Comm (Black Line Relay Connector Comm (Gray wire), L1 output is Line Relay Connector Comm (Black Line Relay Connector Comm (Gray wire), L1 output is Line Relay Connector Comm (Black Line Relay Connector Comm (Gray wire), L1 output is Line Relay Connector Comm (Black wire).wire).wire).wire).wire).

To check volt ages f rom the board, turn timer dial to a wash cycle and press the start / of f but ton.This wil l act ivate t he L1 relay board and apply power on t he machine control .

Machine Cont rolMachine ControlMachine Cont rolMachine ControlMachine Control

The machine control microprocessor board is located i n the cont rol console, mounted t o t herear panel. The board receives input f rom t he ti mer, door latch and lock swit ches, and unbal-ance and selector swit ches on the console. It also communicates wit h the mot or control boardt o facili t ate t he various cycles and drive the motor for opti mum perf ormance. Torque andspeed of t he motor are monit ored through the motor control board.

Prior to Series 17Prior to Series 17Prior to Series 17Prior to Series 17Prior to Series 17

Series 17 and Aft erSeries 17 and Aft erSeries 17 and Aft erSeries 17 and Aft erSeries 17 and Aft er

Figu re 2-3b Figure 2-3b Figu re 2-3b Figure 2-3b Figure 2-3b





FUNCTIONM A C H IN EC O N T R O LBOARDT E RM IN A L / W I RE

M A C H IN EC O N T R O LBOARDT E RM IN A L / W I RE

VOLTAGE-APPROX.(W hen Activated)

TIM ERC O N TA C T

Permanent Press(Fabr ic Swi tch)

P5 (W H11) P3/2 (PK 37) 24 VDC No t Inv o lved

Delicates(Fabr ic Swi tch)

P5 (W H11) P3/6 (OR 38) 24 VDC No t Inv o lved

Hand W ash(Fabr ic Swi tch)

P5 (W H11) P3/8 (BR 39) 24 VDC No t Inv o lved

Cot ton /S turdy(Fabr ic Swi tch)

P 5 ( W H 11 )P 5 ( W H 11 )P 5 ( W H 11 )

P3/2 (PK 37)P3/6 (OR 38)P3/8 (BR 39)

0 VDC0 VDC0 VDC

Not Invo lved

S i gn a l O N / O F F(Opt ions Swi tch)

P5 (W H 11 ) P2/1 (PU 21) 24 VDC - O N0 VDC - OFF

Not Invo lved

Extra Rinse

(Opt ions Swi tch)

P5 (W H 11 ) P7/8 (PK 19) 120 VA C 12B, 6B ,8T

M ax Ext ract(Opt ions Swi tch)

P5 (W H 11 ) P2/3 (Y L 20) 24 VDC No t Inv o lved

Push To Star tSw itch( W h e n p r e s s e d )

P5 (W H 11 ) P1/3 (RD 28) 120 VA C No t Inv o lved

U nbalanceControl

P5 (W H11) P2/4 (OR 40) 24 VDC No t Inv o lved

Doo r Lock - Sp in P3 (1) P3/7 (Y L 36) 24 VDC No t Inv o lved

M otor Control &

M achine Control

P5 (W H11) LIN E RELA Y COM

(BK 27 or BK1)

120 VA C No t Inv o lved

H o t W a t er Va l v e P5 (W H11) P7/1 (OR7) 120 VA C o r5 00 - 10 0 0 O h m s

Not Invo lved

Cold Wa te r Va lve P5 (W H11) P7/2 (BU 9 ) 120 VA C o r5 00 - 10 0 0 O h m s

Not Invo lved

Door Lock W axM ot o r

P5 (W H11) P7/4 (BR 14) 120 VA C No t Inv o lved

Bleach Wa xM ot o r

P5 (W H11) N o t Inv o lved 120 VA C 2T

Softener W axM ot o r

P5 (W H11) N o t Inv o lved 120 VA C 2B

Dela y Light P5 (W H11) N o t Inv o lved 120 VA C 4T

On Light(Series 17)

P5 (W H11) P7/5 (RD 3) 120 VA C No t Inv o lved





MOTOR CONTROL BOARDMOTOR CONTROL BOARDMOTOR CONTROL BOARDMOTOR CONTROL BOARDMOTOR CONTROL BOARD

The motor control board receives 120 VACvolt age from the l ine cord and distribut es DCvolt age t o the drive motor. The motor con-t rol converts the volt age from single phase to3 phase f or t he drive motor.

Another purpose of the motor control is tomonitor t he drive motor speed through a ta-chometer circuit linking the motor controlboard to a tachometer on the drive motor. Thisis a 3-wire ci rcuit comprised of a Black, Blueand White wi re harness. Failure of t his circuitwill cause the motor t o start jerking in placeor accelerate rapidly for up to 5 seconds. Thisoccurs whenever the t achometer in t he drivemotor is t rying to locate t he proper shutterand sensor sequence. For example, if t he ta-chometer signal is lost from the motor con-trol to the machine control just prior to spin,the motor will ramp up for 5 seconds thenstop.

The following illustration shows the motort erminals for each of t he coils involved. Thelet ters wit h positive and negative symbols in-dicate t he motor phase circuitry of theterminals.

Refer t o section t itl ed Motor Control Motor Control Motor Control Motor Control Motor Control for boardidentif ication of A, B and C terminal/ harnesses(Figure 2-6).(Figure 2-6).(Figure 2-6).(Figure 2-6).(Figure 2-6). Also, see t he wiring schemat icfor harness identif icati on.

Figure 2-5 Figure 2 -5 Figure 2 -5 Figure 2 -5 Figure 2 -5

DRIVE MOTORDRIVE MOTORDRIVE MOTORDRIVE MOTORDRIVE MOTOR

The drive motor i s a switched reluctance typemotor. The basic operati ng principle of t heswit ched reluct ance motor is direct magnet icatt raction between the stat ionary electromag-neti c coils (stat or) and a specially conf iguredrotor or armature (Figure 2-4)(Figure 2-4)(Figure 2-4)(Figure 2-4)(Figure 2-4) . The rot or iscomprised of stacked plates or laminationsmounted on a cent er shaf t . The shape ofthese laminations are characteristic of theswit ched rel uct ance motor. The rot or, whenviewed from the end of the rot or, has " teet h"much like a gear. These "t eeth" , or pole pieces,are pulled as the result of direct current powerthrough the stator coils.

Figure 2-4 Figure 2-4 Figure 2-4 Figure 2-4 Figure 2-4

Motor Harness Connector

Multiple st ator coils are positioned around therotor and are connected in three differentphased " sets" of paired coils.

Magneti c att raction causes the rotor poles t ot urn toward the coils. The elect ronic motorcontrol board switches the magnetic f ield offas the rotor pole piece approaches; then,

turns on another set of coils further ahead. Itis thi s switching action of mot or phases t hatdetermines direction and rotat ional speed ofthe rotor (and shaft ). The motor cont rol boardchanges the 120 VAC volt age line input t o 170VDC, and dist ribut es the current phases to t hestator coil sets in sequence to the drivemotor.




16008373-01 SECTION 2. ELECTRICAL COMPONENTS & TESTING 2-82 -82-82 -82-8

Motor & Motor ContrMotor & Motor ContrMotor & Motor ContrMotor & Motor ContrMotor & Motor Contr ol Tol Tol Tol Tol Testestestestest

1. Set the t imer knob into t he delay incre-ments.

2. Press the push-to-start switch to start t hewasher in the delay mode. Confirm t hedelay li ght i s ON.

3. Check f or 120 VAC between t he L and Nterminals (black wire no.27 and white wi reno. 13) on t he motor control board. If notpresent, check wiring between the ma-chine control and the motor controlboards.

4. Unplug the washer power cord. Test cordto the same board terminals.

5. Remove JP4 Inter face connector wir e har-ness on f ront end of mot or control board.

6. Plug the washer power cord into a 120 VACpower source. The mot or cont rol will im-mediately execute a t est routi ne and themotor should run, rotati ng the spinner at50 rpm.

6. If t he motor runs,If t he motor runs,If t he motor runs,If t he motor runs,If t he motor runs, and the spinner rotat esat the proper RPM speed, the problem li esoutside of the motor and motor controlcircuit . Disconnect power t o the washerand reconnect the JP4 Interface connec-tor t o the motor control.

7. If t he motor does not run:If t he motor does not run:If t he motor does not run:If t he motor does not run:If t he motor does not run:

A. Check t he 10-amp fuse located on thecontrol board, either visually or with anohm meter. If bad, completely replace mo-tor control/ wire harness assembly(Figure 2-6).(Figure 2-6).(Figure 2-6).(Figure 2-6).(Figure 2-6).


B. If the fuse is funct ioning, visually checkt he six semiconductors on the heat sinkf or any damage. If damaged, replace mo-t or control / wire harness assembly com-plet e and check motor w indings for dam-age (See Drive Mot or).(See Drive Mot or).(See Drive Mot or).(See Drive Mot or).(See Drive Mot or). Replace motor ifnecessary (Figure 2-6)(Figure 2-6)(Figure 2-6)(Figure 2-6)(Figure 2-6) .....

C. If f use and semiconductors show novisible damage, perform the motor phasetest.

8. Unplug the washer power cord and re-place motor control board connector JP4when f inished.

Motor Phase TMotor Phase TMotor Phase TMotor Phase TMotor Phase T estestestestest

It i s possible for t he motor t o stil l run underlight loads when one of the phases of themotor is nonfuncti onal. One possible symp-tom would be a "growling" noise from the

motor. Torque is decreased when the mot oris out of phase. This could result i n a cus-tomer complaint that the load is not spinningout properly or it does not tumble consistent lywith a large load (See Section 3: T (See Section 3: T (See Section 3: T (See Section 3: T (See Section 3: T r r r r r ouble- ouble- ouble- ouble- ouble- shooting).shooting).shooting).shooting).shooting).




2 - 916 0 0 8 3 7 3 - 0 1 SECTION 2. ELECTRICA L COMPONENTS & TESTIN

M ot o r Wi n d in g s Ch e c k

1 . D i s c o n n e c t p o w e r t o t h e u n i t .

2 . Re mo v e e ach pa ir o f p ha s e w ir e s f r o m m o t o r c o n t r o l a n d p e r f o r m a n o h m c hof each wi re l eading t o t he mot or . Ewire pair should show 2- 3 ohms r es is t a(Figure 2 - 5).

2 . T h er e s h o ul d b e n o co nt in ui t y b e t wany of the t e rmina l s and the f rame of m o t o r .

3 . Ch ec k t h at a l l si x mo t o r t e r min al s a r e cure and a t the same he igh t in the con e c t o r h o u s i ng . R ep l a c e mo t o r i f t e rna l s a re p ressed in to the motor.

4 . Re mo un t t h e s ix - p os i t io n mo t o r co nnt o r o nt o t h e mo t o r . Re a s s emb l e t h e ds h i e l d c o v e r o n t o t h e m o t o r c o n t r o l .

5 . Re po s it i o n t h e mo t o r c on t r o l i nt o

washer when f inished. Make sur e t he screws and the twis t lock wire t ies are ft e n e d p r o p e r l y t o t h e w i r e h a r n e s s .

To ga in access to the motor con t ro l boardt e r m i n a l s( Fi g u r e 2 - 6 ) :

1 . D i s c o n n e c t p o w e r t o t h e w a s h e r p r i o r t ot e s t i n g .

2 . Re mo v e t h e t w o s cr e w s s e cu r in g t h e mo -t or cont r ol assembly t o t he base. Unsnapt he t wo twis t - lock wire t i es res t ra ining them o t o r t o t h e m o t o r c o n t r o l b o a r d h a r n e s sb a s e .

3 . Remove t he g reen ground wire , l ine & neu-t ra l wi res and the JP4 connec tor f rom them o t o r c o n t r o l b o a r d .

4 . Ca r ef ul l y lif t t he f r o nt e nd of t he mot or

con t ro l board to d i sengage the rea r lock-ing t abs f r om t he slot s in t he base. Slowlyd r a g t h e m o t o r c o n t r o l b o a r d , w i t h m o t o rh a r n e s s a t t a c h e d , t o w a r d t h e f r o n t o f t h ewasher and p lace in f ron t o f the washer.

5 . Re mo v e t h e s c r e w s e cu r i ng t h e s p l as hshield cover ing the face of the motor con-t rol board. Pivot t he splash shield with tops c r e w i n t h e m o t o r c o n t r o l b o a r d m e t a lf r a m e , a l l o w i n g t h e p l a s t i c s h i e l d t o b e -

c o m e a n e l e c t r i c a l s h i e l d b e t w e e n t h em o t o r c o n t r o l b o a r d a n d t h e b a s e .

6 . Reconnec t t he ground wire , l ine 1 and neu-t ra l wires . Leave t he JP4 connector off t heboard (Figure 2 - 6) .

7 . P la ce t h e t i me r k n ob in t o t h e d el ayi n c r e m e n t s .

8 . P lug t he power cord in t o t he wal l socke t

a n d p r e s s t h e p u s h - t o - s t a r t b u t t o n .

9. Check Phase Cby d i sconnect ing the ye l -l o w o r o r a n g e w i r e a t t h e m o t o r c o n t r o lboard. If t he mot or operat es with a s l ightgrowling sound, phases A and B are oper-a t ing cor r ec t ly. Reconnect phase C andt e s t w i t h p h a s e B d i s co n n ec t e d . If t h em o t o r d o e s n o t r u n p r o p e r l y, p h a s e A o rB i s n o t f u n c t i o ni n g. P e r f o r m t h e mo t o r

w i n d i n g s c h e c k( S ee M o t o r W i n d in g sC h e c k ) .

10. Check Phase Bby d i sconnec t ing the whi tor red wire a t t he motor cont rol board.t h e m o t o r o p e r a t e s w i t h a s l i g h t g r o wsound, phases A and C ar e operat ing cor ect l y. Reconnect phase B and t es t wphase A di sconnect ed . If t he mot or dnot run properly, phase A or C is not fut i o n in g . P e r f o r m t h e mo t o r w i n d icheck ( S e e Mo t o r Wi n d i n g s Ch e c k ) .




16008373-01 SECTION 2. ELECTRICAL COMPONENTS & TESTING 2-102-102-102-102-10

TTTTTachometer Cirachometer Cirachometer Cirachometer Cirachometer Cir cuit Diagnost icscuit Diagnosticscuit Diagnost icscuit Diagnosticscuit Diagnostics

The tachometer system of t he motor is com-prised of a plast ic wheel, called a shutt er, andan optical sensor (Figure 2-9).(Figure 2-9).(Figure 2-9).(Figure 2-9).(Figure 2-9). The shutt er ismounted to t he end of t he motor shaf t underthe plastic endbell covering of the motor. The

edge of t he shutt er resembles a " picket f ence"wit h diff erent size "picket s." The patt ern con-sists of six diff erent " pickets" which are re-peated eight ti mes. An opti cal sensor ismount ed to one side of t he shut ter and moni-tors t he "picket s" as they pass through thesensor.

As the " pickets" pass through the sensor field,signals are generated and transmitt ed to t hemotor control board through the tachometer

wire harness (Figure 2-10 and 2-11).(Figure 2-10 and 2-11).(Figure 2-10 and 2-11).(Figure 2-10 and 2-11).(Figure 2-10 and 2-11).



PHASE WIRE COLORS MOTOR CONDITION RESULT/SOLUTION

C Yellow or Orange Runs

Does Not Run

-Phases A&B are operating correctly.(Check Phase A and B)

-Phase A or B is non-functional.(See Step 10)

B White or Red Runs

Does Not Run

-Phases A&C are operating correctly.(Check Phase A and C)

-Phase A or C is non-functional.(See Step 10)

A Black or Blue Runs

Does Not Run

-Phases B&C are operating correctly.(Check Phase B and C)

-Phase B or C is non-functional.(See Step 10)




2-112-112-112-112-1116008373-01 SECTION 2. ELECTRICAL COMPONENTS & TESTING

The motor cont rol monit ors t he signals and

communicates this information to the ma-chine control. The purpose of t his signal is totel l t he motor when to energize each windingin the motor and to tel l t he machine controlthe act ual motor speed.

Note:Note:Note:Note:Note: If t he machine control board does not If t he machine control board does not If t he machine control board does not If t he machine control board does not If t he machine control board does not receive an input signal from the motor con- receive an input signal from the motor con- receive an input signal from the motor con- receive an input signal from the motor con- receive an input signal from the motor control/ tachometer circuit (JP4 connector), the trol/ tachometer circuit (JP4 connector), the trol/ tachometer circuit (JP4 connector), the trol/ tachometer circuit (JP4 connector), the trol/ tachometer circuit (JP4 connector), the motor speed will rapidly accelerate f or 5 sec- motor speed will rapidly accelerate for 5 sec- motor speed will rapidly accelerate f or 5 sec- motor speed will rapidly accelerate for 5 sec- motor speed will rapidly accelerate for 5 seconds t hen shut down. The machine control onds t hen shut down. The machine control onds t hen shut down. The machine control onds t hen shut down. The machine control onds t hen shut down. The machine control

will sense a " locked rotor" condition and the will sense a "l ocked rotor" condition and the will sense a " locked rotor" condition and the will sense a "l ocked rotor" condition and the will sense a " locked rotor" condition and the motor will stop. If the motor control does motor will stop. If the motor control does motor will stop. If the motor control does motor will stop. If the motor control does motor will stop. If the motor control does not r not r not r not r not r eceive an input signal fr eceive an input signal fr eceive an input signal fr eceive an input signal fr eceive an input signal f r om the motor om the motor om the motor om the motor om the motor ,,,,,the motor will " jerk" for 5 seconds then shut the motor will " jerk" for 5 seconds then shut the motor will " jerk" for 5 seconds then shut the motor will " jerk" for 5 seconds then shut the motor will " jerk" for 5 seconds then shut down.down.down.down.down.

1. Inspect the motor control wire harness forintegrity of the connecti ons on both ends.The harness is comprised of a Whit e, Blueand Black wi re.

2. Set t he washer into the Delay Wash cycleand press the start/ off button. The unit willstart wit hout acti vating the motor. Leavethe t achometer harness on the motor con-trol and insert the meter probes int o theback side of t he tachommeter harness.


Tachometer Wire Checks Voltage Found Condition Of

Component

White to Black(From Motor Control)

11 VDC(± 2.5 VDC)

Good Motor Control Board

White To Black(From Motor Control)

0 VDC Bad Motor Control Board

White To Black(From Motor Control)

+ 13 VDC or <9 VDC Bad Motor

Blue to Black(From DriveMotor)

No change inDC volts asmotor is turnedslowly

Bad Motor

Blue to Black(From DriveMotor)

Voltagechanges from 0- 5 VDC volts asmotor is turnedslowly.

