Service Manual (9K & 12K 115V)

ON OFF/ MODE

FA N

C LOCK TIMER ON

X-F AN T EMP TIMER OF F

T URBO SLEEP LIGH T

34 34

34 34

CFM 7 7

14.2 1 2/9.8

1 1W H D 4 0 4 0

9 8 9 8

0 0

W H D 5 22.8 14.2 5 22.8 14.2l 96 110 96 110

16 16oz/ft 0.1613 0.2150

33 3366 66

6 960

6 960

12.5 12.5/9.6

1 1W H D 4 0 4 0

lb. 29/38 9/38

3 3

W H D 5 22.8 14.2 5 22.8 14.2l 107 118 107 118

5.5 5.516 16

oz/ft 0.1613 0.1613

33 3366 66

6 6

6 6

12.5 12.5

1 1W H D 4 0 4 0

l 9 8 9 8

CFM

3 3

W H D 5 22.8 14.2 5 22.8 14.2l 107/118 107/118

5.5 5.516 16

oz/ft 0.1613 0.1613

33 3366 66

0

2

4

6

8

10

12

14

16

18

20

09K

12K

0 10 20 30 40 50 60 70 80 90

Compressor speed (rps)

Cur

rent

(A)

0

2

4

6

8

10

12

14

16

18

20

0 10 20 30 40 50 60 70 80 90 100

Compressor speed (rps)

Cur

rent

(A)

09K

12K

ConditionIndoor:DB80 F WB67 FIndoor air flow: TURBOPipe length: 16ft.

O O

ConditionIndoor:DB70 FIndoor air flow:TURBOPipe length: 16ft.

O

0

2

4

6

8

0 15 20 30 40 50 60 70 80 900

2

4

6

8

0 15 20 30 40 50 60 70 80 90 100

12K12K

ConditionIndoor:DB80 F WB67 FIndoor air flow: TURBOPipe length: 16ft.

O O

ConditionIndoor:DB70 FIndoor air flow:TURBOPipe length: 16ft.

O

Compressor speed (rps) Compressor speed (rps)

Cur

rent

(A)

Cur

rent

(A)

40

30

20

Indoor side noise when blowing

Outdoor side noise

Indoor fan motor rotating speed

Low Middle High

Compressor frequency/Hz

35

25

Turbo

Noi

se/d

B(A

)

Noi

se/d

B(A

)

80 1006040200

70

60

50

40

30

89.60

20

40

60

80

100

120

91.4 93.2 95 96.8 98.6 100.4 102.2 104 105.8 107.6 109.4 111.2 113

0

20

40

60

80

100

120

5 8.6 11 12.2 19.4 23 26.6 30.2 33.8 37.4 41 44.6 48.2 51.8

09K

12K

09K

12K

40

30

20

Indoor side noise when blowing

Outdoor side noise

Indoor fan motor rotating speed

Low Middle High

Compressor frequency/Hz

35

25

Turbo

Noi

se/d

B(A

)

Noi

se/d

B(A

)

20

70

60

50

40

30

80 1006040200

TINU ROODTUOTINU ROODNI

HEATEXCHANGE(EVAPORATOR)

HEATEXCHANGE(CONDENSER)

COMPRESSOR

GAS SIDE

3-WAY VALVE

LIQUID SIDE

2-WAY VALVE

COOLING

Accumlator

Discharge

Suction

Muffler

Electronic Expansion Valve Strainer

TINU ROODTUOTINU ROODNI

HEATEXCHANGE(EVAPORATOR)

HEATEXCHANGE(CONDENSER)

COMPRESSOR

GAS SIDE

3-WAY VALVE

LIQUID SIDE

2-WAY VALVE

COOLINGHEATING

Accumlator

Discharge

Suction

Muffler4-Way valve

Strainer Electronic Expansion Valve Strainer

L-OUT

L1

L1

0 0

RT1 RT2

M2

JUMP

CAP

TEM.SENSORROOM TUBE

TEM.SENSOR

FAN MOTOR SWING MOTOR(U.D)

