T:F . 26 - #27l,lovember 14, 1985 t

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Depa,rtment 731.A Tbronto

TECHNICAL FLASH

SEtrVICE INFOF]MATION

@AOO DUSHWASHER

Dd@DE& z'5-9900,

DEPARTT.IENI 731A _ ISRRY STDES

KENMORE DISHWASHER MODEL 753900

DELAY WASH TIMER

Model 753900 has an eight hour delay timerthat is mounted in the console. See Figure 1.This delay wash timer will delay the start of aselected dishwasher cycle up to eight hours.

A single-throw double-pole switch in thedelay timer controls the start of the dishwashercycle. See Figure 2 for the location of the delaytimer contacts in the wiring diagram. When theDELAY WASH feature is selected, contactsT to W-G are closed. lf the DELAY WASH fea-ture is not selected, the T to W-O contacts areclosed and the dishwasher will start the selectedcycle immediately.The dishwasher uses a Rapid Advance Timer.

RAPID ADVANCE TIMER

Model 753900 is equipped with a RapidAdvance Timer. This timer does not have a dialor knob. There are actually two timer motors.One is a standard-speed motor that rotates thetimer one full revolution in 68 minutes, whilethe other motor turns rapidly.

The Rapid Advance motor simply serves to ad-vance the timer cams to a predetermined star'ting position. This starting position is program-med through the pushbutton selector switch andvarious contacts in the timer itself for any givencycle selection.

This action is similar to a standard timer beingmanually advanced to a SHORT CYCLE by theuser for cycle selection.

The table in figure 3 shows how the timer is ad-vanced through the cycle for any given cycleselection.

Once the timer has advanced to the predetermi-ned starting position, the electrical circuit is bro-ken to the Rapid Advance timer motor by oneof the timer switches and one of the selectorswitches. The Rapid Advance motor stops andthe normal timer motor takes over to completethe selected cycle.

The timer is mounted behind the access panelof the dishwasher.To gain access to the Rapid Advance Timer, theaccess panel must be removed.

The timer starts all cycles, except the MlNlWASH and ECONO cycle, at increment 1 of thetimer.The POTS & PANS and NORMAL WASH cyclego through all cycles for a complete 360 rotati'on.

The RINSE & HOLD cycle goes through thefirst wash and rinse cycles only. The RINSE &HOLD cycle f inishes in increment 14 of thetimer. The Rapid Advance Motor advances thetimer to the drain cycle in increment 39. Whenthe drain cycle is completed, the timer advancesto the OFF posit ion.

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Fifure 2

Figure 1

1s . F . 2 6 - # 2 7

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CYCLE SELECTION

POTS & PANS

RINSE HOLD

NORMAL

MINI WASH

ECONO WASH

CANCEL/DRAIN

| | Timer advanced by clock motor

-l Timeradvanced by R.A. motor

REMEMBER: There is no push/pull switch.Also, since there is no timer shaft for a dial andknob, a square hole has been provided in thecam shaft to use for rotating the timer throughits cycles manually.

The timer cycles are printed on the timer (Fig.4land there is a raised step on the cam shaft that isa pointer to indicate where the timer is in thecycle.

SOUARE HOIE

Legend:

Figure 4

WA - Wetting Agent DispenserDD - Detergent DispenserTH - Thermostatic HoldF Fil l ValveD Drain

- #27

To advance the timer manually, place a screwdri-ver in the square hole and turn i t clockwise tothe desired position.

PUSH TO START SWITCH

The momentary Push to Start Switch is used tostart the cycle after a pushbutton selection hasbeen made.A circuit is completed through the door switchcontacts BK to T-BK and timer contacts WP toGY-P to the Rapid Advance Timer Motor.(Fig.5)

The t imer wil l automatical ly advance to the se-lected cycle.

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Figure 3

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CYCLE SEOUENCE

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T . F . 2 6Figure 5

DOOR SWITCH

The door switch is a SingleThrow Double-Polesruitch.With the door closed, contact is made betweenBK and T-BK providing a current path to the t i-mer and Push to Start Switch. (Fig. 6)

Figure 6

At the end of the cycle (increment 67 on thetimer sequence chart) when the door is opened,a circuit is completed through contacts BK to Rto the Rapid Advance Motor.The Rapid Advance Motor advances the timer toincrement 68 (OFF). This wil l turn the CleanLight OFF. (F ig.7)

Figure 7

The Clean Light is energized through timer con-tacts T-BK to R-BK and Pushbutton Switch con-tacts R-BK to GY-G.