Good Motor

UNBALANCE CONTROL SYSTEMUNBALANCE CONTROL SYSTEMUNBALANCE CONTROL SYSTEMUNBALANCE CONTROL SYSTEMUNBALANCE CONTROL SYSTEM

The unbalance control system is comprisedof the inerti al switch, outer t ub displacementswit ch, strut displacement switch and a cabi-net vibrati on sensor mount ed to t he machinecontrol board. The three swit ches are wiredin series on a 24 VDC circuit, monitored byt he machine cont rol board. The sensor ismounted on t he machine control board.

Software in the machine control board willbegin monit oring the swit ches when the spinspeed reaches 90 rpm. The inert ial unbalanceswitch monitors outer tub vibrations above150 rpm. Inside the door is a cabinet vibra-t ion absorber designed t o counter t he vibra-t ion of the t ub and serve as a tuned absorberfor the whole washer.

The fol lowing t able indicates volt age checksof t he tachometer harness betw een the mo-t or and motor control board.





R P M F U N C T I O N

4 7 ...........................T u mb l e47 - 85 .......................Di s t r ib ut io n90- 250 .. ...... ....... ......A ccel er at e Th r ou gh

Cr it ical250- 4 99 ..... ....... ......A ccel er at e Th r ou gh

Cr it ical500 - 575 ..... ....... ......High S pee d Ac cel er at ion- WILL DROP TO 450 RPM

600 - 675 ..... ....... ......High S pee d Ac cel er at ion- WILL DROP TO 555 RPM

> 6 7 5 .... ...... ....... ......High Spe ed A ccel er at ion- WILL DROP TO 650 RPM

75 0- 80 0 .............T OP SP IN S PEED

Figure 2- 12

S t r u t D i s p l a c e m e n t S w i t c h

The s t rut displacement switch is c l ipped to tht op of t he l e f t r ea r s t r u t . The swit ch sensest h e o u t e r t u b b o t t o m i n g o u t o n t h e s t r u t a st he machine acce le r a t es above 90 r pm. Thisi s caused by the twis t ing mot ion of the ou te r

t ub. This addit ional swit ch is r equir ed becausthe twis t ing mot ion may no t t r ip the ou te r tud i s p l a ce me n t s w i t c h . T h e p r i m a r y c a u s e f o rac t iva t ion would be an unba lance a t the f ron tand rea r o f the sp inner on oppos i te s ides .

The s t ru t d i sp lacement swi tch i s wi red in se -r i e s w i t h t h e t u b d i s p l a c e m e n t s w i t c h a n dc a u s e s t h e s a m e t y p e o f r e d i s t r i b u t i o n .

Te s t i n g t h e S t r u t D i s p l a c e m e n t S w i t c h :


2 . P la ce oh m me t e r l e ad s acr o s s t h e t w o t e r -mina l s o f t he swi tch . Depress t he bu t t onon t he swi tch . If t he con t act s c lose, t heswit ch is good. If not , r eplace t he swit ch

Tu b D i s p l a c e m e n t S w i t c h

The tub displacement switch is located on theupper r igh t hand s ide o f the ou te r tub , be lowt h e t o p c o n c r e t e w e i g h t , b e t w e e n t h e o u t e rt u b a n d t h e c ab in e t . T h e s w i t c h s e n s e s t h e

o u t e r t u b t o u c h i n g t h e c a b i n e t s i d e a s t h ema c h in e p a s s e s t h r o u g h c r i t i c al . W h e n t h i sswi tch i s t r ipped , the machine s tops and re -d i s t r i b u t e s t h e l o a d .

Te s t i n g t h e Tu b D i s p l a c e m e n t S w i t c h :


2 . P la ce oh m me t e r l e ad s acr o s s t h e t w o t e r -mina l s o f t he swi tch . Depress t he bu t t on

on t he swi t ch . If t he cont act s open, t heswit ch is good. If not , r eplace t he swit ch

W h e n e v e r a d i s p l a c e m e n t s w i t c h i s t r i p p e d ,t h e m a c h i n e s t o p s a n d r e d i s t r i b u t e s t h eclot hes load. This involves a t hr ee (3) secondpause, f ol lowed by a f ive (5) second r ever set umble (47- 49 rpm) t o red is t r ibu t e the c lot hesload . The washer wil l pause aga in f o r t h ree(3) seconds , then s ta r t the d i s t r ibu t ion p rof i l eaga in . To r ed i s t r ibu te t he load , t he machinet u mb l e s t h e l o a d (5 0 - 9 0 r p m ) a n d a ga i n a t -t e m p t s t o p a s s t h r o u g h c r i t i c a l ( a b o u t 1 5 0r p m) . T h e ma ch in e w i l l t r y t o r e d is t r i b u t et w i c e a s t h e w a s h e r a t t e m p t s t o s p i n a t 8 0 0r p m .

O n c e t h e l o a d i s p r o p e r l y r e d i s t r i b u t e d a n dt he speed r eaches above 500 rpm, t he iner t ia lswi tch and cab ine t v ib ra t ion sensor a re used .If the inertial switch or sensor is activated, thewasher will drop in spin speed. This is basedu p o n t h e s p e e d a t w h i c h s w i t c h a c t i v a t i o nt akes place. SeeFigure 2- 12 outlining the spins p e e d c a t e g o r i e s a n d t h e c or r e s p o n di n g r e -duced speeds . If t he swi t ches a re no t ac t i -vat ed, the f inal spin speed wil l r each a maxi-m u m o f 8 5 0 r p m a n d t h e n d r o p t o f i n d t h eo p t i mu m p e r f o r m a n ce l e v e l , b a s e d u p o nr e a d i n g s t a k e n b y t h e c a b i n e t v i b r a t i o n s e n -sor . Consumer s may be conf used by t he up-and- down cycl ing o f t he mot or. However, t hem a c h i n e i s s e a r c h i n g f o r t h e o p t i m a l s p e e dp e r f o r m a n c e .




2 - 1316 0 0 8 3 7 3 - 0 1 SECTION 2. ELECTRICA L COMPONENTS & TESTIN

C a b i n e t Vi b r a t i o n S e n s o r

The cabinet vibrat ion sensor is mounted to thel o w e r l e f t c o r n e r o f t h e m a c h i n e c o n t r o l

board . Th is i s a p iezo- e lect r i c s t r ip mount edt o t h e ma c hi n e c o nt r o l b o a r d . Wit h a ma s sa t tached to the end of the s t r ip , the machinec o n t r o l l e r m o n i t o r s t h e c a b i n e t v i b r a t i o n a st he machine r eaches t op speed. The machinecontrol ler uses the vibrat ion sensor to a t temptto spin the washer a t the opt imum speed witht he least amount of vibrat ion. Opt imum speedc h a n ge s f r o m ma c h in e t o ma c h in e d u e t o :changes in mass o f t he absorber ; changes in

C a b i n e t Vi b r a t i o n A b s o r b e r

This is a tuned absorber mounted in the dT h e t u n e d a b s o r b e r c o n s i s t s o f a m a s s s upended by spr ings tuned to vibrate a t apprmat e ly 800 r pm. The mass v ib ra t es 180 g r e e s o u t o f p h a s e w i t h t h e v i b r a t i o n o f cabinet . This cancels out much of t he vibtion caused by the clothes load at 800 rpm(See

S e c t i o n 5 : Ca b i n e t A s s e m b l y ) .

I n e r t i a l U n b a l a n c e S w i t c h

The iner t ia l unbalance switch is located on theupper right hand side of the outer tub, in frontof t he t op concr e t e weigh t . The swi t ch con-s i s t s o f a m o v i n g w e i g h t i n t h e s w i t c h b o d y

which pres ses against t he swit ch cont acts . Ift h e u n b a l a n c e o f t h e o u t e r t u b b e c o m e s t o oer r a t i c, t he moving weight wi l l open the con-t ac t s in t he swi t ch . When t he machine con-t rol ler senses the switch opening, the machinec o n t r o l l e r w i l l r e d u c e t h e s p i n s p e e d t o 6 5 0 ,5 5 0 , o r 4 5 0 r p m d e p e n d i n g o n t h e c u r r e n tspeed closest to the level spin speed (i .e. 625rpm t r ip would d rop to 550 rpm)(See Figure 2 - 12 ) .

Te s t i n g t h e I n e r t i a l U n b a l a n c e S w i t c h :

Tes t ing o f the swi tch may prove d i ff i cu l t . Thes w i t c h w i l l n o t o p e n u n l e s s t h e s w i t c h i smoved side to side cr eating a "G" f orce of 8 - 9Ft. lbs.


2 . P la ce oh m me t e r l e ad s acr o s s t h e t w o t e r -mi n al s of t h e i n er t i a l s w i t c h . Mo v e t h eswitch side t o side. If t he cont act s do noto p e n e a s il y, t h e s w i t c h i s g o o d. If t h eswitch contacts are open or easi ly t r ipped,r e p l a c e t h e s w i t c h .

s p r i n g r a t e o f t h e a b s o r b e r ; a n d c h a n g e st he pul ley- bel t ra t io. It can a lso change frun to run due to the s ize of the c lothes land t ype of f loor. The sensor f inds t he omum speed on ever y run. The opt imum spis between 750 and 850 rpm.








1 6 0 0 8 3 7 3 - 0 1 SECTION 3. TROUBLESHOOTING3 - 13 - 13 - 13 - 13 - 1

SECTION 3. TROUBLESHOOTINGSECTION 3. TROUBLESHOOTINGSECTION 3. TROUBLESHOOTINGSECTION 3. TROUBLESHOOTINGSECTION 3. TROUBLESHOOTING

Shuts OFF In The Middle Of The Spin Cycle:Shuts OFF In The Middle Of The Spin Cycle:Shuts OFF In The Middle Of The Spin Cycle:Shuts OFF In The Middle Of The Spin Cycle:Shuts OFF In The Middle Of The Spin Cycle:

During the spin cycle, the machine controlmonitors the door lock mechanism to ensurethe door is locked. This is done through thedoor lock enable switch. During "lock mode,"the shaft of the door lock mechanism ispressed forward by the door lock wax motor,and the shaft presses in the button of the doorlock enable switch. If the machine controlboard sees the switch OPEN during the spincycle, the machine control board will auto-matically shut the washer OFF. This is caused

by a weak spring in the door lock wax motor.Replace the complete door lock mechanism.

Warning Warning Warning Warning Warning - Always shut off- Always shut off- Always shut off- Always shut off- Always shut offelectrical power to theelectrical power to theelectrical power to theelectrical power to theelectrical power to theunit before beginning anyunit before beginning anyunit before beginning anyunit before beginning anyunit before beginning any

service repair procedures.service repair procedures.service repair procedures.service repair procedures.service repair procedures.

Runs For Five Seconds Then Shuts OFF:Runs For Five Seconds Then Shuts OFF:Runs For Five Seconds Then Shuts OFF:Runs For Five Seconds Then Shuts OFF:Runs For Five Seconds Then Shuts OFF:

Suspect a communication problem betweenmotor, the motor control board and the ma-chine control board. Check the motor andmotor control system by removing the JP4connector on the motor control board. Setthe timer dial into the delay cycle and thenpress the push to start switch. If the motoroperates and the washer goes into a 50 rpmtumble, then the source of the problem is theRD 30 wire leading from the motor control tothe P4(2)/RD30 connector on the machinecontrol board. When the machine controltells the motor control to run the motor, itmonitors the red wire to determine if the mo-tor is actually running. If the board does notsee a return signal, the washer will shut down.

If RD30 wire is making contact, then suspectpossible problems with timer input circuits.(See the following section on Machine Op-(See the following section on Machine Op-(See the following section on Machine Op-(See the following section on Machine Op-(See the following section on Machine Op-eration Does Not Match Cycle Description): eration Does Not Match Cycle Description): eration Does Not Match Cycle Description): eration Does Not Match Cycle Description): eration Does Not Match Cycle Description):

Shuts OFF When Push-To-Start Button Re-Shuts OFF When Push-To-Start Button Re-Shuts OFF When Push-To-Start Button Re-Shuts OFF When Push-To-Start Button Re-Shuts OFF When Push-To-Start Button Re-l ea sedleasedleasedleasedleased :::::

Check for proper wiring of BK 27 to COMMand GY 26 to NO. If reversed, the washer willshut off when button is released. If wiring isproper, replace machine control board. Line

relay may be bad (See Section 1: Push-To-(See Section 1: Push-To-(See Section 1: Push-To-(See Section 1: Push-To-(See Section 1: Push-To-Start Line Relay Operation).Start Line Relay Operation).Start Line Relay Operation).Start Line Relay Operation).Start Line Relay Operation).

Washer Runs Five Minutes Then Shuts OFFWasher Runs Five Minutes Then Shuts OFFWasher Runs Five Minutes Then Shuts OFFWasher Runs Five Minutes Then Shuts OFFWasher Runs Five Minutes Then Shuts OFF :::::

During the wash cycle, the machine controlcommunicates with the timer, via the timer in-put circuits. If the machine control board doesnot see a change in timer inputs over a periodof 5 minutes, it will open the line relay and shutthe washer off. Check the timer input circuitsfor poor connections at the timer and the ma-chine control board. Replace timer if neces-sary (See Section 2: Timer Input Circuits).(See Section 2: Timer Input Circuits).(See Section 2: Timer Input Circuits).(See Section 2: Timer Input Circuits).(See Section 2: Timer Input Circuits).

Shuts OFF During Final Rinses:Shuts OFF During Final Rinses:Shuts OFF During Final Rinses:Shuts OFF During Final Rinses:Shuts OFF During Final Rinses:

The machine control board is programmed toallow a maximum continous fill time of sixminutes or an accumulated fill time of 8 min-utes for each full wash cycle. If the requiredfill time exceeds the time limit, the washer will

shut down. This is to prevent flooding in theevent there is a loose hose clamp or damagedair dome hose. Check the incoming water linesfor a minimum pressure of 20 psi. If lower,the customer can use smaller clothes loadsand reduce the pressure to 10 psi. An alterna-tive solution would be to change the plasticinlet screens to metal screened washers andremove the nozzle extender found in the wa-ter valve inlet hose near the dispener inlet.





Excessive Vibration:Excessive Vibration:Excessive Vibration:Excessive Vibration:Excessive Vibration:

Ensure that shipping bolts and straps havebeen removed from the washer. Check thelevelness of the washer and ensure the level-ing leg nuts are tightened up against the cabi-net. Check the tightness of the upper andlower weights on the outer tub. Check forloose cabinet screws. Place hand on side ofcabinet to determine if vibration noise due tocabinet flex. Apply sound dampening pad toinner cabinet wall if necessary. Check the un-balance circuit and wiring for continuity at themachine control (P2(4) to P3(1). Continuityshould be present. If not, check the wiringconnections at the strut, outer tub and interialunbalance switches. If a switch is bad or awire off, the machine control will not knowwhen an unbalance occurs. The machine con-trol board checks the state of the circuit priorto beginning the spin cycle, then monitors thecircuit throughout the cycle. If the circuit isOPEN, the board will not see “a change instate” whenever one of the normally-closedswitches is activated during an unbalancedload condit ion.

Machine Operation Does Not Match CycleMachine Operation Does Not Match CycleMachine Operation Does Not Match CycleMachine Operation Does Not Match CycleMachine Operation Does Not Match Cycle

Desc r ip t ion :Desc r ip t ion :Desc r ip t ion :Desc r ip t ion :Desc r ip t ion :

The machine control board monitors wherethe timer is in the cycle and then uses this in-formation to start different operations, suchas drain, fill, tumble and spin. Four input wiresfrom the timer to the machine control boardinform the machine control board where thetimer is in the wash cycle. However, if one ormore of these wires are making an intermittantcontact with the machine control board, the

board can be “misinformed” and will not re-spond properly.

Check the connections of the timer input wiresleading from the timer to the machine con-trol board (See Sect ion 2 : Timer Input (See Sect ion 2 : Timer Input (See Sect ion 2 : Timer Input (See Sect ion 2 : Timer Input (See Sect ion 2 : Timer Input Charts).Charts).Charts).Charts).Charts). Also, check wiring of all consoleswitches to ensure no cross-wiring of 24 VDCand 120 VAC circuits.

Tumbles Only:

When the door lock mechanism is in the"locked" mode, the wax motor has extended,forcing the latch axle to engage the door lockenable switch. This ensures the door is fullylocked and the switch can then complete thesignal back to the machine control board in-dicating the door is locked. Check connectorP3(7)/YL 36 wire to verify if the terminal ismaking good contact to the board terminal.Check the door lock enable switch for conti-nuity when the button is depressed. Replacedoor lock mechanism if necessary.

ContinuesTo Tumble After The Wash CycleIs Finished:

Check for a stuck button on the door lock en-able switch in the door lock mechanism. Youcan verify this at the machine control boardby checking for continuity across P3(7)/YL 36to P3(1)/RD23. If the door is unlocked andthere is continuity, the switch button is stuck.At the end of the wash cycle, the machine con-trol monitors the door lock enable switch fordisengagement. If the switch is stuck, thewasher will continue to tumble till the doorunlocks, even though the door is actually un-locked. Replace the door lock mechanism.

Third Rinse Cycle Is Always Cold:Third Rinse Cycle Is Always Cold:Third Rinse Cycle Is Always Cold:Third Rinse Cycle Is Always Cold:Third Rinse Cycle Is Always Cold:

If the user rotates the timer dial to the third orfourth rinse, the water will always be cold re-gardless of temperature selection. The ma-chine control board counts the number ofrinses through the wash cycle. When the thirdand fourth rinse are reached, the board will

check the rinse temperature selection forproper fill temperature (See Section 1:Water (See Section 1:Water (See Section 1:Water (See Section 1:Water (See Section 1:Water Temperature Inputs).Temperature Inputs).Temperature Inputs).Temperature Inputs).Temperature Inputs).





Door Leaks:Door Leaks:Door Leaks:Door Leaks:Door Leaks:

Usually this occurs when the door is re-mounted into the shroud and the technicianfully tightens the top hinge screw prior to in-serting the lower screw. The technician shouldfully seat the door into the shroud evenly priorto tightening the hinge bracket screw into theshroud. Check also for excess plastic flashingin the tab area of the plastic shroud. Care-fully remove the excess flash and remount theboot gasket.

“Thumping” Noise In Spin“Thumping” Noise In Spin“Thumping” Noise In Spin“Thumping” Noise In Spin“Thumping” Noise In Spin :::::

The noise could be from loose lower frontweight mounting bolts or a loose bolt secur-ing the driven pulley. Check the belt for a weakseam and replace if necessary. Check themotor adjustment bolt for tightness.

"Ticking or Knocking" Noise In Spin"Ticking or Knocking" Noise In Spin"Ticking or Knocking" Noise In Spin"Ticking or Knocking" Noise In Spin"Ticking or Knocking" Noise In Spin :::::

The noise could be from a loose wire harness,plastic purse-lock wire harness retainer onupper hose hitting the topcover or a plasticinjection mold standoff on the outer tub bear-ing housing may possibly be interfering withthe driven pulley.

Also, check the drive belt for a weak spot onthe belt. Ussually felt on the backside of thebelt as a "flat" spot. Replace the belt.