AP2

SWING-UD

K4

TUBEROOM

AC-L

PGPGF TR_OUT TR_IN

TC

TRANSFORMER

13

DISPLAYAP1

CN1 CN2

DISP2DISP1

M1

GG

XT1W4 BU

W3 BN

N(1)

OUTD

OOR

UNIT2

3COM-OUT

W1 YEGNW2 YEGN

NW5 BK

III

ELECTRIC BOXEVAPORATOR

COMP

M

RT500

RT40

RT3

OUTROOM EXHAUSTOUTTUBE

OFAN

E OVERHEAT

R E

CS

U V W

CT1,2

AP1

W 3 YEGN W10 RD

COMP

W8 YEGN

FAN MOTOR

W5 BU W 6 YE W7 BK

AC-N1

AC-L1

COMU

EKV

CN1

TEM.SENSOROUTROOM EXHUAST

TEM.SENSORTEM.SENSORTUBE

W 2 BU

W1 BN

W4 BK

GGI

NDOOR

UNIT

W13 YEGN

POWER

N

L

L

N

N(1)

3

2

L2L2L2

L1

L1

G

G

G

W15 BU

W14 BN

W16 WH

W17 RD

G

L4

L4

W23 OGW20 BU

W22 WH

W21 BN

AC-L2 AC-L4AC-N5AC-N3 AC-N4 AC-L2AC-L3

W19 BU W24 RD

W 18 YEGN

XT2

34

E21

FILTER

C4C3212

1

4YV

RT500

RT40

RT3


OFAN

E OVERHEAT

R E

CS

U V W

CT1,2

AP1

W3YEGN W10 RD

COMP

W8 YEGN

FAN MOTOR

W5 BU W 6 YE W 7 BK

AC-N1

AC-L1

4V AC-N2

COMU

EKV

CN1



W2 BU

W1 BN

W4 BK

GGI

NDOOR

UNIT

W13 YEGN

POWER

N

L

L

N

N(1)

3

2

L2L2L2

L1

L1

G

G

G

W15 BU

W14 BN

W16 WH

W17 RD

G

L4

L4

W23 OGW20 BU

W22 WH

W21 BN

AC-L2 AC-L4AC-N5AC-N3AC-N4 AC-L2AC-L3

W19 BU W24 RD

W18 YEGN

COMP

M

XT2

34

E21

FILTER

C4C3212

1

4YV

RT500

RT40

RT3


OFAN

E

OVERHEAT

R E

CS

U V W

CT1,2

AP1

W3YEGN

W10 RD

COMP

W8 YEGN

FAN MOTOR

W5 BU W6 YE W 7 BK

N1

AC-L1

4V AC-L2 AC-L3 N2 N3

L

COMU

W9 BU

W11 OG W12 WH

EKV

CN1



W2 BU

W1 BN

W4 BK

GG

INDOOR

UNIT

W13 YEGN

POWER

L1

L

N

N(1)

3

2

L2L2L2

L1

L1

G

G

G

W15 BU

W14 BN

L1

L2

G

COMP

M

XT2

COMP

M

RT500

RT40

RT3


OFAN

E

OVERHEAT

R E

CS

U V W

CT1,2

AP1

W3YEGN

W10 RD

COMP

W8 YEGN

FAN MOTOR

W5 BU W 6 YE W 7 BK

N1

AC-L1

AC-L2 AC-L3 N2 N3

L

COMU

W 9 BU

W11 OG W12 WH

EKV

CN1



W2 BU

W1 BN

W4 BK

GG

INDOOR

UNIT

W13 YEGN

POWER

L1

L

N

N(1)