Timer contacts T-BK to R-BK are closed inincrement 67 only. (Refer to timer sequencechaft).

Note: The Clean Light remains "ON" unti l thedoor is opened.

r .F . 26 - #27

INDICATOR LIGHTS

DELAY L IGHTThe Delay Light is ON when the delay timer op-tion is selected. The light remains on until thedishwasher starts in the selected cycle. TheDelay light is energized through delay timerswitch contacts T-WG. See Figure 2.

WASH LIGHTThe Wash Light is ON during the wash cycles un-til the last wash-drain, timer increment 27. TheWash Light is ener( 'zed through timer switch 32.

R I N S E L I G H TThe Rinse Light is ON during the 2 f inal r inses,timer increments 29 - 40. The Rinse Light isenergized through timer switch 23.

D R Y L I G H TThe Dry Light is ON during the HEATED drycycle, but will NOT be on if the Econo Air Dryoption is selected. When this selection is made,pushbutton contact B is closed and when timerswitch 24 closes in increment 41, it energizes theRapid Advance Timer Motor to advance the ti-mer to the Clean Light position in increment 65.

CLEAN L IGHTThe Clean Light comes ON in timer increment65. The light is energized through timer contactsT - R-BK and pushbutton switch contact Z.When refering to the pushbutton selector switchchart you will note that contact Z is closedwhen the following cycles are selected:Mini Wash, Econo Wash, Normal Wash and Potsand Pans.The Clean Light will NOT be on when the RinseHold cycle is selected.The Clean Light remains on until the dishwasherdoor is opened. With the door open, door switchcontacts BK - R are closed. A circuit is comple-ted through timer contacts R - GY-P (reset cleanlight) to the Rapid Advance motor, which ad-vances the timer to increment 68 (Off Position),opening the circuit to th€ clean ligtlt.See Fig. 7.

3

HI.TEMP LIGHTThe Hi-Temp Light has a potential circuitthrough the entire dishwasher cycle. Refer tofigure 8. The potential circuit (broken lines)exists from the timer, through the Hi-Temp lightand timer motor, to neutral.However, the timer contact that controls the ti-mer motor is closed through the entire dishwash-er cycle (except in increments 4 and 36 whichare *re thermostatic hold increments on the ti-mer).

Since current takes the path of least resistance,in this case through the timer motor, there is notenough current across the Hi-Temp light to illu-minate iti

When timer contact 22 opens in the thermosta-tic hold (increments 4 and 36) current will flowthrough the indicator light. This condition willonly occur if the water temperature is lowerthan 145o F (63'C) and the thermostat is open.See Figure 9. The indicator light will be ON butthere is not enough current across the timer mo-tor to make it run.

Figure 9

lf the water temperature is 145o F (63'C) orhigher and the thermostat is closed, a circuit willbe completed through the thermostat and the ti-mer motor will be energized, advancing the ti-mer to the next increment, closing timer con-tact22 Figure 10.

T .F . 26 - #27

Figure 10

CHECKING

The lights are neon bulbs with an internal resis-tor, so they cannot be checked for continuity.Put 120 volts AC across the leads at the indica-tor bulb disconnect plug.lf the bulb does not glow, it is bad and thewhole indicator bulb pack must be replaced.

lf the bulb does glow, look at the wiring diagramto see which contacts in the pushbutton switchand timer need to be checked to isolate the pro-blem.

REPLACEMENT

THE BULB PACK SWIEIIIDICATOR TIGHT IS REMOVEO AS SHOW]I

4

Figure I

REPIACE THEUGHTS AS SH0WX

t0TE: THE l.lcHTS AtDTHE sRACI(ET SIOTS ARETUIBEBEO. EACH TIGHTNUST BE PIACED IlI THE

STOT WITH THE NATCHITG IIUTEER.

lf damaged. the lens and bezel ara replaced asshown.