RF (Radio Frequency) Interference:RF (Radio Frequency) Interference:RF (Radio Frequency) Interference:RF (Radio Frequency) Interference:RF (Radio Frequency) Interference:

The interference could occur if the RPT shut-ter on the motor was misaligned or a motorterminal has been pushed inward sl ightly

when the motor harness connector wasplaced on the motor. Remove the motor phaseharness connector and check the motor ter-minals . Replace the motor if the motorteminals are loose.

Dispenser Does Not DispenseDispenser Does Not DispenseDispenser Does Not DispenseDispenser Does Not DispenseDispenser Does Not Dispense :::::

Examine the siphon cap to see if the cap wastwisted, causing the cap to seal the siphontube against the bottom of the siphon cup. Re-position cap to lift the siphon tube off the bot-tom of the cup. The wax motors are activateda full 30 seconds prior to turning on the watervalves. If the timing is not correct, suspect abad wiring connection. Also, examine the link-age of the acutuator arm and proper locationof the spring on the wax motor (See Section (See Section (See Section (See Section (See Section 6: Water Carrying Components).6: Water Carrying Components).6: Water Carrying Components).6: Water Carrying Components).6: Water Carrying Components).

Clothes Wet:Clothes Wet:Clothes Wet:Clothes Wet:Clothes Wet:

Possibly due to the washer shutting down toosoon or execessive suds present. Did the timeradvance to OFF? If yes, then excessive sudsmay be the cause or the intertial unbalanceswitch tripped too soon, resulting in lower spinspeeds. Change the inertial switch if suds werenot detected. Note:Note:Note:Note:Note: If the timer motor is en-If the timer motor is en-If the timer motor is en-If the timer motor is en-If the timer motor is en-ergized for five minutes without the cycle in-ergized for five minutes without the cycle in-ergized for five minutes without the cycle in-ergized for five minutes without the cycle in-ergized for five minutes without the cycle in-puts changing, the machine control board will puts changing, the machine control board will puts changing, the machine control board will puts changing, the machine control board will puts changing, the machine control board will drop the line voltage relay.drop the line voltage relay.drop the line voltage relay.drop the line voltage relay.drop the line voltage relay.





T R O U B L E S H O O T I N GT R O U B L E S H O O T I N GT R O U B L E S H O O T I N GT R O U B L E S H O O T I N GT R O U B L E S H O O T I N G























1 6 0 0 8 3 7 3 - 0 1 SECTION 3. TROUBLESHOOTING3 - 1 03 - 1 03 - 1 03 - 1 03 - 1 0

















Use a knife or scissors to cut across the + in the center of the dial and press the template overthe timer shaft. Align the template with the OFF indicators of the Quick Wash and Regular washon the facia. Press the timer knob onto the timer shaft.





Energy UsageEnergy UsageEnergy UsageEnergy UsageEnergy Usage :::::The energy usage averages up to 0.10 Kwh per cycle, when using the Regular cycle with Nor-mal wash. Peak amperage is 7.5 amps during acceleration to high speed spin, with nominalrunning amperage at a maximum of 5.0 amps.

Washer WattagesWasher WattagesWasher WattagesWasher WattagesWasher Wattages :::::The following wattages are approximate and without clothes:

F u n c t i o n :F u n c t i o n :F u n c t i o n :F u n c t i o n :F u n c t i o n : Wattages:Wattages:Wattages:Wattages:Wattages:D e l a y 10-15Tumbling (empty) & water fill 50-70Tumbling (Full-Wash level) 110-120Tumbling (Full-Rinse Level) 140-150

Draining (No tumble) with water 45-50Dra in ing (No tumble) no water 30-35Spinning (100 rpm) 85-90Spin Accelerat ion (100-200 rpm) 130-150Spinning (400 rpm) 160-170Spinning (850 rpm) 400-410

MISCELLANEOUS INFORMATIONMISCELLANEOUS INFORMATIONMISCELLANEOUS INFORMATIONMISCELLANEOUS INFORMATIONMISCELLANEOUS INFORMATION


http://slidepdf.com/reader/full/maytag-neptune-manule-service 49/157© 1998 Maytag Corporation1 6 0 0 8 3 7 3 - 0 1 SECTION 4. CONSOLE 4 - 14 - 14 - 14 - 14 - 1

SECTION 4. CONSOLESECTION 4. CONSOLESECTION 4. CONSOLESECTION 4. CONSOLESECTION 4. CONSOLE

R E M O V A LR E M O V A LR E M O V A LR E M O V A LR E M O V A L

1 . Disconnect power to the unit.Disconnect power to the unit.Disconnect power to the unit.Disconnect power to the unit.Disconnect power to the unit.

2 . Remove the three screws securing the con-sole rear cover plate across the rear topedge of the console (Figure 4-1) (Figure 4-1) (Figure 4-1) (Figure 4-1) (Figure 4-1) .....

3 . Lay a drop cloth across the top cover of thewasher.

4 . Grasp the top of the console and gently rockthe top forward ( Figure 4-2 Figure 4-2 Figure 4-2 Figure 4-2 Figure 4-2).

Warning Warning Warning Warning Warning - Always shut off- Always shut off- Always shut off- Always shut off- Always shut offelectrical power to the unitelectrical power to the unitelectrical power to the unitelectrical power to the unitelectrical power to the unitbefore beginning any servicebefore beginning any servicebefore beginning any servicebefore beginning any servicebefore beginning any service

p rocedu re .p rocedu re .p rocedu re .p rocedu re .p rocedu re .





C o n s o l eC o n s o l eC o n s o l eC o n s o l eC o n s o l eM o u n t i n gM o u n t i n gM o u n t i n gM o u n t i n gM o u n t i n g

S c r e w sS c r e w sS c r e w sS c r e w sS c r e w s

5 . Push the bottom of the console towardthe back panel to disengage the six lock-ing feet from the top cover (Figure 4-3) (Figure 4-3) (Figure 4-3) (Figure 4-3) (Figure 4-3) .

6 . Carefully lift and roll the console forwardonto the top cover. You now have accessto the console components and wiring(Figure 4-4).(Figure 4-4).(Figure 4-4).(Figure 4-4).(Figure 4-4).

7 . To Reinstall:To Reinstall:To Reinstall:To Reinstall:To Reinstall: Roll the console back intoan upright position, engaging the lockingfeet into the slots in the top cover. Re-place the three screws to attach consoleback to rear panel.




Depress the tab at the top of the switch with

a screwdriver to disengage the tab from theconsole. Pivot the switch away from theconsole to remove (Figure 4-5) (Figure 4-5) (Figure 4-5) (Figure 4-5) (Figure 4-5) .

R E P L A C E M E N TR E P L A C E M E N TR E P L A C E M E N TR E P L A C E M E N TR E P L A C E M E N T

Align the rib on the bottom of the switch withthe slot in the console. Pivot the switch upinto the console until the tab engages theconsole securely. Check that the locating tabson either side of the switch's lower alignment

rib are in position to properly center and lockthe switch into the lower part of the switcho p e n i n g .

VERTICAL SWITCHESVERTICAL SWITCHESVERTICAL SWITCHESVERTICAL SWITCHESVERTICAL SWITCHES(Push Button)(Push Button)(Push Button)(Push Button)(Push Button)

HORIZONTAL SWITCHESHORIZONTAL SWITCHESHORIZONTAL SWITCHESHORIZONTAL SWITCHESHORIZONTAL SWITCHES(Push-to-Start)(Push-to-Start)(Push-to-Start)(Push-to-Start)(Push-to-Start)

Locking Tab

Locking Tab

Locking TabScrewdr iver

Locking Tab

Carefully DepressCarefully DepressCarefully DepressCarefully DepressCarefully DepressLocking Tab onLocking Tab onLocking Tab onLocking Tab onLocking Tab on

Switch to DisengageSwitch to DisengageSwitch to DisengageSwitch to DisengageSwitch to DisengageFrom ConsoleFrom ConsoleFrom ConsoleFrom ConsoleFrom Console

Figure 4-6 Figure 4-6 Figure 4-6 Figure 4-6 Figure 4-6 Figure 4-5 Figure 4-5 Figure 4-5 Figure 4-5 Figure 4-5

Align the Center RibAlign the Center RibAlign the Center RibAlign the Center RibAlign the Center Ribon the bottom of theon the bottom of theon the bottom of theon the bottom of theon the bottom of theSwitch with the Slot inSwitch with the Slot inSwitch with the Slot inSwitch with the Slot inSwitch with the Slot inthe Cup on the Bottomthe Cup on the Bottomthe Cup on the Bottomthe Cup on the Bottomthe Cup on the Bottomof the Switch Openingof the Switch Openingof the Switch Openingof the Switch Openingof the Switch Openingon the Consoleon the Consoleon the Consoleon the Consoleon the Console

Pivoting thePivoting thePivoting thePivoting thePivoting theSwitch Body, LockSwitch Body, LockSwitch Body, LockSwitch Body, LockSwitch Body, Lockit in at the Top ofit in at the Top ofit in at the Top ofit in at the Top ofit in at the Top ofthe Openingthe Openingthe Openingthe Openingthe Openingon the Console.on the Console.on the Console.on the Console.on the Console.


Depress the locking tab on the switch to

disengage i t from the locking tab on theconsole. Pivot the switch from the console(Figure 4-6).(Figure 4-6).(Figure 4-6).(Figure 4-6).(Figure 4-6).


Position one side into the console and pivotthe other tab into the console and apply enoughpressure to engage the tab into the console.




2 . Carefully lift the timer knob and dial offthe timer shaft by pulling the knob awayfrom the face of the control console(Figure 4-7).(Figure 4-7).(Figure 4-7).(Figure 4-7).(Figure 4-7).

3 . Disengage the console assembly fromthe top cover and roll forward (See (See (See (See (See Console Removal) Console Removal) Console Removal) Console Removal) Console Removal) .

4. Remove t imer mounting screw on backof timer in the console.

5 . Slightly lift the locking tab on the back ofthe timer (Figure 4-8).(Figure 4-8).(Figure 4-8).(Figure 4-8).(Figure 4-8).

6 . With the locking tab lifted, slide the timerbody toward the end cap of the console.This will disengage the retaining tabs ofthe timer from the slots in the console.

7 . Lift the timer away from the console.Figure 4-8 Figure 4-8 Figure 4-8 Figure 4-8 Figure 4-8

TIMER REMOVALTIMER REMOVALTIMER REMOVALTIMER REMOVALTIMER REMOVAL



1 . Align the three tabs of the timer into theslots of the console.

2 . Insert the timer into the slots andslightly lift the locking tab of the timer.Slide the timer away from the endcapuntil the locking tab can engage with thesquare hole in the console.

3 . R ep la ce m ou nt in g sc re w.






16008373-01 SECTION 5. CABINET ASSEMBLY 5-1

SECTION 5. CABINET ASSEMBLY

Warning - Always shut offelectrical power to the unit

before beginning any ser-vice repair procedures.

DOOR ASSEMBLY & HINGES

The door assembly is reversible. It containsan inertial vibration damper comprised of asteel plate suspended with springs. Thedamper is designed to tune out excessive vi-brations generated by the machine during thespin cycle. Replacement inner door liners areshipped with the vibration damper in place.

R E M O VA L

1. Open the door and remove the centerscrew of each hinge secured to the innerflange of the front panel in the dooropening.

2. Grasp the door with both hands and liftthe hinge area slightly. Draw the door as-sembly away from the machine. This willdisengage the hinges from the slots in thefront shroud (Figure 5-1). If the hingesbind, press out on the plastic shroud nearthe hinge toward the cabinet.

Figure 5-1

REVERSAL

1. Repeat the above steps and, remove thecorresponding sheet metal spacers on theopposite side.

2. Remove the hinges from the door and re-locate them to the other side of the door.

3. Remount the door into the new slots andsecure with one screw into each hinge.

4. Mount the sheet metal spacers onto theside where the hinges were previously tocover the hinge slots in the front shroud.

DISASSEMBLY

1. Remove ten screws located across the bot-tom and along either side of the doorpanel. The top edge of the outer panel isfolded over the inner door plug.

2. With the outer door panel removed, thestabilizer is exposed and is attached to theinner door plug.





Cabinet Vibration Absorber

The purpose of the cabinet vibration absorberis to provide a dampening effect to the washerduring the spin cycle. By dampening themachine vibration, the washer is able to main-

tain and achieve optimum spin performance.The stabilizer is attached to the inner door plugwith two screws.

Figure 5-2

Door Latch Hoop

Cabinet Vibration Absorber

Inner Door Liner

4. To remove the front panel, open the door,twist the upper right and left panel exten-sions inward by pressing in on the outerupper edges of the front panel posts. Thiswill disengage the front panel posts fromclips located on the face of the cabinetflange (Figure 5-4) .

5. Tilt the top of the front panel away fromthe washer. Then, remove the front panel(Figure 5-4) .

Figure 5-4

FRONT PANEL

R E M O VA L

1. Disconnect power to the unit.

2. Open the door and remove the four screwsalong the inside lip of the door opening.The two that are located vertically, on ei-ther side of the door opening, secure thefront panel to the front shroud assembly(Figure 5-3) . Care should be taken whenopening and closing the door with thescrews removed.

3. Remove the door.

Figure 5-3

Door Latch Hoop

The door latch hoop is snapped into the doorliner. A spring retains the hoop in the properposition to align with the door lock mecha-nism when the door is closed. A plastic sup-port is snapped into place over the latch hoop

at add strength (Figure 5-2).





DOOR LOCK MECHANISM

The purpose of the door lock mechanism isto secure the door during the spin cycle.When the door is shut, the wire loop on thedoor engages the rotating gear in the door

lock mechanism (Figure 5-7) . When theproper water level is reached and the pres-sure switch is satisfied, 120 VAC is applied tothe wax motor. The piston in the wax motorwill extend, pushing the latch axle and slidinggear from left to right. Teeth on the face ofthe sliding gear will intermesh with the teethon the side of the rotating gear (normally takesabout 45-60 seconds). This interlocking ofteeth provides the locking action of the lockmechanism.

At the end of the spin cycle, when tumblerspeed drops below 90 RPM, voltage is nolonger applied to the wax motor. The waxmotor will cool and relax the piston on thewax motor. The latch axle and sliding gearare then pulled from right to left, disengagingthe teeth of the sliding gear from the rotatinggear (normally takes 1 - 1½ minutes). This al-lows the rotating gear to be in a position torotate if necessary, should the door beopened.

TOP COVER

R E M O VA L

1. Remove the front panel (See Front PanelRemoval) .

2. Remove the four screws fastening the dis-penser bezel to the top of the top cover(See Dispenser Assembly) .

3. Remove two 5/16" hex head screws secur-ing the two hold down brackets on the topcover (Figure 5-5) .

4. To remove the hold down brackets, swingthe bracket to the outside to unhook the

bracket from the slot in the top cover lip(Figure 5-6) .

5. If the door is still positioned on the frontshroud, open the door prior to lifting thefront of the top cover and tilt the top covertoward the rear of the machine.

Figure 5-5 Figure 5-6

Figure 5-7

AccessoryCable

Wax Motor

Axle Spring

Latch Axle

RampDoor Switch

Cover

Door LockSwitch

LatchSwitchHolder

LampHolder

SlidingGear

Spring

RotatingGear

Gear ReturnSpring

Bulb





FRONT SHROUD ASSEMBLY

The shroud assembly ties the sides of thecabinet together across the front for stabil-ity and provides support for mounting of thedoor assembly, front panel and door lockmechanism. To gain access to componentsbehind the front shroud, the assembly canbe removed as a whole assembly and liftedonto the top of the washer. This will allowaccess to the tub cover, spin basket, sumparea and etc..

R E M O VA L

1. Remove the front panel and raise the topcover to expose the front shroud assem-bly (See Front Panel & Top Cover).

2. With the door open, unsnap the boot gas-ket from around the inside perimeter ofthe door opening by pulling out on the

sealing lip of the gasket (Figure 5-9).

Two switches in the door lock mechanism in-form the machine microprocessor controlwhen the door is latched shut and when thedoor is securely locked. For more informa-tion, refer to section on Electrical-MechanicalTroubleshooting.

An emergency access cord (filament) is at-tached to the sliding gear, should the waxmotor fail in the extended position and entryinto the washer is necessary. To gain accessto the cable, removal of the dispenser bezel isnecessary. Once removed, the cable is ex-posed. By carefully applying both a steadypull of the access cord and opening force tothe door, the wax motor is overridden and thesliding gear is pulled from right to left awayfrom engagement with the rotating gear.Thus, allowing the rotating gear to release thewire loop of the door.

NOTE: When the cord is released, the lock will return to a locked position (Figure 5-8).

Figure 5-8

R E M O VA L

1. Remove the front panel and raise the top

cover to expose the door lock mechanism(See Front Panel & Top Cover).

2. Remove the wires from the lock switches,wax motor and light fixture.

3. Remove light.

4. Remove two 5/16" hex-head screws secur-ing the switch support to the metal shroudsupport (Figure 5-8).

Emergency Access Cord

Mounting Screws





3. Remove the door (See Door Assembly and Hinge Removal).

4. Removal and replacement of the screws

in the following order, as illustrated, is nec-essary to provide proper alignment of theparts. Failure to do so will hinder removaland replacement of the shroud onto thecabinet (Figure 5-10) .

5. Place a soft cloth over the top of the con-

crete weight. Carefully lift and stand theshroud assembly on top of the tub. Theassembly can lean back against the topcover. The wire harness on the left side ofthe upper cabinet is long enough to do this.When replacing the shroud, be sure to tuckthe harness inside the upper flange of thetop cover to keep the wires from beingpinched and damaged.

Figure 5-9

Figure 5-10

CABINET ASSEMBLY w/REARACCESS PANEL

Removal of the access panel gains access tothe rear components of the washer(Figure 5-11) .

Figure 5-12

R E M O VA L

Remove the four hex-head screws surround-ing the access panel (Figure 5-12) .

Figure 5-11

Spacer

Screws

Access Panel








16008373-01 SECTION 6. WATER CARRYING COMPONENTS 6-1

SECTION 6. WATER-CARRYING COMPONENTS



5. While pulling the bracket away from thecabinet, rotate the left side of the bracketaway from the washer.

6. Remove the wire harness from the watervalve coils (Blue & White wires - Cold; Or-ange & White wires - Hot) and remove theclamp from the injector hose.

7. Remove two 5/16" hex head screws secur-ing the valve to the mounting bracket.

FRONT REMOVAL


2. Shut off the water supply to the inlet hoses.

3. Remove the front panel.

4. Remove dispenser bezel and raise the topcover to expose the upper rear cabinet area(See Front Panel & Top Cover Removal).

5. Remove the wire harness from the water

valve coils (blue & white wires - cold; or-ange & white wires - hot) and remove theclamp from the injector hose. When thevalve is replaced, the hot water valve coilis on the left.

6. Remove the two 5/16" hex head screws se-curing the water valve bracket to thecabinet.

7. Carefully lift the valve and direct the inlethoses through the openings in the rearmounting bracket.

8. Remove the inlet hoses from the watervalve connections. If possible, clamp thehoses shut and/or have a towel handy incase of overspray when water pressure isrelieved.