3

2

L2L2L2

L1

L1

G

G

G

W15 BU

W14 BN

L1

L2

G

XT2

1 2 3 4 5 6

7

8

9

10

11

12

1

2

3

4

7

5

68 9 10 11 12

13

14

15

16

171819202122

22

21

20

19

18

17 16 1514 13

1211

109

8

7654321

1

7

8

4

3

5

6

11

13

12

16

17

18

10

14

9

15

2

2

8

9

10

34

11

12

7

6

13 14

5

1

ON/OFFPress it to start or stop operation.MODEPress it to select operation mode (AUTO/COOL/DRY/FAN/HEAT).+Press it to increase temperature setting.-Press it to decrease temperature setting.FANPress it to set fan speed.

Press it to set swing angle.TIMER ONPress it to set auto-on timer.TIMER OFFPress it to set auto-off timer.CLOCKPress it to set clock.

X-FAN(X-FAN is the alternative expression of BLOW for the purpose

of understanding.)

TEMPTURBOSLEEPLIGHTPress it to turn on/off the light.

17

15

18 19

1620

21

23

24

22

25

MODE icon:If MODE button is pressed, current operation mode icon (AUTO), ( COOL), (DRY), (FAN) or (HEAT is only for heat pump models) will show.SLEEP icon : is displayed by pressing the SLEEP button. Press this button again to clear the display.TEMP icon:Pressing TEMP button, (set temperature), (indoor ambient temperature), (outdoor ambient temperature) and blank is displayed circularly.Up & down swing icon: is displayed when pressing the up & down swing button. Press this button again to clear the display.

20

21

22

23

24

25

1

2

3

4

5

6

19 LIGHT icon: is displayed by pressing the LIGHT button.Press LIGHT button again to clear the display.LOCK icon: is displayed by pressing "+" and “-” buttons simultaneously.Press them again to clear the display.SET TIME display:After pressing TIMER button, ON or OFF will blink.This area will show the set time.TURBO icon: is displayed when pressing theTURBO button.Press this button again to clear the display.DIGITAL display:This area will show the set temperature. In SAVE mode,"SE" will be displayed. During defrosting operation, “H1” will be displayed.X-FAN icon: is displayed when pressing the X-FAN button. Press this button again to clear the display.FAN SPEED display:Press FAN button to select the desired fan speed setting(AUTO Low-Med-High).Your selection will be displayed in the LCD windows,except the AUTO fan speed.

ON/OFF:Press this button to turn on the unit. Press this button again to turn off the unit.MODE:Each time you press this button,a mode is selected in a sequence that goes from AUTO, COOL,DRY, FAN, and HEAT *, as the following:

*Note: Only for models with heating function.After energization, AUTO mode is defaulted. In AUTO mode, the set temperature will not be displayed on the LCD, and the unit will automatically select the suitable operation mode in accordance with the room temperature to make indoor room comfortable.+ :Press this button to increase set temperature. Hold it down for above 2 seconds to rapidly increase set temperature. In AUTO mode, set temperature is not adjustable.-:Press this button to decrease set temperature. Hold it down for above . 2 seconds to rapidly decrease set temperature. In AUTO mode, set temperature is not adjustable.FAN :This button is used for setting fan speed in the sequence that goes from AUTO, , , to then back to Auto.

Press this button to set up & down swing angle, which circularly changes as below:

This remote controller is universal. If any command , or is sent out, the unit will carry out the command as indicates the guide louver swings as:

AUTO

COOL DRY FAN HEAT*AUTO

Low speed Medium speed High speed

OFF

8

9

10

11

12

13

14

15

16

7 TIMER ON:Press this button to initiate the auto-ON timer. To cancel the auto-timer program, simply press this button again. After pressing this button, disappears and "ON" blinks . 0 0:00 is displayed for ON time setting. Within 5 seconds, press + or - button to adjust the time value. Every press of either button changes the time setting by 1 minute. Holding down either button rapidly changes the time setting by 1 minute and then 10 minutes. Within 5 seconds after setting, press TIMER ON button to confirm.TIMER OFF:Press this button to initiate the auto-off timer. To cancel the auto-timer program, simply press the button again.TIMER OFF setting is the same as TIMER ON.CLOCK :Pressing CLOCK button, blinks. Within 5 seconds, pressing + or - button adjusts the present time. Holding down either button above 2 seconds increases or decreases the time by 1 minute every 0.5 second and then by 10 minutes every 0.5 second. During blinking after setting, press CLOCK button again to confirm the setting, and then will be constantly displayed.X-FAN:Pressing X -FAN button in COOL or DRY mode,the icon is displayed and the indoor fan will continue operation for 10 minutes in order to dry the indoor unit even though you have turned off the unit.After energization, X-FAN OFF is defaulted. X-FAN is not available in AUTO, FAN or HEAT mode.TEMP:Press this button, could select displaying the indoor setting temperature or indoor ambient temperature.When the indoor unit firstly power on it will display the setting temperature, if the temperature's displaying status is changed from other status to" ",displays the ambient temperature, 5s later or within 5s, it receives other remote control signal that will return to display the setting tempera-ture. if the users haven't set up the temperature displaying status,that will display the setting temperature.TURBO:Press this button to activate / deactivate the Turbo function which enables the unit to reach the preset temperature in the shortest time. In COOL mode, the unit will blow strong cooling air at super high fan speed. In HEAT mode, the unit will blow strong heating airat super high fan speed. SLEEP:Press this button to go into the SLEEP operation mode. Press it again to cancel this function. This function is available in COOL, HEAT (Only for models with heating function) or DRY mode to maintain the most comfortable temperature for you.LIGHT:Press LIGHT button to turn on the display's light and press this button again to turn off the display's light. If the light is turned on , is displayed. If the light is tunrned off, disappears.Combination of "+" and "-" buttons: About lockPress "+ " and "-" buttons simultaneously to lock or unlock the keypad. If the remote controller is locked, is displayed. In this case, pressing any button, blinks three times.Combination of "MODE" and "-" buttons:About switch between Fahrenheit and Centigrade At unit OFF, press "MODE" and "- " buttons simultaneously to switch between ℃ and ℉.

Replacement of Batteries1.Remove the battery cover plate from the rear of the remote controller.(As shown in the figure)2.Take out the old batteries.3.Insert two new AAA1.5V dry batteries, and pay attention to the polarity.4. Reinstall the battery cover plate.★Notes:●When replacing the batteries, do not use old or different types of batteries. Otherwise, it may cause malfunction.●If the remote controller will not be used for a long time, please remove batteries to prevent batteries from leaking.●The operation should be performed in its receiving range.●It should be kept 3.3ft. away from the TV set or stereo sound sets.●If the remote controller does not operate normally, please take thebatteries out and reinsert them after 30 seconds. If it still can't operate properly, replace the batteries.

Sketch map forreplacing batteries

Freezerying

ryingry

rying

Start cooling

Stop cooling

Compressor

Original working state

Run Stop

Outdoor fan

Indoor fan

Tpreset

Tamb

6 minutes 6 minutes3 minutes

Tpreset-35.6 F

set fan speed

o

For 115V: frequency-decreasing protection when total current is increasing:When total current Itotal A, increase frequency is allowed; when total current Itotal B, increasing frequency is prohibited; when totalcurrent Itotal C, the unit operates by decreasing frequency. When total current Itotal D, the compressor stops operation, and indoorfan will stop operation after 30s.


For 230V: frequency-decreasing protection when total current is increasing: When total current Itotal A, increase frequency is allowed; when total current Itotal B, increasing frequency is prohibited; when total current Itotal C, the unit operates by decreasing frequency. When total current Itotal D, the compressor stops operation, and indoor fan will stop operation after 30s.