TIFT THEotD rEfisOUT.8E

SURE THEPRITTITG

FACES THErROilT WHEI

tlrsTAtutG tEw t Eils

Pinch the bezel sides together and slide out throughthe front of console. When installing new bezel, becareful not lo crack it.

Replace the bracket and light assembly and thecardboard barrier as shown. Reassemble lhe nuts.

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a o c t E E

BABRIEB

r .F . 26 - #27

SHECKING PROCEDURE

RAPID ADVANCE & DELAY TIMERMOTORS

Disconnect dishwasher from electrical source.lf the timer will not advance through the cycles,check the timer motor and/or the rapid advancemotor.Separate the motor lead wire connectionand check for continuity. lf there is infiniteresistance (open winding) replace the motor. Anormal t imer motor wil l show 1900 - 2900 ohmsresistance.

BOTH TITUIER IIOTORSABE MOUI{TED TO

TIMER WITH 2scREws

NOTE: lf the harness disconnect plug is remo-ved, the disconnect plug locking tabs MUST belocked into the timer when reassembled.

The dishwasher will not start if the delay timerdoes not advance. Check it the same way as thetimer motor and rapid advance motor. lf it isopen, replace it. The delay timer switch shouldalso be checked. The delay timer motor has tobe removed to make this check. With time set onthe timer, contacts T - WG should be closed. (lfnot, the dishwasher will start immediately.) Withno time on the delay timer, contacts T-WOshould show continuity. lf the motor is bad, re-place it.

When replacing the delay timer motor and/orswitch:1. Face the terminals on the delay t imer to-ward the back.2. Connect the wires to the proper terminals.

The disconnect plugs must be fully engaged.3. The cardboard barrier MUST be in place.The shim washer (goes on the delay timer shaft)is only used to al ign the dial in the console ope-n ing.

OELAYTIMERMOTOR

DETAY TIMERswtTcH

coiri R0tERACKET

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ERAC

Select Cycle and OptionCYCLES: 10 PUSHBUTTON MODEL

Firmly press the correct button forthe cycle you wish and push option selection button for d€sired option oroptions. Set D€layWash if desired. Push start button. When the Delay indicator light is on, the dishwasher lvash aclion will detay for tho timeshown in the window.

READ THIS CHART TO DECIDE WHICH CYCLE YOU SHOULD USE.CYCLE USE THIS CYCL€ FOR: WHAT HAPPENS lN THE CYCLE

TiM€R O€LAYS IF WATER IS NOT PROPERTEMP WATER HEATING HI.TEMP LIGHT IS ON

POTS& PANS

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Exlra washing action forheavy or cooked on soals

ln thrs cycle, lhe dishwashsr will aulgmatically heat lhe water inthe first and se@nd wash€s, and in lhe final rinse, if the water isnot lhe proper temperature.Cycle lime: Approximately 1 -1 /2 lo 2 hours, dependang on lhelame needed to heal the water.

RINSEHOLD

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Rinse partial loads which will bewashed later.

Crcle t ime: Approximately 10 minut€s.

NORMAL

lgltA double wash for normally soiledloads.

Cycl€ time: Apprcxamatoly 60 minut€sClean

Light On

CleanLight On

Cycle time: Appfoximately t4 minutes.

For normal. everyday sotledloads. (The ENERGUIDE labeldata is based on th is cvcle) .

ECONO

rgfMINIWASH

MINI

lsplt

Wash very lightly soiled dishessuch as sandwich olales.desserl dishes, etc.NOTE: Belore startingdishwasher, run water al stnkuntil il is hot.

ffiCycle trme: Approxrmalely 55 minutes

CleanLighl On

CANCELANODRAIN

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NOTE: When a cycle is cancelled, the timer will rapidly advance to a drain. You ryill hgar "clicks ' as lhe timor movosto the drain gosition. This is a normal sound. At the end of a complete wash cycle, the CLEAN indicator lightwill come on. To turn ott the CLEAN lighl, open the dishwasher door

Cancelling a cycle andselecting a ngw one

orTurning otl the dishwasher inth€ middl€ of a cycle anddraining b€fore selecling a newcycle

orTurning otl the CLEANindicalor lighl.