MountingScrews

InjectorHose

MountingBracket

Mounting Screws

WaterValve

WATER VALVE

The water valve is accessible from the frontor rear of the machine.

REAR REMOVAL


2. Shut off the water to the inlet hoses andremove the hoses from the water valveconnections of the washer.

3. Remove the two ¼" hex head screws se-curing the water valve bracket to the cabi-net (Figure 6-1).

4. While pulling the lower end of the bracketdown slightly, slide the bracket to the left.This will allow the injector hose to clearthe rear cabinet opening.

Figure 6-1





AIR DOME HOSE

The air dome hose connects the pressureswitch to the air dome located in the sumparea of the outer tub. Routing of the air domehose passes from the console down the rearwall of the cabinet to the rear sump area ofthe outer tub. Two holding clips retain the airdome hose to the cabinet away from the beltand pulley.

REMOVAL FROM CONSOLE


2. Remove the console (See ConsoleRemoval).

3. Slide the pressure switch up on the mount-ing bracket, away from the air dome hose.The mounting bracket for the pressure

switch is secured to the rear panel of theconsole (See Figure 6-2).

4. Pull the air dome hose down through thetop cover opening.

REMOVAL FROM OUTER TUB


2. From behind the outer tub, slide off the

retainer clip securing the air dome hoseto the rear spout of the outer tub.

3. Remove one of the rear baffles.

4. Grasp and lift the airdome hose from thesump area (See Figure 6-3).

R E M O VA L


2. Remove the console (See ConsoleRemoval) .

3. Slide the pressure switch up, away fromthe air dome hose.

4. Remove wire harness from the pressureswitch.

5. Rotate the pressure switch 90 degrees todisengage locking tabs on the back of theswitch from the mounting bracket.

6. The mounting bracket for the pressureswitch is secured to the rear console panelwith one screw.

7. To replace, insert air dome hose into thebracket. Insert the pressure switch nippleinto the air dome hose. Press the pres-sure switch into the bracket until it "snaps"into place.

WATER LEVEL PRESSURESWITCH

The water pressure switch is located in theconsole area and mounted to a galvanizedbracket secured to the rear panel of the con-sole. The air dome hose is inserted into thelower end of the mounting bracket (Figure6-2) . The nipple of the pressure switch is in-serted into the end of the air dome hose whichis secured by the lower mounting bracket.

Figure 6-2

PressureSwitch

BracketA) SlideSwitch Off

B) RotateSwitch

Air DomeHose





5. Pull the air dome and hose out through thesump opening in the spin basket (Figure6-3).

REPLACEMENT/ROUTING

1. Thread the narrow end of the hose throughthe air dome outlet in the rear of the outertub (Figure 6-3). Apply alcohol to lubri-cate the hose to ease insertion into theouter tub air dome outlet.

NOTE: Using soap and water may lead to apotential leak.

2. Secure the retainer clip on the outsideridge of the air dome hose.

3. Push the bent end of the air dome downinto the sump area, below the spin basket,making sure the flat rubber tab on the airdome is down inside the drain sumpopening.

4. The air dome hose is retained to therear wall of the cabinet with two clips.

NOTE: A silver indicator mark is located approximately 20 inches away from the air dome. The indicator mark must be located under the lower clip to allow the correctamount of slack in the hose.

DISPENSER ASSEMBLY

The dispenser assembly is located in the lefthand side of the top cover. Three bays dis-pense the fabric softener, bleach and deter-gent into the wash load. A double wax motormechanism directs the flow of water into each

specific bay when required for disbursementinto the wash load. When a specific fluid isrequired, the water is directed into that bay.

As water fills the bay, the fluid level rises.When the fluid reaches a specific height, it issiphoned out into the dispenser injector hoseto the wash load.

Spin Basket

S u m pOpeningExposed

RearBaffleRemoved

Air DomeOutlet

Figure 6-4

Figure 6-3

5. Remove all slack in the hose between theupper and lower clips holding the air domehose. This reduces the potential for noise.

6. Route the air dome hose into the centerrear hole in the top cover. Route towardthe pressure switch and secure the hoseto the pressure switch.

Siphon Cap

Siphon Cup

Dispenser Bottom

Wax Motors

Linkage

RotaryNozzle

DispenserTop

R E M O VA L


2. Remove the siphon cup and cap.

3. Remove the four screws securing the dis-penser bezel and assembly to the topcover.





FRONT WATER FLUME INJECTOR

R E M O VA L


2. Remove the front panel and raise the topcover to expose the upper frontcabinet area (See Front Panel & Top Cover Removal).

3. Remove the front shroud assembly (SeeFront Shroud Assembly Removal) .

4. Remove the outer tub cover (See Outer Tub Cover Removal).

PUMP ASSEMBLY

The pump assembly is mounted to the right

rear area of the base.

R E M O VA L


2. Spread a towel below the drain hoses priorto loosening the hose clamps. This willcatch any residual water left in the hosesand sump area.

3. Remove the hose clamps and hoses fromthe pump.

4. Remove the wiring harness from the pumpmotor terminals.

5. Rotate the pump assembly in a counter-clockwise direction. The support legs ofthe pump are slotted to engage in keyedslots in the base. Reverse the steps to re-mount the pump.

As water is filling the dispenser assembly,water is also diverted to a hose leading to thefront of the outer tub.

As the water entersthe top of the outertub through the hose,it passes through awater flume. Theflume directs the wa-ter toward the front ofthe tub to saturate the

clothes load.

Figure 6-5

4. Remove the front panel and top cover (SeeFront Panel & Top Cover Removal).

5. Disconnect the hoses attached to the dis-penser assembly.

6. While lifting, rotate the dispenser assem-bly 90 degrees in a counterclockwisedirection.

NOTE: The two tabs on the side wall of thedispenser bottom may break off if the above

procedure is not followed properly.

5. Remove the hose clamp and injector hosefrom the spout on the front upper area ofthe outer tub.

6. In order to provide sufficient space to re-move the injector, place a 5/8" - 3/4" wedgebetween the spinner and the outer tub.

7. Pinch the two tabs exposed on the outeredge of the outer tub spout and press theinjector into the tub. Reverse the previ-ous steps to replace the injector.





CLEANING THE PUMP

The pump assembly can also be disassembledwithout removing the hoses from the pump(See Figure 6-6).

1. Depress the locking tab on the face of thepump housing.

2. Rotate the block portion of the pump con-taining the motor windings toward thefront of the washer. This will disengagethe locking tabs of the pump housing fromthe pump face.

3. Carefully remove the pump body awayfrom the housing. The drain impeller isexposed for cleaning.

Pump Accessory Kit


2. Disconnect the drain hose from the exist-ing pump in the washer.

3. Attach the accessory connector to thepump drain outlet and secure with theclamp found in the kit.

4. Position the second pump near the firstpump and connect the accessory connec-tor to the sump intake of the second pump.Secure with the clamp in the kit.

5. Connect the drain hose to the drain outletof the second pump. Secure with a clamp.

6. The second pump assembly is not securedto the washer's base frame.

7. Installation is complete.

Figure 6-6 Figure 6-7

Figure 6-8





Figure 6-9

Drain HoseAccessCover

Figure 6-10

Drain HoseClamp

DRAIN HOSE

The drain hose attaches to the pump and isrouted through the lower rear wall of the cabi-net. The drain hose is protected externally bya shield.

R E M O VA L


2. Remove the four ¼" hex head screws se-curing the access panel to the rear wall ofthe cabinet.

3. Remove the ¼" hex head screw securingthe drain hose shield. Remove shield.

4. With access into the machine compart-ment, spread a towel under the connec-tion of the drain hose to the pump. Loosenthe clamp and remove the drain hose (Fig-ure 6-10).

5. Reverse the previous steps forreplacement.








16008373-01 SECTION 7. OUTER TUB & SPINNER ASSEMBLY 7-1

SECTION 7. OUTER TUB & SPINNER ASSEMBLY



DOOR BOOT

The door boot rubber gasket provides a seal

between the outer tub assembly and the frontshroud. The boot seal is secured to the frontshroud by locking tabs on the boot seal, whichengage with slots in the shroud. Attachmentto the outer tub is by a wire loop stretchedaround the perimeter of the opening in theouter tub cover and secured with a spring.

R E M O VA L


2. Remove the front panel, top cover andfront shroud (See Front Panel, Top and Front Shroud Removal).

3. Using one of the two hold down brackets(See Figure 5-6) or one of the two frontsupport springs, grasp the hook of the bootclamp spring. With the other hand, pressthe wire loop into the door boot. This willbrake the wire into the door boot and not

allow the wire to slip.

NOTE: Be careful not to bend or crease thewire loop. If the wire loop becomes bent, theresult will be a potential leak upon replace-

ment of the boot seal onto the outer tubcover.

4. Pull the boot clamp spring hook towardthe wire loop and disengage the springfrom the wire loop.

5. Carefully remove the wire loop from thelip of the outer tub cover.

NOTE: Note the orientation ribs on the outer tub cover and the locating notches in the door boot seal lip.

Figure 7-1

LockingTabs Boot

Gasket

Do o r S h r o u d

BAFFLES

The baffles in the spin basket distribute andredistribute the clothes during the tumblingaction of the washer.

R E M O VA L


2. The three rear baffles within the spin bas-ket are removed by removing the twocrosshead screws securing each bafflefrom inside the spin basket.

3. The three front baffles within the spin bas-ket are removed by removing the two ¼"hex head screws from outside of the spinbasket. To gain access, remove the outertub cover. The front baffle mountingscrews can now be reached through thesump area, using a flat ratchet with a ¼"drive socket.





6. Unsnap the locking tabs of the door bootaround the inside perimeter of the doorshroud (Figure 7-1).

REPLACEMENT

1. Align the door boot with the D-shape to-ward the front, with the flat of the D to-ward the bottom. Also, locate the largetab toward the top center of the shroud.

2. Stretch the rear lip of the door boot ontothe tub cover.

3. Move the rear door boot lip along the faceof the tub cover until the locator notchesin the door boot align with the locator ribsin the tub cover. Check alignment of thesix rib marks and reposition if necessary.This is necessary in order to have the lock-ing tabs on the inside perimeter of the doorboot align with the corresponding tabs onthe front shroud.

4. Carefully loop the wire loop with springaround the lip of the outer tub cover andplace the spring at the 11:00 o'clock posi-tion, just left of the top rib of the outer tubcover. Hook the end of the spring over thenearest tub cover clip to hold the springand wire in position for final hookup to theother end of the wire loop.

5. Using either the hold down bracket or theouter tub spring, grasp the hook end ofthe spring and apply pressure on theclamp wire into the door boot.

6. Pull the spring hook toward the wire loopto engage the spring with the wire loop.

NOTE: Be careful not to bend or crease thewire loop. If the wire loop becomes bent, theresult will be a potential leak upon replace-

ment of the boot seal onto the outer tubcover.

OUTER TUB COVER

The outer tub cover has a gasket seal em-bedded in the outer flange of the cover toseal the cover to the outer tub. The cover issecured to the outer tub by means of twelve(12) locking clips evenly spaced around the

perimeter of the cover. When the outer tubcover is removed, access to the sump areaand the front injector flume is possible.

R E M O VA L


2. Remove the front panel, top cover andfront shroud (See Front Panel, Top Cover, and Front Shroud Removal).

3. Using a flathead screwdriver, slide un-der the clip and pry to remove. Removethe remaining clips from the outer tubcover.

4. Remove the cover from the outer tub.This exposes the sump area on the floorof the outer tub and the water injectorflume on top of the outer tub.

7. Reposition the front shroud on the frontof the washer and secure (See FrontShroud).

8. Pull the front edge of the door boot andlocate the widest locking tabs, locatedat the 12, 4 & 8 o'clock positions. Insertthe locking tabs into the large interlock-ing slots in the shroud. (Spraying thesurface with window cleaner or a soapsolution aids reinsertion of the tabs intothe plastic front shroud.) Press the thickrubber section of the door boot into thegroove in the shroud so the locking tabsengage in the slots.

9. Press the remaining locking tabs into theperimeter of the shroud.





SPIN BASKET ASSEMBLY w/BALANCE RING

The balance ring is securely fastened to thespin basket and cannot be obtained as a sepa-rate repair part. To obtain, order completespin basket assembly. The balance ring isfilled with a calcium chloride solution andbaffles.

Figure 7-3

Figure 7-4

Figure 7-2

R E M O VA L


2. Remove the front panel, top cover, frontshroud, outer tub cover and rear baffles(See Front Panel, Top cover, Front Shroud,Outer Tub Cover and Rear BaffleRemoval).

3. To separate the spinner tub support fromthe spinner, remove the three rear baffleswithin the spin basket by removing the twoscrews securing each baffle (See BaffleRemoval) .

4. Remove the three locking type nuts (½"socket) securing the spin basket to the spi-der assembly (Figure 7-5).

within the ring allow the fluid to dispersewithin the ring evenly. By rotating the spinbasket, you can hear the fluid dispersingwithin the baffles of the balance ring. Thissound is normal.

The spin basket is mounted to the spinner sup-port by means of threaded studs on the sup-port extending through the spin basket andsecured with nuts. The mounting nuts areconcealed under the rear baffles (Figure 7-4).





DRIVE PULLEY

The drive pulley can be accessed via the rearaccess panel of the washer. The pulley is se-cured to the shaft of the spider assembly by abolt. The direction of pulley rotation controls

the spin action of the spin basket.


2. Remove the rear access panel from thewasher to access the pulley area.

3. Remove the bolt and the spider shaft willbe exposed. Carefully slide the pulley offthe spider shaft, using a "rocking/side-to-side" motion. If the pulley has a snug fit,

use your Spanner Wrench to apply enoughleverage to pry the pulley off the shaft(Figure 7-6).

Figure 7-6

REPLACEMENT

1. Slide pulley on shaft.

2. Insert new tabbed washer and secure thebolt with a 9/16" socketed ratchet wrench(30 in. lbs. torque).

NOTE: If the washer is cupped, flip thewasher on the pulley so the cupped portionextends away from the shaft. Failure to doso can result in a binding of the spinner sup-

port shaft and seals .

SpinnerSupport

Washer

Locking Nut

5. Remove the spin basket by lifting it off thethreaded bolts of the spinner support.

6. When replacing the spin basket onto thespinner support, replace the washers un-der the three locking type nuts. Secure

the ½" nuts firmly (18 in. lbs. torque).

Figure 7-5

Profile Washer





SPINNER TUB SUPPORT

The spinner tub support attaches to the spin basket and the shaft of the spider extends througha seal system to the exterior of the outer tub with a pulley attached to the end of the shaft( Figure 7-7 ) . This assembly supports the spin basket and transfers the rotation of the drivepulley directly to the rotation of the spin basket.

NOTE: When the spinner tub support is removed, the shaft seal system should be replaced.

Figure 7-7

SpinBasket

R E M O VA L


2. Remove the front panel, top cover, front shroud and outer tub cover (See Front Panel, Top Cover, Front Shroud and Outer Tub Cover Removal) .

3. Remove the drive pulley (See Pulley Removal).

4. With the pulley removed, the spin basket with the spider shaft can be pulled from the frontof the outer tub assembly.

5. To separate the spinner tub support from the spinner, remove the three rear baffles withinthe spin basket by removing the two screws securing each baffle (See Baffle Removal).

6. Remove the three locking nuts (½" socket) securing the spin basket to the spider assembly.

7. Remove the shaft seal (Figure 7-8).

REPLACEMENT

1. Reverse the previous steps.

2. IMPORTANT: Secure the three locking nuts (½" socket) on the spinner tub support studs(18 in. lbs. torque).

(See Figure 7-5)

Plastic Washer Seal

SpacerSleeve

SpinnerSupport





SEAL SYSTEM

A multi-lipped water seal is positioned on thetub support shaft leading to the outer tub bear-ing. This prevents water inside the tub fromreaching the bearings. The water seal is ac-cessed by removing the tub support shaft. Itis comprised of a stainless steel seal face po-sitioned on the tub support shaft, which mateswith a rubber gasket. Grease on the face ofthe rubber gasket provides lubricant for thesteel seal face. The steel seal face providesthe rotating seal surface against the circularrubber ribs in the face of the rubber seal. Thismakes for three rib contacts at various diam-eters, providing three seals.

R E M O VA L


2. Remove the spinner tub support with spin-ner (See Spinner Tub Support Removal).

3. With a flathead screwdriver, pry the sealcarefully off the tub support shaft (Figure7-8).

4. Reach inside the outer tub bearing areaand remove the rubber seal. Discard boththe steel seal washer and the rubber seal(Figure 7-9).

5. Position the spacer, replacement rubberseal and steel seal washer into the outertub bearing area.

6. Position the spinner with spinner supportshaft into the outer tub and insert the shaftthrough the seal in the rear of the outertub until the spinner support shaft seats

into place.

7. Reposition the drive pulley with tabbedwasher onto the spinner support shaft.Insert the retaining bolt and tighten se-curely (30 in. lbs. torque). This will drawthe shaft and seals into proper alignment.

Figure 7-9

Figure 7-8





Upper Weight

REMOVAL OF LOWER FRONT WEIGHT

1. Remove the front panel (See Front Panel).

2. Remove the two bolts securing the weightto the outer tub assembly. Use a 9/16"socket (Figure 7-12) .

3. Lower the front weight and guard againsthitting the motor control microprocessorboard mounted to the base assembly.

REMOVAL OF UPPER WEIGHT


2. Lift top cover (See Top Cover).

3. Remove the two ½" counter balance boltssecuring the weight to the top of the outertub assembly.

NOTE: The bolts screw into two nuts below the weight, under the tub mounting pad (Fig-ure 7-11).

OUTER TUB ASSEMBLY

The outer tub assembly is suspended from twosprings positioned toward the upper front ofthe cabinet and supported in the rear by twostruts which are secured to the base frame.

Two counter weights are mounted to the outertub from above and below the tub. The alu-minum bearing housing retains both inner andouter bearings for the spinner tub supportshafts.

BEARINGS

The bearings are not repairable or replaceable.Replacement of the complete outer tub as-sembly is required.

COUNTER WEIGHTS

Two counter weights are secured to the outertub assembly. One is secured to the top ofthe tub assembly and the other is secured tothe bottom of the tub assembly.

Figure 7-11

Figure 7-10

Front Water

Flume

DisplacementSwitch

Figure 7-12

CounterBalanceBolt

Upper Weight

Nut

Counter BalanceBolt

Front Weight

Strap





STRUT ASSEMBLY

Two struts are mounted to the base and in-serted into rubber isolators in the rear of theouter tub assembly. The struts provide sus-pension support to the outer tub assembly.

R E M O VA L


2. Remove the front panel, top cover andfront shroud (See Front Panel, Top Cover and Front Shroud Removal).

3. Disconnect dispenser hoses and injectorhose connections to the outer tub.

4. Lean the cabinet forward to access the twolocking nuts that secure the struts to thebottom of the base frame assembly. Usean 8mm or ½" socket. Remove the lock-ing nuts and lower strut washers.

5. With the washer standing upright, roll thewasher forward and off the struts, whichmount into the rubber isolators insertedinto the rear of the outer tub.

6. To Reinstall: Reverse the previous steps.

Isolator

Locking NutLower Strut Washer

Rear Strut

Push Rod

IsolatorStrut

Figure 7-13

Strut Displacement Switch


2. Remove the rear access panel for imme-diate access or remove the front panel.

3. Remove the wires to the switch.

4. Release the small locking tab on top of theswitch and rotate the switch to disengagethe switch from the strut.

5. To Reinstall: Reverse the aforementionedsteps.

INERTIAL UNBALANCE SWITCH

The purpose of the switch is to monitor thelateral horizontal movement of the outer tubduring spin (above 500 RPM), versus the ver-tical movement. When a severe amount ofmotion is detected, the machine control willimplement a reduction in speed or start a re-

distribution of the clothes load. This is doneby gradually stopping the motor. After themotor stops, the tumbler will alternatelytumble, first in one direction then another. Af-ter a brief time, the machine will again workup to a full spin. Should the machine detectanother unbalance, the control will implementanother redistribution of the load.





R E M O VA L


2. Remove the front panel and lift the topcover (See Front Panel & Top Cover Removal) .

3. The switch is located on the upper righthand side of the outer tub assembly (Fig-ure 7-14).

4. Remove the two screws securing theswitch to the outer tub assembly.

Figure 7-14

R E M O VA L


2. Remove the front panel and lift the topcover (See Front Panel & Top Cover Re-

moval).

3. The switch is located on the upper righthand side of the outer tub assembly, di-rectly behind the right upper front suspen-sion spring (Figure 7-15).

4. Remove the screw and flat washer secur-ing the switch in place.

5. Using a flathead screwdriver, pry theswitch body from the outer tub assembly.

TUB DISPLACEMENT SWITCH

The displacement switch is located on theright hand side of the outer tub assembly, be-low the upper weight. The location of theswitch on the outer tub will activate the switchwhenever the outer tub assembly makes con-tact with the wall of the cabinet. Should con-tact with the cabinet occur before the machinereaches 500 rpm, the machine control is

alerted and will reduce speed to implement aredistribution program.

Outer Tub

Switch

Figure 7-15








1 6 0 0 8 3 7 3 - 0 1 SECTION 8. MOTOR DRIVE SYSTEM 8 - 18 - 18 - 18 - 18 - 1

SECTION 8. MOTOR DRIVE SYSTEMSECTION 8. MOTOR DRIVE SYSTEMSECTION 8. MOTOR DRIVE SYSTEMSECTION 8. MOTOR DRIVE SYSTEMSECTION 8. MOTOR DRIVE SYSTEM

Warning Warning Warning Warning Warning - Always shut off- Always shut off- Always shut off- Always shut off- Always shut offelectr ical power to theelectr ical power to theelectr ical power to theelectr ical power to theelectr ical power to the

unit before beginning anyunit before beginning anyunit before beginning anyunit before beginning anyunit before beginning anyservice procedures.service procedures.service procedures.service procedures.service procedures.

DRIVE BELTDRIVE BELTDRIVE BELTDRIVE BELTDRIVE BELT

The drive belt has six (6) ribs which matewith the face of the motor pulley. The beltencircles the motor pulley and the drivepulley of the spinner.

R E M O VA LR E M O VA LR E M O VA LR E M O VA LR E M O VA L

1. Disconnect power to the unit.Disconnect power to the unit.Disconnect power to the unit.Disconnect power to the unit.Disconnect power to the unit.

2 . Roll the belt off the drive pulley and re-move from the motor pulley.

A D J U S T M E N TA D J U S T M E N TA D J U S T M E N TA D J U S T M E N TA D J U S T M E N T

Check belt tension. If loose, remove the belt,loosen the belt adjustment wheel bolt androtate the wheel one notch in a clockwiserotation. Check belt tension again. The belt

should experience no more than 1" deflectionwhen depressed toward the inside(Figure 8-1).(Figure 8-1).(Figure 8-1).(Figure 8-1).(Figure 8-1).

The motor drive system tear-down procedurecovers all components related to the drivesystem, such as the drive motor, drive belt,motor control, machine control and acceler-ometer switch.

DRIVE MOTORDRIVE MOTORDRIVE MOTORDRIVE MOTORDRIVE MOTOR

The drive motor is hinged into the left bottomarea of the outer tub and secured to the outertub by the bolt on the belt adjustment wheel.A slot in the mounting bracket of the outertub allows the motor to pivot and allowsadjustment of the drive belt tension.



2 . Remove the front panel, rear access paneland the front weight (See Front Panel &(See Front Panel &(See Front Panel &(See Front Panel &(See Front Panel &Rear Access Removal).Rear Access Removal).Rear Access Removal).Rear Access Removal).Rear Access Removal).

3 . From the rear, locate the belt adjustmentwheel and note the adjustment numberaligned with the rib of the outer tub. This

will help later when the belt adjustmentwheel is placed back onto the outer tuband the belt is remounted on the motorand drive pulley. Remove the bolt secur-ing the belt adjustment wheel(Figure 8-2).(Figure 8-2).(Figure 8-2).(Figure 8-2).(Figure 8-2).





1 6 0 0 8 3 7 3 - 0 1 SECTION 8. MOTOR DRIVE SYSYTEM 8 - 28 - 28 - 28 - 28 - 2

4 . Lift the motor slightly to disengage the beltfrom the motor pulley. Place motor on thebase frame.

5 . From the front, remove the wire harnessesfrom the back of the motor.

6 . Grasp the motor and slide it carefully fromthe pivot hang holes in the outer tub.


1 . Reverse the previous procedures to re-mount the motor.

NOTE:NOTE:NOTE:NOTE:NOTE: Prior to hanging the motor, recon-Prior to hanging the motor, recon-Prior to hanging the motor, recon-Prior to hanging the motor, recon-Prior to hanging the motor, recon-nect motor wire harnesses and ground wire.nect motor wire harnesses and ground wire.nect motor wire harnesses and ground wire.nect motor wire harnesses and ground wire.nect motor wire harnesses and ground wire.

2 . Prior to hanging the motor on the outertub, check the positioning of the rubbermotor mounts.

3 . Check belt tension. If loose, loosen the beltadjustment wheel bolt and rotate thewheel one notch in a clockwise rotation.

Check belt tension again. The belt shouldexperience no more than a 1" deflectionwhen depressed to the inside.


MACHINE CONTROLMACHINE CONTROLMACHINE CONTROLMACHINE CONTROLMACHINE CONTROL

The machine control is located in the controlconsole and is secured to the rear cover.



2 . Remove the control console (See Control (See Control (See Control (See Control (See Control Console Removal) .Console Removal) .Console Removal) .Console Removal) .Console Removal) .

3 . Remove the wiring from the machine con-trol, paying close attention to the wire har-ness hookup to the control board.

4. Remove the two 5/16" nuts securing theboard to the rear console panel.

5 . Reverse the previous procedures to re-

mount the board.





1 6 0 0 8 3 7 3 - 0 1 SECTION 8. MOTOR DRIVE SYSTEM 8 - 38 - 38 - 38 - 38 - 3

MOTOR CONTROLMOTOR CONTROLMOTOR CONTROLMOTOR CONTROLMOTOR CONTROL

The motor control is located behind the frontpanel in the lower right hand side of thecabinet . The assembly comprises of thecircuit board, control cover, mounting plate

and motor wire harness.

R E M O VA LR E M O VA LR E M O VA LR E M O VA LR E M O VA L


2 . Remove the front panel ( See Front Panel See Front Panel See Front Panel See Front Panel See Front Panel R e m o v a l R e m o v a l R e m o v a l R e m o v a l R e m o v a l ) .

3 . Remove the shield/cover from the motorcontrol board by depressing the lockingtab found along the lower left side of themotor control base plate.

4. Remove the wire harness leading to thecontrol console (Figure 8-4).(Figure 8-4).(Figure 8-4).(Figure 8-4).(Figure 8-4).

5 . Remove the wire harness from the motor.

6 . Remove two mounting screws in front ofthe motor securing the assembly to thebase. A rear locating tab on the motor

control base engages with a slot in thebase frame.

7 . To replace, reverse the previous steps.





1 6 0 0 8 3 7 3 - 0 1 SECTION 8. MOTOR DRIVE SYSYTEM 8 - 48 - 48 - 48 - 48 - 4




1 6 0 0 8 3 7 3 - 0 1 SECTION 9 . ELECTRICAL SCHEMATICS 9 - 19 - 19 - 19 - 19 - 1

SECTION 9. ELECTRICAL SCHEMATICS & TIMERSECTION 9. ELECTRICAL SCHEMATICS & TIMERSECTION 9. ELECTRICAL SCHEMATICS & TIMERSECTION 9. ELECTRICAL SCHEMATICS & TIMERSECTION 9. ELECTRICAL SCHEMATICS & TIMERI N F O R M AT I O NI N F O R M AT I O NI N F O R M AT I O NI N F O R M AT I O NI N F O R M AT I O N

Prior to Series 17




1 6 0 0 8 3 7 3 - 0 1 SECTION 9. ELECTRICAL SCHEMATICS 9 - 29 - 29 - 29 - 29 - 2

TIMER CHART - Prior to Series 17TIMER CHART - Prior to Series 17TIMER CHART - Prior to Series 17TIMER CHART - Prior to Series 17TIMER CHART - Prior to Series 17





ELECTRICAL SCHEMATIC - Ser ies 17ELECTRICAL SCHEMATIC - Ser ies 17ELECTRICAL SCHEMATIC - Ser ies 17ELECTRICAL SCHEMATIC - Ser ies 17ELECTRICAL SCHEMATIC - Ser ies 17





TIMER CHART - Series 17TIMER CHART - Series 17TIMER CHART - Series 17TIMER CHART - Series 17TIMER CHART - Series 17







TIMER CHART - Series 18TIMER CHART - Series 18TIMER CHART - Series 18TIMER CHART - Series 18TIMER CHART - Series 18





ELECTRICAL SCHEMATIC - Ser ies 19ELECTRICAL SCHEMATIC - Ser ies 19ELECTRICAL SCHEMATIC - Ser ies 19ELECTRICAL SCHEMATIC - Ser ies 19ELECTRICAL SCHEMATIC - Ser ies 19





N O T E SN O T E SN O T E SN O T E SN O T E S:::::



©2000 Maytag Appliances Sales Company16010199 (16008373-03)Revised 7/00

1

INTRODUCTION

Attached is supplement three (16008373-03) for service manual 16008373, whichreplaces supplement two (16008373-02). This Maytag Washer Service Manualsupplement covers Models MAH4000 & MAH5500A . We suggest you file this with your16008373 Manual for reference.

Models covered in this manual supplement:MAH4000 MAH5500A

CONTENTS

SECTION 1. MAH4000/MAH5500A CONTROL FACIA ........................................ 1

SECTION 2. SPECIFICATIONS ............................................................................. 2SECTION 3. BASIC MACHINE OPERATION ........................................................ 3

SECTION 4. WASHER CONTROLS OVERVIEW .................................................. 3

SECTION 5. CYCLE REVIEW ................................................................................ 4

Stain Cycle........................................................................................ 4

Cycle Times ...................................................................................... 6

SECTION 6. GENERAL COMPONENT - EXPLODED VIEW ................................ 7

SECTION 7. ELECTRICAL INFORMATION .......................................................... 8

SECTION 8. WATER CARRYING COMPONENTS ............................................... 9

WATER VALVE .................................................................................. 9

DISPENSER ASSEMBLY................................................................ 9

RECIRCULATION PUMP .................................................................. 10

DETERGENT HOSE .......................................................................... 11

SECTION 9. WIRING INFORMATION .................................................................. 14

For additional information on material covered in this manual, including safety issues,contact:

Maytag Appliances Sales Company240 Edwards Street, S.E.

Cleveland, TN 37311Phone: 423-472-3333






3

SECTION 3. BASIC MACHINE OPERATION

The model MAH4000 and MAH5500A are similar to the MAH3000 washer, with the exceptionbeing the MAH4000 and MAH5500A have a recirculation pump in series between the outertub outlet and the drain pump. When the water pressure switch becomes satisfied (Series 11and later on the MAH4000 and all the MAH5500A), power is then applied to the recirculationpump. The recirculation pump draws water from the bottom of the outer tub and circulates thewater up through the detergent hose, then into the top of the outer tub. By doing this, thewasher is able to provide a more even distribution of detergent throughout the wash load.

The software of the MAH4000 and MAH5500A models is slightly different than the softwareused in the MAH3000 washer. Fabric Selections on the control console were changed fromCotton/Sturdy to Whites, Easy Care/Perm Press to Colors, Delicates remained the same.

Series 10 of the MAH4000 washer allowed the recirculating pump to be directly controlled bythe timer. (Figure 4-1)

SECTION 4. WASHER CONTROLS OVERVIEW

Series 11 & Later

Figure 4-2

Figure 4-1

Series 10(MAH4000 only)

(MAH4000 & MAH5500A)




4

A new Stain Cycle and revised tumble patterns were introduced and will be describedin the following pages.

At series 11 the timer was changed, wire harness revised and the schematic waschanged. The timer cams were changed in the timer, the wire harness changed to pullwires out of the timer connector and the pump is now in series with the pressureswitch, also an extra wire was jumpered across the pressure switch. Now the recircu-lating pump is controlled through the pressure switch (Figure 4-2). This was done to

force the washer to fill with water prior to starting the recirculation pump.

SECTION 5. CYCLE REVIEW

Cycles on the Fabrics switch now list the cycles according to how clothes aresorted. This simiplifies how to select the cycles in doing the wash. A newStain Cycle was added to the Option Switch which adds cycle wash time, vari-ous tumble patterns and an additional rinse with longer tumble times during therinse. (See Figure 5-1)

Figure 5-1




5

Notes:1. The main wash times listed include 2 minutes of bleach fill and tumble time.

2. The total cycle times are approximate and will vary based on water fill times, due totypes of clothing loads and the time for the door lock system to retract at the end of the cycle.

3. The main wash time is affected significantly if the machine control detects an exces-sive amount of suds via a loss of motor torque. The washer will go into a sudsreduction routine, consisting of a series of additional rinse and partial drain cycles toreduce the suds present. (See Troubleshooting & Diagnosis - Clothes Wet at End of Spin )

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Cycle Times:




6

Stain Cycle:General overview of Stain Cycle:1) Tumble in the normal tumble pattern until it has completed filling

plus 3 minutes.2) Tumble for an additional 15 minutes with a 6T/24P tumble pattern.3) Return to selected tumble pattern and proceed with remainder of the

wash time preselected.4) Bleach fill and first rinse fill temperature will be the same as the wash fill

temperature.5) Rinse times (including fills) are now 5-1/2 minutes, 4 minutes, 4

minutes and 4-1/2 minutes.6) The fourth rinse is forced, which would be warm if warm rinse selected.

(Colors will not default to cold on the 4th rinse.)

The following is an example of a Stain Cycle:

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Suds detection during stain cycle:1. Torque baseline is set during the first 3 minutes of Wash cycle after the washer is

filled.2. Suds detection is frozen during 15 minutes of the 6/24 tumble action during Wash/

Fill cycle.3. Suds detection begins when cycle resumes the initial selected tumble pattern .




7

SECTION 6. GENERAL COMPONENT - EXPLODED VIEWComponent Identification & Location:




8

SECTION 7. ELECTRICAL INFORMATION

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6. Carefully lift the valve with the inlet

hoses attached and direct the inlethoses through the openings in thevalve mounting bracket.

7. The hoses can be crimped or thewater shut off at the faucets. Place atowel below the valve and remove theinlet hoses from the water valve.

8. To reinstall, reverse the aforemen-tioned procedure.

DISPENSER ASSEMBLY

The wax motor and linkage system de-signed for proper dispersing of the waterinto the bleach and fabric softener dis-pensing cups has been eliminated. Thenew system uses a 4 coil water valve withdesignated inlet hoses leading to each

dispensing cup. The 4 coil water valveoperates like a 2 coil water valve. Thetwo water valve coils are individuallydedicated to dispensing water throughthe bleach and fabric softener dispensingcups. When either of these valves isopen, part of the flow will be routedthrough the dispenser cup. A portion of the flow will still be routed through thedetergent wash area.

SECTION 8. WATER CARRYING COMPONENTS

Warning - Always shut offelectrical power to the unitbefore beginning any ser-vice repair procedures.

WATER VALVE

The water valve is accessible from the front of the machine. The flow rate of thedispenser 3 gpm.

Removal

1. Discontinue power and water to themachine.

2. Remove the front panel and lift the topcover.

3. Remove the wire harness connectionsto the water valve solenoids.

4. Loosen and remove the hose clampson the inlet hoses leading away fromthe water valve.

5. Locate and loosen the valve mountingscrew by turning the screw at leastthree full turns.

NOTE: The mounting screw serves as a locating pin to hold the valve in position on the mounting bracket. By

partially removing the screw, thewater valve can now be slid to the

left and removed from the bracket (Figure 8-1).

Figure 8-1




10

As a result of this revision, a new dis-

penser bottom, water valve and hoseswere introduced. (See Figure 8-2)

OPERATION:When Bleach or Fabric Softener is re-quired to dispense, the dedicated sole-noid on the water valve is activated thesame as the previously used wax motor.Water is directed to dedicated spouts onthe dispenser bottom. (See Figure 8-3)

Inside the dispenser bottom, water isdirected into the designated channelsleading to the siphon cup assembly.

RECIRCULATION PUMP

The Recirculation Pump is accessible from the front or the rear of the machine.The pump is connected in series with theouter tub pump hose and the drain hose.

(See Figure 8-4)

1. Disconnect power and water to themachine.

2. Remove the front panel.

3. Lay a towel under the tub to pumphose and loosen the clamp on thepump connection to the hose.

4. Loosen the clamp on the detergenthose connected to the side of therecirculation pump.

5. Lift the recirculation pump at an angle

to disengage the locating tab of themounting bracket from the baseframe.(See Figure 8-5)

Figure 8-4

Figure 8-2

DISPENSERFLUME

DISPENSERBOTTOM

FABRICSOFTENER

INLET HOSE

DETERGENTWASH INLET

HOSE

BLEACHINLET HOSE

Figure 8-3

DISPENSERBOTTOM

(TOP VIEW)

FABRICSOFTENER

BLEACH

NOZZLE WASREMOVED




11

Figure 8-5

Figure 8-6

6. To remove the pump from the mount-ing bracket, pull down on the mount-ing tabs and slide the pump off themounting bracket. (See Figure 8-6)

DETERGENT HOSE

The detergent hose leads from the recir-culation pump up the rear of the washercabinet and leads to the top of the outertub assembly. The hose provides a path

for the water to recirculate from the lowerpart of the outer tub assembly to theenter on top of the outer tub assembly.