It you have selocted a cycle and lhon change your mind, pushihe Cancel butlon. This cancels lhe cycl6. Any waiot in lhodishwasher willdrain oulolthe tub. Thistakes ugto2 minules.The "Rinse" lighl will glow during this timo. When lhe drain iscompleted, all lights will 9o ofi, and a new cyclo may bosslectod.lf you have selected a cycle and don'l want to complete it. pushthe Cancel and Drain bunon. When you restan the dishrvasher,select a cycle. The new cycle will starl ftom ths beginning.Check th6 detergont dispenser. lt may need lo be retillod.

7T.F . 26 - #27

CYCLE SELECTION HI-TEMP

POWER MISER SELECTOR SWITCH DEI,-AY WASH CONTROL

START BUTTON

INOICATOR LIGHTS

Options

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U ><cYcLEs I OPToNS

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{F ilj;'.=#i"When this option is selected, water for lhe main wash and final rinse is heated to 145o F. (630 C.).As lhe watei is heated, the Water Heat Light glows and washing action continues. The cycle timewill be extended untilthe water reaches this t€mperature. lttakss about one minute to raise watertemperature one degree. This option is intended for use when washingh€avily soiled dishes.WATER HEAT Option cannot be selected with LIGHT WASH or RINSE HOLD cycles.

\HI.TEMP

HOTRINSE

Whsn this oplion is selected, the water forthe tinal rinse will be heated to 145o F. (630 C.). As thswater is h€ated, the water Heat Light glows and rinsing action continues. The cycls time will beext€nded until the water reaches this temperature. Us€ this option to help dry dishes faster andreduce spotting.

ITJ 5F:'"Push Air Dry button. Eliminates heat in the dry cycle. Leave the washed dish load in the latcheddishwasher lor several hours or overnight. Or, open the door fully for a few seconds to allow steamto escape. Raise the door to a closed position. Allow dishes to dry for several hours. No.hoatdrylng may rerult in som€ sponing ot glasse! or silver. liems which do not dry,easily (such asplastics) may n€ed towel drying.

CANCELOPTION lf you want to change an option, press the Cancel Options bunon. A new option may be selected.

DEI-AYWASH

Delay Wash can be used when you want the dishwasher cycle to slad 1/2 to I hoursalter the dishwasher is loaded. For example, use Delay Wash to set the dishwash€rcycle to run in otf-peak hours ot olectrical use.

To set Delav Wash:1. Close the door tlrmly,2. Seloct the number of'hours (trom 1/2 to 8 hours) you want the dishwasher to wait

before the cycle starts.3. Turn the Deliy Wash Control down until the window shows the number of hours you

s€lected. The-control can be moved up or down to change your selection. lf you aresenino a delav time less lhan t hour, turn the control knob to t hour then back to thedesire? time.'The Delay indicator light will glow when the Delay Control is set.

4. Firmly press the button for the desired cycle.5. Press the desired Options bunon(s).6. The Delay indicator light will glow until the dishwasher cycle starts. The Delay

Wash window will shot the ap,roximate lime remaining before the cycle begins.You can add an item to the dishwasher load il the Delay or the Wash indicalorlights are on. Close the door firmly.

Indlcstor LlghtgThese lights-glow during ditt€ront portions of the cycle to lel you know what yourdishwasher is doino. The Drlry liqht olows when the dishwashot cycle is s€l to come onat a later time. Th;Washb tioniqbws until the last wash drains-. The Rlnr. v, lightglows during the two final rinse6. The Dry U light glows during hsated drying, but isbtf ifthe Econo Alr Dry option is selected. The Clcan ;c' light glows when the dishwashercycle is completo. To turn otf the Clcan light, open the dishwasher door

The Hl-Tempdl light will glow to let you know that the dishwasher is delaying f.or waterheating. Waier he-ating oCcurs durrng the Pots and Pans cycle and rvhen th€ Hi-Temp .Wash is selected. The length of time lhis light slays on depends upon the temp€rature olthe water enlering the dishwasher. The lower the water temperalure, the longer tho lightwilt stay on and the longer the dishwasher will operale. Note: Thc llght wlll not comcon lf thc watcr lg at the corroct temp€ralurc,

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