Note: Small indicator marks are painted on the hose to locate and properly posi-tion the metal mounting clips onto the

hose.

Removal

1. Disconnect power and water to thewasher.

2. Remove the detergent hose from therecirculation pump.

NOTE: Indicator mark on hose for reinstallation.

Figure 8-7

INDICATORMARK

DETERGENT HOSE

RECIRCULATION PUMP




12

3. Locate the rear mounting clip on thedetergent hose in the access panelopening and slide the clip off thecabinet flange. (See Figure 8-8)

Note: When reinstalling clip tocabinet ensure the clip is approxi-

mately 1 inch up from the insidecorner of the access opening to

prevent kinking of the hose.

4. Follow the detergent hose vertically upto the air dome hose mounting bracket.The detergent hose is tucked behindthe air dome hose. (See Figure 8-9)

Figure 8-8

Figure 8-9

Figure 8-10

Figure 8-11

5. The detergent hose then goes verti-cally to the upper right rear flange of the cabinet and is retained by twometal clips. Indicators are on the hoseshowing the proper positioning of theclips on the hose.

NOTE: The upper left clip should be positioned directly above the top air dome hose retainer.(See Figure 8-11 & 8-12)

6. The detergent hose turns 90 degreestoward the front of the washer andpasses through the saddle horn on thetop of the outer tub. Unsnap the hose

from the saddle horn.(See Figure 8-12)




13

Figure 8-12

7. The saddle horn is secured to the topof the outer tub with a screw.

NOTE: The upper wire harness for the unbalance circuit is snapped intothe saddle horn with the detergent

hose.

8. Loosen the clamp on the detergenthose on the outer tub and remove thehose.

9. To reinstall, reverse the removal stepstaking note of the indicators on thehose in reference to the mountingclips, making sure the hose does notkink above the recirculation pump.




14

SECTION 9. WIRING INFORMATIONPlease refer to the technical schematic packed in the control console in the washer forup to date wiring information for the product your are servicing. The schematics on the

following pages are only a general reference at the time this manual was printed.




15

SERIES 10 - SCHEMATIC (MAH4000 only)




16

SERIES 11 (MAH4000 and MAH5500)




17

SERIES 10 - TIMER CHART (MAH4000)




18

SERIES 11 - TIMER CHART (MAH4000 & MAH5500A)


http://slidepdf.com/reader/full/maytag-neptune-manule-service 106/157©2001 Maytag Appliances Sales Company

16010486(16008373-05)

16008373-05

Attached is Supplement five for service manual 16008373 .

This Maytag Washer Service Manual supplement covers Models MAH5500B and

MAH7500 . The following information is supplemental to the information found in thebasic manual part number 16008373 . Please refer to this manual for detailed serviceinformation.

We suggest you file this with your 16008373 Manual for reference.

MAYTAGNew Century

Neptune WasherService Manual

Supplement


http://slidepdf.com/reader/full/maytag-neptune-manule-service 107/157©2001 Maytag Appliances Sales Company16010486 (16008373-05)Revised 02/01 iii

INTRODUCTION

Attached is supplement five (16008373-05) for service manual 16008373, which inaddition to supplement three (16008373-03). This Maytag Washer Service Manualsupplement covers Models MAH5500B & MAH7500A . We suggest you file this withyour 16008373 Manual for reference.

Models covered in this manual supplement:MAH5500B MAH7500A

CONTENTS

SECTION 1. GENERAL INFORMATION ............................................................... 1-1

SECTION 2. WASHER CONTROLS OVERVIEW.................................................. 2-1

SECTION 3. DIAGNOSTIC/HELP CODE TABELS ............................................... 3-1

SECTION 4. ELECTRICAL COMPONENTS & TESTING ...................................... 4-1

SECTION 5. TEARDOWN & WIRING INFORMATION ......................................... 5-1

For additional information on material covered in this manual, including safety issues,contact:

Maytag Appliances Sales Company240 Edwards Street, S.E.

Cleveland, TN 37311Phone: 423-472-3333


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1-216010486 (16008373-05)Revised 02/01 Section 1. General Information

BASIC MACHINE OPERATION

Models MAH5500B and MAH7500 are similar to the MAH4000 washer, with the exceptionbeing they do not have recirculation of the wash water. A special sump cap is placed directlyabove the sump area which catches the detergent and allows for a better mixing of thedetergent and the wash water. The door lock mechanism was updated from a wax motorsystem to a solenoid, resulting in faster locking and unlocking of the door. The water level

pressure switch was relocated from the console to the top of the pump, thus eliminating theairdome hose. The motor drive system was changed to a sensorless system, thus eliminatingthe tach sensor in the motor in the harness leading to the motor control board. Heater withthermistor was added to the sump area of the tub to heat the wash water on the MAH7500Amodel.

General Flow Of A Complete Wash CycleThere are several user selections which modify the main wash. Fabric selection impacts tumblepattern. Wash/rinse temperature selection determines water fill temperature. Soil level andquick wash selections determine wash time. The Stain cycle and Presoak options add addi-tional time with a special tumble pattern to the main wash. The stain cycle option also adds

rinse time to non-heavy cycles and some warmer rinses. The Quick cycle reduces wash timeand only has two rinses. For this cycle, less detergent should be used.

1) The wash cycle is selected and started by user by pressing Start/Pause button

2) The door lock mechanism is verified by locking it and unlocking it. The door is left unlocked.

3) The drain pump will turn on (energized) for a short period of time.

4) The water fill will begin after a delay from the time the pump is turned off. The temperatureof the water entering the tub depends on the user selections.

5) After 30 seconds the door will be locked and the machine will tumble at the Handwash washtumble pattern (less aggressive) until the machine is at wash level. The exception would beif the Cotton/Sturdy is selected or Quick cycle and the washer would have a 7/3 tumblepattern. Note: No permanent locking, tumbling, or spinning shall be done for 30 secondsafter any cycle is started or re-started. Filling and draining will be allowed in this initialperiod. Once filled, the tumble pattern and the total wash time depends on the user selec-tions. A Wash Tumble Flush occurs shortly after the water reaches the wash fill level. AWash Tumble Flush will have special tumbling speed to ensure the proper mixing of thedetergent.

7) Shortly before the end of the wash cycle bleach will be dispensed.

8) The washer will then drain and spin.

9) The washer will fill tumble, drain, and spin repeatedly to rinse the clothes. The number ofrinses and spin speeds will be dependent on user selections. Toward the end of the washand rinse spin, the cold water valve will be turned on for 6 seconds. During the final rinse themachine will perform a tumble flush to clean the machine.

10) A final drain and high speed spin will be performed to extract the water from the clothes.




CYCLE SEQUENCES

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Basic Tumble Patterns:

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Rinse Tumble Times:

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Note: The final rinse time does not include theTumble Flush time. Tumble Flush time will add aminimum of 30 seconds to a maximum of 60additional seconds to the final rinse time. (Seedefinition of Tumble Flush)

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ON/OFF SEQUENCE OF PUMP DURING SPIN CYCLE

The water temperature entering the washer during rinse is tempered. The followingtable shows the temperature based on the user selections.

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2-116010486 (16008373-05)Revised 02/01 Section 2. Washer Controls Overview

SECTION 2. WASHER CONTROLS OVERVIEW

The software for the MAH5500B and the MAH7500 is different than the MAH4000washer. The new controls operate via a membrane pad on the MAH5500 and a touchscreen/membrane pad on the MAH7500 washer.

Features of MAH7500 (LCD Washer):A membrane switch (keyboard) with aLCD display and touch screen.The user can select a delay start.The wash/rinse temperatures and washcycles are remembered and based onthe previous fabrics type selected.The control panel drives a heater locatedin the sump.The control displays the estimated time

remaining in the cycle.The control panel detects hose reversaland changes the fills as necessary.The control panel stores codes to aid theservice person in diagnostics.

Figure 1

Features of MAH5500B (LED Washer):A membrane switch (keyboard) with anembedded LED display.The user can select a delay start.The wash/rinse temperatures and washcycles are remembered and based onthe previous fabric type selected.The user can select another wash cycleduring the operation and the control willdetermine the completion of the cycle.

The control panel displays the estimatedtime remaining in the cycleThe control panel stores codes to aid theservice person in diagnostics.The control panel detects hose reversaland changes the fills as necessary.

BASIC CONTROL BOARD PHILOSOPHY FOR BOTH WASHERS:




USER INTERFACESELECTIONS: (LED Washer)

The user can select the setting of several features while in the User Interface ActiveMode or the Main Wash Cycle. The user

sets the features by pressing a key on thekeypad and the machine goes into the setmode. If the machine is in the main washcycle, additional criteria may be appliedprior to changing the feature. The modesto set a feature are:

Fabric ModeTemperature ModeCycles ModeDelay ModeSignal ModeOptions Mode

FABRIC MODEWhen a Fabrics key is pressed, the lastcycle that was not a Quick, Rinse, or Spincycle, will be recalled. Each Fabrics key(Cotton/Sturdy, Wrinkle Free, Delicates,Handwash, ) remembers the wash/rinsetemperature settings, max extract option,extra rinse option, and wash settings.

TEMPERATURE MODEFour discrete wash/rinse temperatureselections are provided, each with anassociated LED. Up and down arrow keysare used to make the wash/rinseselection. Holding down one of thesekeys will advance at a rate of one level perhalf second. Wash/rinse selection will notwrap around.

CYCLES MODE

When a wash key is selected (heavy,normal, light, quick, rinse, or spin), theLED shall be lit and remain lit until anotherwash cycle is selected. The wash LEDsdo not change during the wash cycle.

DELAY MODEThe delay start option is primarily usedwhen a person wants to run the washing

machine at night or some other time tobetter suit the needs of the household.

The consumer can select the time delay from 1 hour to 9 hours in increments of 1hour. The user shall press the delay button

for each 1 hour increment. Holding downthe delay wash key will advance throughthe one hour increments to off and startover again.

The delay time (in hours) shall be shownin left digit and an H (for hours) shall beshown in the right digit of the display.

If delay wash has been selected, but Start/Pause has not been pressed to initiate it,

then the Start/Pause LED will flash off andon to indicate that it must be pressed.The Start/Pause key must be pressed toinitiate a delay wash cycle. Once it hasbeen pressed, the Start/Pause LED willstay on constant and the time will begin tocount down and the display will indicatehours of delay remaining. When one hourof the delay is reached, the time will beshown in minutes in the two digits of thedisplay.

Note: If a regular cycle has been running for more than five seconds, thedelay wash key will be locked out.

SIGNAL MODEThe volume level of the end of cyclesignal is adjustable. The sound ranges

from off to 3 in increments of 1. Theuser will be able to select the plus (+) toincrease the volume level. The user willbe able to select the minus (-) to decreasethe volume level. When the user firstpresses either of these keys, the currentend of cycle signal will be demonstrated.

Subsequent presses of either the plus orminus button within 5 seconds of theprevious key press will increase ordecrease one level. The new end of cycleshall sound.




OPTIONS MODEWhen the extra rinse key is selected, anextra rinse is added for the wash cycles.(Page 1-3 Extra Rinse Table)

When max extract speed key is selected,the max extract profile will be used for

spin cycle based on the fabric selection.When the stain cycle key is selected, thewater input temperature, the wash time,the tumbling pattern, speed, and amountof rinses may be modified.

When the presoak key is selected, apresoak is added before the main washcycle.

DISPLAY CHARACTERISTICS

Door Locked LED:

When the door is finally locked, the doorlocked LED is lit. When the door is finallyunlocked, the door locked LED is not lit.

Two Digit Display:

The display shows the estimated timeremaining in the total cycle in minutes.

This time will count down during the totaltime cycle.

If the selected Wash cycle button ispushed, the estimated time remaining inthat wash cycle shall be displayed for 5seconds and the associated Wash levelLED will flash. After 5 seconds, theestimated time remaining for the totalcycle will be displayed and the wash levelLED will return to being on constant.

Changing Selections:

Fabric, temperature, and optionsselections may be changed at any time.The current cycle step will be suspendedand the appropriate cycle step will berestarted with the new selections. The

machine will not stop, but rather thechanges will be dynamic.

The main Wash Keys may be changed atany time. The cycle time remaining isrecalculated and displayed. Theremaining time is calculated by applyingthe actual time in the new cycle. If theuser had originally selected Heavy washand 3 minutes has elapsed and the userthen selects Normal wash, the timeremaining will be 12 minutes. (e.g. 15minutes Normal wash minus 3 actualminutes = 12 minutes). If the user hadoriginally selected Quick wash, 1 minutehad elapsed, and then the user selectsHeavy wash, the new remaining time willbe 19 minutes (20 minutes heavy washminus 1 minute actual time).

The main Wash key may not be changed if there is less than 2 minutes time

remaining in the wash cycle (Bleach Fill).Although the button can be depressed,the LED status will change but the timeremaining or wash cycle will not change.

USER INTERFACE SELECTIONS:

(LCD Washer)

All selections described under the LEDwasher section are familiar except in the

Delay mode. In this mode, time isincreased in 15 minute increments up to12 hours.




INPUT MODIFICATIONS DEFINED

PRESSURE SWITCH INPUTThe pressure switch is a two level pressure switch. (Figure 4-2) The low level contactsprovide a path for a 24 VDC sensing circuit, the high level contacts provide an electricalpath for 110 VAC to the water valve relays on the board. Another sensor on the boardmonitors the high level circuit to determine when the high level is reached and the

circuit is opened. Thus, shutting off the water valve relays.

During wash fill, the low level of the pressure switch is sensed with 24 VDC and providesan indication to the control board the water level has satisfied the low level. Oncesatisfied, the 24 VDC circuit is opened. The board then opens the water valve relays andshuts off the water valves.

During rinse fill, the high level provides an indication to the machine control as towhether the high water level has been reached. When the water level switch is satisfied,the pressure switch circuit is opened and power for the water valves is no longer passedthrough the machine control.

Figure 2

TEMPERATURE SENSOR INPUTA thermistor is located in the water valveto monitor the blended incoming watertemperature. The machine control usesthis input signal to regulate the watertemperature with the warm or cold washand warm rinse temperature selections(See Water Valve Outputs).

On the MAH7500 model, anotherthermistor is located on the heaterassembly. The machine control boarduses this input signal to maintain thewater temperature in the sump area of the outer tub, by cycling the heater on/off.

DOOR LOCK SWITCH INPUTWhen input is present, this is indicationthe washer door is locked. The machinecontroller will not command the spinnerto tumble or spin when the door lockinput is not present.

If the door is opened during a cycle,the control will pause the cycle on theMAH5500B.




START/PAUSE INPUTThe start/pause input is selected on themembrane switch for both washers. If this input is initially selected the machinecontrol will begin the wash cyclesequence as defined by the user inputselections. If this input is selected when acycle is in progress, the machine controlwill pause the cycle and unlock the doorwhen it is safe to do so.

(Note: Machine control board is powered up all the time. There no longer is a line relay used, as opposed tothe MAH3000, 4000 and 5500A models.)

TACH INPUTThe tach input is a feedback signal fromthe motor control. It provides eightpulses per revolution of the switchedreluctance motor. The motor runs at 14times the speed of the spinner (14:1 beltratio). The tach input is used formonitoring speed and out-of-balancedetection (See Tachometer Circuit

Diagnostics).

If the machine control commands a motorspeed and direction but does not sense atach input signal within 2 or 3 seconds, itwill assign a HELP code number andperform 10 retries. If unsuccessful, thisgenerally indicates a locked rotor or amalfunction in the motor control.

If the machine control commands a coastdown from final spin speed but is stillreceiving a tach input signal after twominutes, it will log appropriate service

codes.

OUTPUT MODIFICATIONSDEFINED

DOOR LOCK/UNLOCKSOLENOID OUTPUTThe Door Lock/Unlock Solenoid Output

signal is a 60 millisecond pulse sent to asolenoid in the door lock assembly. Thesolenoid is attached to a lever whichmoves a slider in the mechanism to lockthe door after it has been closed and thecycle started. The solenoid has two coils,one for locking and one for unlockingwhen a pulse is directed to specificterminals on the solenoid. Power is notcontinuously applied to the solenoid,because this would damage the solenoid.

END-OF-CYCLE SIGNAL OUTPUTThe End-Of-Cycle Signal Output is aninternal signal on the machine controlbetween the microprocessor andannunciator. The end-of-cycle signalsounds when a wash cycle is finished.The end-of-cycle signal sounds as fourpulses on the MAH5500B and 3 pulses onthe MAH7500 in a 0.5 second intervals. If the door is opened right at the end of the

cycle or during the end of cycle beeps,then the signal will stop on the MAH5500Bonly. If the start/pause key is pressednear the end of the cycle, the end of cyclesignal will not occur unless the cycle isrestarted and allowed to finish. If the Off key is pressed, the end of cycle signal willnot occur. The end of cycle signal willoccur when the door is unlocked andready to open on the MAH5500B. On theMAH7500, the signal sounds then the

door is unlocked.

HEATER OUTPUT (LCD Washer only)The machine control board turns theheater on to heat the wash water duringthe main wash until the temperaturereaches the targeted main washtemperature. The heater is turned backon at any point the temperature falls 5º F




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below the main wash target temperature.The heater monitors the watertemperature through the thermistor in theheater assembly. Selecting the energysaver, will turn off the heater and will notaffect tumble patterns.

Main Wash Target Temperatures

The heater will not be turned on if the following conditions exist:1. Low level of the water pressure switch

is not satisfied.2. The door is open.3. During the Bleach fill.4. Energy Saver on.

DOOR LOCKED LIGHT OUTPUTThe Door Locked Light Output signalpowers a LED on the membrane padswitch of the LED washer. This output isenergized when the washer door islocked.

VDC REFERENCE VOLTAGE OUTPUTThe VDC Outputs are a reference voltage

for many of the signal outputs. On themachine control, the VDC outputs are 24VDC referenced from P2(3) to theindividual outputs.

WATER VALVE OUTPUTSThe machine control determines whetherthe hot or cold Water Valve Outputsshould be energized during the washcycle based upon the user selections.When water fill is required, the machinecontrol board will activate relays on theboard, supplying power to the watervalves.

The machine control gates the power tothe hot and cold Water Valve Outputs.When the pressure switch senses that the

full level is reached, the circuit opens andthe machine control de-energizes theWater Valve Outputs.

The machine control will monitor thethermistor resistance and fill time toachieve proper wash temperatures.

During a warm wash the cold may becycled off periodically to achieve thedesired water temperature.

On a cold wash the hot valve may becycled on and off.

CYCLE SEQUENCE DEFINITIONS

IDLE/PAUSE MODE (LED Model)

After pressing the Off key, the entirewashing machine will shut down afterunlocking the door and will be in the IdleMode. In the idle mode all the outputs arede-energized, all the LEDs and display areoff.




If the Start/Pause key is pressed duringthe wash cycle the washer shall stop allthe functions of the washer, placing thewasher in the Idle Mode. The Start/PauseLED will flash indicating the pause mode.The current place in the cycle will besaved.

If the Start/Pause key is pressed the doorwill not be unlocked until the spin speedis 0 rpm.

If the Start/Pause key is pressed while flashing (in pause mode), the machineshall return to the start of the cycle stepwhen paused and the time displayed berecalculated to the start of the cycle step.The Start/Pause LED will stay on

whenever the machine is running in acycle. Note: The door must be closedprior to resuming the cycle.

BLEACH DISPENSEThe Bleach Fill occurs 2 minutes prior tothe end of the wash portion of the cycle. Ableach fill consists of turning the bleachwater valve and the appropriate fill watervalve(s) on until the water reaches highwater level or for 24 seconds, whichever

comes first. This is to ensure the bleach isused completely during this wash. The

fill temperature during the Bleach fill shallbe based on the user selections. If staincycle is selected then bleach fill and finalrinse are based on user selections. If staincycle is not used, then only the final rinseis affected.

REDISTRIBUTIONAs the machine is accelerating into spin, if

it detects that the clothes load isunbalanced and would cause excessivevibration, it will decelerate and tumble theclothes in an attempt to redistribute themin a more uniform manner so thatvibration is reduced.

The machine control commands adistribution profile speed ramp from 0rpm to 85 rpm at the beginning of each

high speed (above 100 rpm) spin. Whenthe washer reaches 85 rpm, the machinecontrol monitors the Tach Input todetermine if the speed varies through onerevolution of the spinner basket. If itsenses a high enough variation in speed(suggesting an out-of-balance condition inthe clothing load), it will drop the spinnerspeed to 0 rpm and force a short reversetumble to redistribute the clothing loadbefore resuming the spin. If any of theout-of-balance switches trip and open theout-of-balance input circuit at a speedbelow 500 rpm, the machine control willalso drop the speed to 0 rpm and forcethe reverse tumble to redistribute theclothing load before resuming the spin.

SUDS DETECTIONThe suds detection feature tries toeliminate excessive suds during the mainwash or rinse cycles. Suds detection isdisabled during a stain cycle tumblepattern.

If suds are detected, the estimated timeleft on the wash cycle will be modified toaccount for 4 additional rinses.

The washer will try twice in early spinsand 21 times when in the final spin.

LCD Washer: If four out of seven cycleshave suds detected, Too many Sudsdetected should be displayed on thescreen.

LED Washer: If suds are still detected, therinse LED shall blink, 3 seconds on, 3 sec-

onds off and "sd" will be displayed.TUMBLE FLUSH (Two types of flush)Wash tumble is a higher tumble speedthan normal while the machine is filledwith water. The purpose of this function isto clean the machine. Rinse tumble flushis performed during the final rinse toreduce the chance of suds creation.




DOOR LOCK PHILOSOPHY

The door lock mechanism is checkedby the machine control board forproper operation. This is done in the

following manner.

1. The door will be locked. If the doordoes not lock on the first try, a helpcode 47 is logged into the controlmemory. The display will show thedoor has not locked.

2. If the door lock switch check showsthat the door is locked, then the doorwill be unlocked and the cycle will

continue unless the door fails tounlock. If the door fails to unlock, thecycle will be paused until the door isable to unlock for 30 seconds and lockagain.

DOOR LOCK OPERATION1. By closing the door, the door lock

hoop rotates the catch cam and thedoor actuator is depressed actuatingthe door open/closed microswitch.

MISCELLANEOUS 2. A 60 milliseconcd 120 VAC impulse from the machine control board to thelock solenoid extends the push rod of the solenoid and moves the lock leverto the right only to lock the door. Thelock lever in turn is engaged with theslider and slides the slider toward thedoor lock mechanism and inhibits thedoor lock mechanism from releasingthe door lock hoop of the door.

5. The slider will actuate the door lock/unlock microswitch in the lockedposition and the washer will begin thewash cycle.

6. When the wash cycle is finished animpulse from the machine controlboard to the unlocking solenoidunlocks the door by pulling the slideraway from the door latchingmechanism and the lock/unlockmicroswitch.

7. The consumer can now open the door.

8. By opening the door, the open/closedmicroswitch is open.

DoorLock/UnlockSolenoid

EmergencyCord

MechanicalOpener

CamSupport

Door Open/ClosedSwitch

Door LockSpringRotating

Cam

Lamp Socket& LampDoor Actuator

Door Lock/UnlockSwitch

LockingLever

SolenoidPush-Rod




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POWER LOSS/FAILUREPower-up after a power-loss during a mainwash cycle. The machine cycle will re-sume at the appropriate cycle step afterthe Start/Pause key has been pressed. Thecontrol recovers the saved information onpower-up after a power loss. The recov-ery will be to the appropriate step in thecycle and within 3 minutes of the cyclestep where the power loss occurred. TheLCD display will be reset to the appropri-ate time left after the Start/Pause key hasbeen pressed and not indicate a power

failure at that point. The main wash cyclewill resume immediately after the Start/Pause key has been pressed.

When a power loss occurs during the finalspin of a main wash cycle, the cycle willend, on the MAH5500B. The MAH7500Awill finish the spin cycle.

Power-up after a power-loss during servicemode, continuous mode, or advertisingmode will cancel these modes.

These modes will not resume after thepower-up until the user selections arepressed again.

If a power outage occurs during a cycle thewasher will come back up in the pausedstate. When paused (either by a poweroutage or by the user), the washer willremember where it was. The machine willnot automatically time-out and cancel acycle while paused. The display will re-main on for 10 minutes after it is pausedwith no activity. After 10 minutes of noactivity, the display will turn off, but the

machine will remember where it was andthe display will be turned back on with anyuser activity.

SPECIAL FEATURES

The LCD and LED washers come withseveral new features not available with theearlier versions of the Neptune washers.By pressing a combination of keys, thewasher can be placed into an AdvertisingMode or into a Service Mode for theservice technician.

ADVERTISING MODEThis mode will continuously display theLEDs on the keyboard or illuminate theLCD touch screen.

MAH7500A:Continuously monitors and saves infor-mation to memory every minute or ascycle selection change.




LED Washer

Pressing the heavy soil and cotton/ sturdy keys for 3 seconds shall start thewasher in the Advertising mode. No

functions will be run except illuminatingthe LEDs.

The Advertising mode lights the LEDs in arow and proceed in row order. The seg-ments on the display are turned on inunison.

LCD WasherThis mode will continuously display thetouch screen on the keyboard.

Pressing the favorites and back keys for 3seconds shall start the washer in theAdvertising mode.

While in advertising mode, the display willcycle through several screens. If thetouch screen or any key (except off) ispressed, the advertising sequence will betemporarily interrupted and the controlwill go to the Interactive State.

When this occurs, the user is able tonavigate through the control as normal(including setting favorites, setting prefer-ences, etc.), but the machine will not beallowed to run a cycle. The only methodsof exiting the advertising mode are toremove power from the machine or to

press and hold both the back key and the favorites key for 3 seconds.

After 5 minutes of inactivity in the interac-tive mode, the control will time out andreturn to Advertising Mode and the adver-tising sequence will begin again. Anysettings or changes that the user hasmade while in the interactive mode willnot be remembered.

SERVICE MODE

The service mode provides service person-nel the ability to verify the operation of thewashing machine.

The service mode can be entered at anytime. While in the service mode, theservicer can start special service tests suchas a service cycle, user interface check,quick spin, and control system diagnosemode or advance the washer to the nextstep in the wash cycle. (See Service ModeTable) The information will be displayedand a variety of other information about themachine can be accessed via the Help andDiagnostic codes.

To aid the service technician, specialsoftware was incorporated into the con-trol boards of the MAH5500B & MAH7500washers. The software is used to monitorseveral functions of the washer duringoperation and identify any abnormalitiesas they arise. These abnormalities can bemonitored in the Service Mode and theboard will list previously identified fail-ures as either a Help or a Diagnostic code.

The Help codes are generally loggedwhen the severity level of the abnormalityis not sufficient enough to shut down thewasher or require service.

The Diagnostic codes are generallylogged dentified when the severity levelof the abnormality detected is higher andservice may be required.




NOTE: Due to the various differences in the two washer control systems, the following pages will focus first on the LED washer then the LCD washer.

The Help and Diagnostic code lists arestored in separate permanent memorieswith a maximum of nine codes per list.

LED WASHER:

Accessing Service Mode:

Pressing down the delicates and heavy soil keys for 3 seconds places the machine inthe service mode.

SPECIAL TESTSThe following table lists the various testsavailable while in the Service Mode, whichcan be accessed by pressing the followingkeys:

SERVICE MODE TABLELED Washer:

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Membrane Pad CheckWhile in service mode, pressing thewrinkle free key will start a membranepad switch check.

The membrane check involves turning allthe embedded LED on the membranepad off except for the wrinkle free key. Allthe LED s can be toggled by pressing thekey associated with the LED.

At any point, if there are 5 seconds of inactivity, then this test will exit withoutany display.

The off key must be pressed twice within30 seconds in order to cancel this test.

FAST TIME DOWN TESTWhile in service mode, the pressing of quick key will advance the program tothe next portion of the wash cycle. (Referto page 1-2)

QUICK SPIN TESTWhile in service mode, the pressing of

spin key shall start the washer in thequick spin mode.




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The following Quick Spin test steps are as follows:

1) Lock the door.2) Spin to 350 rpm and hold for 6 seconds.3) Spin to 550 rpm and hold for 6 seconds.4) Spin to 600 rpm and hold for 6 seconds.

5) Spin to 650 rpm and hold for 6 seconds.6 Spin to 800 rpm and hold for 6 seconds.7) Spin to 1000 rpm and hold for 6

seconds.

If the Spin key is pressed again during theQuick Spin test, the current speed will beheld indefinitely. Pressing the Spin key againwill allow the quick test to proceed as listedabove.

When the washer is in the spin cycleduring the Service Mode, the speed willbe displayed as follows.

QUICK SERVICE CYCLEPressing the delicates key will start aquick service cycle . This will be a quickcheck of all systems.

The following steps will be followed.

1. Energize the cold and bleach. Fill toLow level, then turn bleach and coldoff.

2. Energize the hot and fabric softener.Fill to high level, then turn all valves off.

3. Tumble using 7/3 tumble pattern for 12sec.

4. Lock the door.

5. Turn the drain on.

6. Spin to 800 RPM using default rates.

7. End spin and Coast down.

8. Unlock the door when the RPM is zero.

9. Display a PA on continuously for 10seconds if no diagnostic codes werelogged during this test.

The up arrow if pressed will advance tothe next step. The right most dot shouldbe turned on as an indication of failure andstay on until quick service cycle test hasreached the end. Any diagnostic codelogged during this test should result in

failure of the test, but should not necessar-ily stop the test.

If any steps in the quick service cycle fail,then a service mode is entered, and the

first diagnostic code that was loggedwould be displayed.

While in quick service cycle, the pressingof the hand wash will suspend the ma-chine at this step until the Hand Wash keyis pressed again up to 30 minutes. All




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LED s will flash on and off while the cycleis paused.

BOARD INPUT TESTWhile in service mode press the handwash key places the washer into theBoard Input Test.

BOARD OUTPUT TESTWhile in service mode, pressing the rinsekey places the washer into the BoardOutput test. This test will turn on a speci-

fied output after a key press. All outputwill be turned off after 10 minutes. or if another output is selected.

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HELP CODESWhen the washer performs differently

from design, a Help code is identified andassigned. The severity level is generallyless than that of a diagnostic code.

Accessing The Help Codes

Place the washer into the service mode,then press the stain cycle key. A h willdisplay and turn the LED on above theStain Cycle key.

The Help codes can be reviewed by usingthe arrow keys. The up/down arrow willgo track up/down the list one code at atime. The first code to display will be thelatest code generated. The oldest codewill be on the bottom of the list. If thereare no help codes available, - - will bedisplayed. If the code happened on theprevious cycle, then the rightmost dot willbe turned on.




Number of Cycles Since Code Assigned

While this help code is displayed, if theextra rinse key is pressed and held, themachine shall display the number of cycles ago the Help code occurred whilethe key is held. Also, while this key is

being held, the LED will be turned on bythe key. When this key is let up, then thehelp code is again displayed. If there areno help codes available, - - will bedisplayed while this key is pressed. If thecode is over 99 cycles ago, then - - willbe displayed.

Clearing the Help Codes

The list of Help Codes can be cleared fromthe memory of the board, by pressing

heavy soil and stain keys for 3 secondswhile viewing the list.

For a listing of available Help codes, seeSection 5: DIAGNOSTIC/HELP CODE TABLES .

DIAGNOSTIC CODES:

When a problem with the wash system is

detected a diagnostic code is assignedand logged into the control boardmemory with the last cycle count at whichit occurred. Diagnostic codes aregenerally more severe than a Help code.

In some cases, when the washer shutsdown, something shall be displayed onthe display until the consumer presses akey or opens the door. See the table forspecific actions or references to wherethe proper action is defined.

Accessing Diagnostic Codes

After the machine is in the service mode,pressing presoak key will display a dand turn the LED on above the presoakkey. The diagnostic codes can be viewedby using the arrow keys. The down arrow

will go down the list.

The first time the down arrow key ispushed, the newest code is displayed

The up arrow will go up the list one codeeach time it is pushed with no wrap. Thetopmost will be a d . The bottommostwill be the oldest code. If there is nodiagnostic codes available, - - will bedisplayed for the diagnostic code. If thecode happened on the previous cycle,then the rightmost dot should be turnedon.

Number of Cycles Since Code Assigned

While this diagnostic code is displayed, if the cotton/sturdy key is pressed andheld, the machine shall display thenumber of cycles ago the diagnostic codeoccurred while the key is held. Also,while this key is being held, the LEDshould be turned on by the key. Whenthis key is let up, then the diagnostic codeis again displayed. If there is nodiagnostic codes available, - - will bedisplayed while this key is pressed. If thecode is over 99 cycles ago, then - - willbe displayed.

Clearing Diagnostic Code ListThe diagnostic code list can be cleared

from memory, by pressing heavy soil and presoak keys for 3 seconds while viewingthe list.




ACCESSING SERVICE MODE

LCD WASHER:Press and hold the back and help keys for5 seconds to enter the Service Mode.

Pressing the Service Mode keys again,will take the machine out of the ServiceMode.

The following screen will appear on thetouch screen.

The Service Mode screen lists fourdifferent touch panels; service tests, RPM/torque, unbalance diagnostic codes andexit service mode. Pressing any of thetouch screens will activate a different

screen dedicated to that function, exceptRPM/torque.

If the washer is in operation when theservice mode is activated, the currentspinner RPM, torque and unbalance willbe listed.

The diagnostic codes listed are the last four codes assigned by the washer.

Service Mode

diagnostic codes1...2...3...4...

exit service mode

service test

####RPM####torque

unbalance

system check

Service Tests

user interface test

quick spin test

system check

service cycle

advance tonext step

exit servicetests

User InterfaceTest

exit userinterface test

Touch the four corners and center of the touchscreen in any order.

center

lowerleft

lowerright

upperleft

upperright

Service Tests

The service tests are identical to the LEDwasher, except instead of pressing LEDkeys, the technician can touch any of thescreens on the washer control panel toinitiate.

User Interface Tests

This will check the touch screen. Theservice technician is prompted to Touchthe four corners and center of the touchscreen in any order." When each area ispressed, the button display will reverseimage. If all areas are sensed, the controlwill display Touch screen test passed." If any area(s) is not sensed within 10seconds, the technician will be promptedto Touch the area(s) not highlighted." If the area can still not be sensed within 10seconds, the control will display Touch






The service cycle will advance the washerthrough various parts of the wash cycleand will display the following on thecontrol panel.

Cold water fillDuring the second step of the test, thetechnician will be prompted to Openand close the door and then restart bypressing start/pause .

Locking the door , Cold water andbleach fill and Warm water and bleach

fillTumbleHot water fillHot water and fabric softener fill andWarm water and fabric softener fillStatic drain

SpinCoast down and unlock at 0 RPMService cycle complete

Advance to next step : When this icon isselected during the cycle, it will advanceto the next step in the service cycle.Note: This selection is valid only if acycle is running.

Select start quick spin test or start/ pause key to begin quick spin test .

The default is that the tuning algorithm willapply, but it can be skipped. Plasterdetection will default to disabled, but canbe enabled.

Quick SpinTest

enable plasterunbalancedetection

Press "start quick spin test" or start/pausebutton to begin quick spin test

skip tuningalgorithm

cancel & exitquick spin test

start quick spin test

Quick Spin Test

cancel cycle

cancel & exitquick spin test

The following will be displayed duringthe quick spin test:

Locking the doorSpin to 350 RPMSpin to 550 RPMSpin to 600 RPMSpin to 650 RPMSpin to 800 RPMSpin to 1000 RPMCoast down and unlock at 0 RPM

Quick spin test complete

Any of the steps in this test can be held orpaused up to 30 minutes, by touching the

start/pause key ..

Skip tuning algorithm: When selected,

the tuning algorithm will be skipped. Thismust be selected before tuning.

Enable plaster unbalance detection:When selected, plaster unbalancedetection will be enabled. This must beselected before spin starts.

Cancel & exit quick spin test: thisreturns you to the service tests screen.

If the washer is already running and thequick spin test is selected on the servicetest screen, the above screen will bedisplayed.




To toggle outputs,press PAUSE and select output below

Input Statusdoor closeddoor locked

unbalance detectedwash level (low) speed

rinse level (high) sensedfill temperature

sump temperatureambient temperature

RPM

exit system check

Output Statushot water oncold water on

bleach valve onfabic softener on

drain onmotor control

on heat on

cancel cycle

help codes:1...2...3...4...5...6...7...8....9...

Diagnostic/HelpCodes

cycle countXXXX

diagnostic codes:1...2...3...4...5...6...7...8....9...

software versionXXXX

clearhelp codes

exit diagnostic/help codes

cleardiagnostic codes

SYSTEM CHECK

System checks can be run when thewasher is running a wash cycle or not. If the washer is not in a wash cycle, the

following screen will display and allow the

technician to toggle various componentsOn/Off.

At the same time, the screen will displaythe current status of the componentinputs to the control board.

If the washer is already running a cycleand the system check is activated, thenthe screen will display the status of all theoutputs and inputs to the control board.

Cancel & exit quick spin test: thisreturns you to the service tests screen.

Cancel cycle: This will stop the currentcycle.

Exit system check: This will exit thesystem check screen and revert back tothe previous screen shown on the displaypanel..

DIAGNOSTIC/HELP CODES

Diagnostic codes: Display all diagnosticcodes.

Help codes: Display all help codes.

Software version: Display currentsoftware version.

Cycle count: Display the cycle countexit diagnostic/help codes: Return toprevious screen.

Clear diagnostic codes: Clear the entirelist of diagnostic codes.

Clear help codes: Clear the entire list of help codes.

Software version: Display currentsoftware version

For a listing of available diagnostic andhelp codes, see Section 5: DIAGNOSTIC/ HELP CODE TABLES .



3-116010486 (16008373-05)Revised 2/01 Section 3. Teardown & Wiring Information

Section 3: DIAGNOSTIC/HELP CODE TABLES.

HELP CODES LISTING:

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GENERAL COMPONENT - EXPLODED VIEWComponent Identification & Location:




Add Fill This is the additional filling of thewater after the first initial fill to bring thewater level back up to the appropriate levelafter the clothes have absorbed the water.

Bleach water valve This is the coil andvalve assembly that allows water to enterthe bleach dispenser when this coil isenergized. In order for water to flow, thiscoil needs to be energized in conjunctionwith a fill water valve.

Cold water valve This is the coil andvalve assembly that allows cold water toenter the machine when this coil isenergized.

Diagnostic code A problem with asystem that is severe enough that the cyclewas stopped and it is recommended themachine be serviced.

Distribution A special acceleration profileused between the spinner speeds of 50rpm and 85 rpm which is designed toevenly distribute the clothes load.

Help code A system respondeddifferently than expected, but in mostcases did not cause the cycle to stop.

Hot water valve This is the coil and valveassembly that allows hot water to enter themachine when this coil is energized.

Intermediate Rinse This is a rinse that falls between the first rinse and the finalrinse.

Fill water valve This is a Cold water valveor a Hot water valve.

Final Rinse This is the last rinse of thecycle just preceding the final spin portionof the cycle.

Glossary of Terms First Rinse This is the first rinse followingthe main wash portion of the cycle.

Key Any Membrane switch ortouchscreen keypad.

Key press Any membrane switch keypress or touchscreen press.

Non-tempered cold This will only havethe cold water valve energized.

Non-tempered warm This will have boththe cold water valve and the hot watervalve energized.

Non-tempered hot This will only have

the hot water valve energized.

Plaster This is the point at which thecentrifugal force of the spinning action isgreater than the force of gravity so that theclothes no longer tumble, but are keptplastered against the spinner.

User activity Any key press or dooropening or closing.

Redistribution As the machine isaccelerating into spin, if it detects that theclothes load is unbalanced and wouldcause excessive vibration, it will decelerateand tumble the clothes in an attempt toredistribute them in a more uniformmanner so that vibration is reduced.

Softener water valve This is the coil andvalve assembly that allows water to enterthe fabric softener dispenser when this coilis energized. In order for water to flow, thiscoil needs to be energized in conjunctionwith a fill water valve.








Section 4. Electrical Components & Testing 4-116010486 (16008373-05)Revised 02/01 ©2001 Maytag Appliances Sales Company

SECTION 4. ELECTRICAL COMPONENTS & TESTING

ELECTRICAL TESTS

Warning - Always shut offelectrical power to the

washer before beginningany service repairprocedures.

Grounded Components

When performing service diagnostics,replacements and repairs, always check todetermine whether all ground wireslinking panel and components are

reattached if removed.

Water Valve TestThe water valve test is similar to the testoutlined in the 16008373 manual, except,to check the ohm resistance of thermistor,pull the P3 wire harness connector off themachine control and locate the P3(6) andP3(7) leads in the connector on themachine control board. Note thethermistor has been relocated on thevalve to the outlet of the valve. (See

Figure 4-1)

The thermistor is on NTC and will drop inresistance when the temperatureincreases.

Door Lock Test

The door lock can be verified by the following procedure.

LED Model1. Place the washer into Service Mode.

(See Section 2; Accessing ServiceMode)

2. Advance to the Board Output Test andpress Max Extract to Lock the doorand Extra Rinse to Unlock the door.

LCD Model1. Place the washer into Service Mode.


2. Select Service Tests, then Quick SpinTests to actuate the door lockmechanism. Hit Cancel to unlock thedoor.

Note: The relay on the control board for the door lock mechanism isdisabled if the motor control boardindicates the spinner speed is > 7RPM.

For more information related to door lockmechanism, please refer to Section 2:

Miscellaneous; Door Lock Philosophy .Fabric Softner

BleachCold

Hot

Thermistor4 Coil Water Valve

Figure 4-1




Figure 4-2

Both incoming and exiting voltage is monitored through the machine control board and

the surrounding circuitry. The following table lists the voltages for the various terminalson the microprocessor board. If proper voltage is not present, check switches andwiring for possible loose connections or open circuits by disconnecting the powersupply and performing continuity checks of individual circuits. NOTE: Connector P8(2)(White wire) is Neutral input and L1 input is the connector P6(2) (Black wire), L1 output isconnector P6(3) (Black wire).

The machince control board outputs can be verified by placing the washer into theService Mode and performing a Board Output Test. (See Section 2; Service Mode;

Board Output Test.)

Machine Control

The machine control microprocessor board is located in the control console,mounted to the plastic console. The board receives input from the membranepad/touch screen, door lock switches, and the unbalance switches. The controlalso communicates with the motor control board to facilitate the various cyclesand drive the motor for optimum performance. This is done by monitoringtorque and speed of the motor through the motor control board.

Figure 4-3


EmergencyCord

MechanicalOpener

CamSupport

Door Open/Closed SwitchDoor Lock

Spring

RotatingCam

Lamp Socket& LampDoor Actuator

Door Lock/UnlockSwitch

LockingLever

SolenoidPush-Rod

DOOR LOCK MECHANISM




INPUT/OUTPUT VOLTAGES ( LCD Washer)

INPUT/OUTPUT VOLTAGES (LED Washer)

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LCD Washer

LED Washer

Membrane Pad ChecksOn the MAH5500B washer you can perform the Membrane Pad Check with the control

console. (See Section 2; Accessing Service Mode; Membrane Pad Check)

On both washers, you can check the membrane pads, by pulling the P7 connector fromthe machine control board and locating the corresponding switch pin numbers in theribbon harness.

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DRIVE MOTOR

The drive motor is still a switched reluc-tance type motor. (For more information,

please refer to manual 16008373, Sec-tion 4; Drive Motor.)

The new motor is a sensorless motordrive system. The word "sensorless"indicates that motor direction and speeddetection are performed electricallywithout the aid of the sending device.Meaning, the sensor was eliminated fromthe end of the motor along with the wireharness leading to the RPT connection onthe motor control board.

Motor Control Access

Slight modifications were made to themotor control bracket and the plastic dripshield.

Drip Shield Removal1. Push the plastic shield on either side of

the locking tab to buckle and unlockthe shield from the motor controlbracket. (Figure 4-4)

Motor Control Board Removal1. Pull the vertical tab forward and lift the

front of the motor control board andslide the control forward to lift andremove the control from the bracket.(Figure 4-5)

MOTOR CONTROL BOARD

The motor control is able to determinethe motor's position by monitoring theactive phases in the motor. This is doneby sending pulse signals to the motor andthen timing the echo signal. By doing this,the motor control is able to deteriminethe motor speed and direction. Thisinformation is then calculated to deter-mine the motor speed.

The motor control has a software switchin it that will turn off all power devices foras long as the main voltage is above 133VAC. Once the mains voltage dropsbelow that voltage, the power devices willbe re-enabled and the motor control willresume normal operation.

2. The motor control board bracket issecured with two screws in front andsecured to the baseframe via a tab onthe bracket inserted into a slot in thebaseframe.

Figure 4-4

Figure 4-5




Motor Drive System Test

To check the system, check the board forproper output to the motor control. Thisis done by performing a board outputcheck. Then perform the Motor AndMotor Control Test.

Machine Control Board Output Test1. Place the washer into Service Mode.


2. LED Washer: Access Board OutputTest and press Stain Cycle . This willsend a signal to the motor control tooperate the motor. This will test theboard relay for 120 VAC output to themotor control board. Motor will notoperate, because the door is notlocked.

LCD Washer: Access Service Testsand press system check . Touch thescreen to toggle the motor control on.This will test the board relay for 120VAC output to the motor controlboard.

Motor Phases

With the introduction of the sensorlessmotor, the Motor Phase Test is no longerrequired. If the motor experiences aphase problem, the motor will not run.

Motor & Motor Control Test1. Disconnect power to the washer.

2. Remove the front panel and pull theJP4 Connector from the motor controlboard. (Figure 4-6)

3. Reconnect the washer power cord tosupply voltage.

4. Press Help and Back function to acti-vate Service Mode.

5. LED Washer: Select Board Output Test ; close door or push dooracturator button; touch the stain cyclemembrane switch.

LCD Washer: Select System Check;close door or push door actuatorbutton: touch Toggle Motor Control On

6. The motor control will immediatelyexecute a test routine and the motorshould run, rotating the spinner at 50rpm.

7. If the motor runs, and the spinnerrotates at the proper RPM speed: theproblem lies outside of the motor andmotor control circuit. Disconnectpower to the washer and reconnectthe JP4 Interface connector to themotor control.

If the motor runs, and the spinnerdoes not rotate: Check for missing

belt.

8. If the motor does not run:a. Check the 10 amp fuse located onthe control board, either visually orwith an ohm meter. If bad, replacemotor control/wire harness assemblycompletely. (Figure 4-7)

Figure 4-6




HEATER ASSEMBLYThe heater assembly located in the sumparea of the outer tub is only on theMAH7500, LCD washer only. A thermistorlocated in the heater assembly monitorsthe water termperature in order to cycle

the heater on/off to regulate the propertemperatures.

After the wash level has been reached, thecontrol will turn the heater on until theheater thermistor indicticates the tempera-ture reaches or exceeds the target mainwash temperature. Then the control willde-energize the heater. The heater will beturned back on when the heater thermistorindicates the temperature falls below thetarget main wash temperature 5°F duringthe main wash. The control will cycle theheater off again when the temperaturereaches the target wash temperature.

The intent is to keep the temperaturebetween the target main wash tempera-ture and 5°F below that. When the heateris off, it will remain off for at least 10 sec-onds, and when the heater is turned on, itwill remain on for at least 10 seconds. Theheater should be turned off and will re-main off when the maximum heater ontime limit is reached (37 minutes), or theend of the wash period is reached. Theheater will be turned off at the beginningof bleach fill at the end of main wash. Theheater will be turned off during add fills.

Heater Will Not Turn On1 The heater will not turn on if the door is

not closed or if there is a problem withthe door sense circuit.

Figure 4-9

9. Unplug the washer power cord andreplace motor control board connec-tor JP4 when finished.

Figure 4-8

b. If the fuse is functioning, check thesix semiconductors on the heat sinkvisually for any damage. If damaged,replace motor control/wire harnessassembly complete.c. If no visible damage is present,check motor windings for any opencircuits. (See Figure 4-8 & 4-9) Re-place motor if necessary.

Figure 4-7




Thermistor Temperature Chart

2 The heater will not turn on if there is aproblem with the low water levelsense. The control is required to seethe low water level go from not satis-

fied to satisfied at the beginning of thecycle before the heater is turned on.The heater will be turned off within 30seconds whenever the wash waterlevel becomes not satisfied.

3 The heater will never turn on for morethan the maximum heater on time of 37 minutes, and will not turn on out-side of Presoak and the main washperiod.

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5-116010486 (16008373-05)Revised 10/00

Section 5. Teardown & Wiring Information

©2001 Maytag Appliances Sales Company

SECTION 5. TEARDOWN & WIRING INFORMATION

Warning - Always shut offelectrical power to the unitbefore beginning any ser-

vice repair procedures.

The replacement console assembly consistsof the console, medallion and membranepad.

CONSOLE REMOVAL


2. Remove the four screws securing the

console to the rear cover plate.

Figure 5-1

3. Lay a drop cloth across the top coverof the washer.

4. Grasp the top of the console andgently rock the top of the console

forward away from the rear consoleback. Note the hooked tabs on bottomof the console, which engage the slotsin the top cover.

Figure 5-2

MICROPROCESSOR BOARD REMOVAL

1. Disconnect power to the washer.

2. Remove the console assembly.

3. Carefully remove the membrane padharness and other wires from the mi-croprocessor board.

Figure 5-3LCD MODEL

Figure 5-4LED MODEL

5. For reinstallation, reverse the aforemen-tioned steps.



5-216010486 (16008373-05)Revised 10/00



4. Remove the four mounting screwssecuring the board to the console.

5. Remove the board from the console.

6. Note: To avoid the potential for acci-dental static discharge damage to thereplacement board, you must beproperly grounded prior to handlingthe board. This can be accomplishedby using a special grounded strap tiedon your wrist and grounded to theproduct, or simply touching agrounded source to discharge anystatic charge build up on your person.

7. Insert the replacement board into the

console and secure the mountingbracket to the console.

8. Reattach wire harnesses and mem-brane pad harness to the replacementmachine control board.

CONSOLE COVER PLUG

The cover plug inserts into the rear of theconsole to fill a cavity void in the console.The plug is secured to the console via aconsole screw mounted directly behind it.

The cover plug simply fills a void area inthe console for cosmetic purposes only.

Figure 5-5

CABINET ASSEMBLY

The overall cabinet assembly design isidentical to the MAH4000 washer, except

for the revised door lock mechanism,door latch hoop and front shroud. for

simplicity reasons, we will address onlythe exceptions in this chapter.

DOOR LATCH HOOP

The latch hoop was redesigned, eliminat-ing the latch hoop support and spring.

REMOVAL

1. Remove the door assembly from thewasher.

2. Dissassemble the door assembly byremoving the outer door panel.

3. Locate the locking tab on the doorlatch hoop and pry the tab up.

4. Squeeze the side tabs to disengage

the locating pins on the sides of thelatch hoop from the door liner.

5. Reinstallation is a reversal of theaforementioned steps.

Figure 5-6



5-316010486 (16008373-05)Revised 10/00



DOOR LOCK MECHANISM

The door lock mechanism is now lockedand unlocked via solenoids, resulting in

faster locking and unlocking of the washerdoor. The mechanism is a non-repairable

assembly and must be replaced as anassembly.

Figure 5-7


EmergencyCord

MechanicalOpener

CamSupport

Door Open/ClosedSwitchDoor Lock

Spring

RotatingCam

Lamp Socket& Lamp

Door ActuatorDoor Lock/Unlock

Switch

LockingLever

SolenoidPush-Rod

DOOR LOCK MECHANISM

An Emergency Access Cord is availableand is accessible by removing the dis-penser bezel. The nylon cord is locatedand pulled in a direction away from thelock area. The cord is attached to themechanical opener. When the cord ispulled, the opener will pivot and push thelocking lever into the open positon.

Removal1. Disconnect power to the washer.

2. Remove the front panel, dispenserbezel and lift the top cover to exposethe door lock assembly.

3. Remove the individual wire harnesses from the assembly and the two mount-ing screws.

4. Roll the top of the door lock assembly forward and lift from the front shroudassembly.

Figure 5-8



5-416010486 (16008373-05)Revised 10/00



REAR ACCESS PANEL

Removal of the access panel gains access tothe rear components of the washer(Figure 5-9) .

Figure 5-9

WATER SYSTEM COMPONENTS

WATER VALVE

The water valve is accessible from the front of the machine. The flow rate of thevalve is 4 gpm.

Removal

1. Discontinue power and water to themachine.

2. Remove the front panel and lift the topcover.

3. Remove the wire harness connectionsto the water valve solenoids.

4. Loosen and remove the hose clampson the inlet hoses leading away fromthe water valve.

5. Locate and loosen the valve mountingscrew by turning the screw at leastthree full turns.

NOTE: The mounting screw serves as a locating pin to hold the valve in position

on the mounting bracket. By partially removing the screw, the water valve can now be slid to the left and removed fromthe bracket (Figure 5-10).

6. Carefully lift the valve with the inlethoses attached and direct the inlethoses through the openings in the valvemounting bracket.

7. The hoses can be crimped or the water

shut off at the faucets. Place a towelbelow the valve and remove the inlethoses from the water valve.

8. To reinstall, reverse the aforementionedprocedure.

PRESSURE SWITCH

The pressure switch was relocated from

the console and mounted to a bracketextension molded as part of the pumpassembly. A vertical outlet on the pumphas a rubber cap positioned over the outletwith a spout and is clamped into position.The nipple of the pressure switch is in-serted into the rubber spout. Pressuriza-tion in the vertical outlet of the pumpactuates the pressure switch and deter-mines proper fill levels.

Warning - Always shut offelectrical power to the unitbefore beginning any ser-vice repair procedures.



5-516010486 (16008373-05)Revised 10/00



REMOVAL

1. Remove the rear access panel or the front panel to access the pressureswitch.

2. Place a towel beneath the pump.

3. Remove the plastic bag covering thepressure switch. Press in the lockingtabs on the back of the pressure switchand pivot the pressure switch off thepump bracket.

4. Grasp the pressure switch and lift thenipple of the pressure switch from thepump cap.

REINSTALLATION1. Reverse the aforementioned steps 1-4.

2. IMPORTANT: Reposition the plastic bagback onto the pressure switch.

PUMP ASSEMBLY

The pump is rated at 80 watts and mountsidentically to the pump used in theMAH3000 washer. The pressure switchmounting bracket is a molded part of thepump housing. For removal instructions,see page 6-4 in the 16008373 manual.

HEATER ASSEMBLY

The 1000 watt heater is located in the tubcover below the door openning and abovethe sump area of the washer. A thermistoron the heater regulates the temperature of the heater to maintain proper water tem-perature when selected. The heater issecured to the tub cover by means of rubber compression. An inner mountingplate is located opposite of the externalmounting plate with a layer of rubberbetween. When the nut is secured, therubber is compressed and expands to sealthe heater entry hole in the tub cover.Heater resistance is 14 ohms.

Figure 5-11

Figure 5-12

Figure 5-13



5-616010486 (16008373-05)Revised 10/00



REMOVAL

1. Disconnect power to the washer.

2. Remove the wires leading to the heaterassembly.

3. Locate the mounting nut and loosen thenut by turning the nut in a counterclockwise direction. This willuncompress the rubber.

4. Carefully remove the heater assembly from the tub cover. (If the heater hasbeen in place for a period of time, therubber may have taken a set. Then acomplete tub cover removal would be

deemed necessary to push the heaterassembly out of the tub cover.)

Thermistor RemovalThe thermistor is press fitted into therubber seal of the heater. To remove,

simply push the thermistor out and reinsertthe replacement thermistor.

SUMP COVER

The sump cover is located in the lower reararea of the outer tub assembly, directlyabove the sump area and the drain outlet.The purpose of the sump cover is to cap-

ture the detergent dispensed into the topdispenser. By capturing the detergent, thewasher can provide a better mix of waterand detergent in the wash water. Duringnormal operation, the sump cover is

flushed of detergent during the wash cycle.

REMOVAL

1. Remove the front panel, tub cover andthe spinner.

2. Remove the mounting screw securingthe cover to the outer tub.

3. Lift the front of the sump cover anddisengage from rear lip of outer tub.

Figure 5-14

Figure 5-16

Figure 5-15



5-716010486 (16008373-05)Revised 10/00



WIRING INFORMATION

Please refer to the technical schematic packed in the control console in the washer for up todate wiring information for the product your are servicing. The schematics on the followingpages are only a general reference at the time this manual was printed.

MAH5500B



5-816010486 (16008373-05)Revised 10/00



MAH7500



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Maytag Neptune Manule Service