L1 A1 B1 C1 D1

L A B C D

Heating angle Cooling angle

O(0°) O(0°)

2

33 66

Space to the wall

Space to the ceiling

Space to the wall

Space to the wall

Air outlet sideAbove

5.9in. Above 5.9in. Above

11.8in. Above

19.7in. Above

19.7

in. A

bove

11.8i

n. Abo

ve

78.7in. Above

Above

Space to the obstruction

Air outlet side

Space to the wall

Air inlet side

The dimensions of the space necessary for correct installation of the appliance including the minimum permissible distances to adjacent structures

●

5.9in.

118.1in.

Indoor Outdoor Wall pipe

Seal pad

bulgedistortion

outlet pipe of indoor unit

insulating tubeconnected

insulating tube

drain hoseoutlet pipe of indoor unit

drain hose



rubber belt

rubber beltrubber belt

Flooded

Fig.2

Wiring Cover

outdoor unit connection

yellowgreenbrown

N(1)

black

2 3

blue

Ф2.2 in.

59.1ft.

Fig.1

Wall WallMark on the middle of it Gradienter

Left Right

(Rear piping hole) (Rear piping hole)

Space to the wall

above

Space to the wall

above

Ф2.2 in.

59.1ft.

Fig.5

Mountingplate

Fixing hook Mounting plate

Right

Right rear Fig.4Left rear

Left

Fig.3Tailing 1Tailing 2

Finally wrap itwith tape

Gas side pipinginsulation

Water drainage pipe

Liquid sidePiping insulation

Gas side pipeExternal connection

electric wireLiquid side piping

Spanner Torque wrench

PipingTaper nutIndoor unit piping

PowerIndoor unit connection

Indoor unit connection

blueyellow-green

black brown

Power

blueyellow-green

black brown

GL2L1

NL

GWH09MA-A3DNA1A/O/GWC09MA-A3DNA1A/OGWH12MB-A3DNA1A/O/GWC12MB-A3DNA1A/O

GWH12MB-D3DNA1A/O/GWC12MB-D3DNA1A/O

Fig.6

Manifold ValveMultimeter

-76cmHg

Lo Handle

Charging hose

Manometer

Hi handle

Vacuum pump

Low pressure valve

Drain-water holeBottom frame

Hose (available commercially,inner dia. 0.6in.)

Drain connecter

Fig. a

filter

Air filter

Fig. b

Fig. c

Healthy

2 3 4

1716

1514

1312

1110

8

7

2423

22

2019

1

6

5

9

18

36

34

35

33

32

31

30

29

28

21

3940

41

38

252726

37

42

1

2

3

4

5

6

7

8 9 10 11 12 13 14 15 16 17 18 19 20

21

22

23

24

25

26

27

28

29

32 31 30

8

2120

61 42 3 5 7

19

10

1211

13

15

1817

14

16

22

31

3029

28

27 26 25 24

9

23

7

2019

1 42 3 5 6

18

9

1110

12

14

1716

13

15

21

29

27

28

33

3231

30

26 25 24 23

8

22

23

9

24252627

31

3233

34

29

28

30

22

16

14

1718

15

13

1112

10

19

7532 41 6

2021

8

The remotecontroller doesnot receivesignals (after itis powered, thebuzzer willsound, unless ithasmalfunction)

Trip of breaker orblow of fuse

Air

cond

ition

er c

an n

otst

art u

p

Measure insulation resistanceto ground to see if there is anyleakage.

The circuit or the part of the airconditioner has malfunction.They heat and break the insula-tion and lead to short circuit orcreepage. Measure the insula-tion resistance or eliminate themalfunction one by one. If thebreaker itself has malfunction,then replace the breaker.

The transformer connection isloose or has bad contact or thetransformer has malfunction.

Fasten the wiring; measure theoutput voltage of the trans-former , if it is incorrect, changethe transformer.

No power Check power supply circuit.

Power plug is not well plugged inand poor connection.

Check if the plug is properlyplugged in and make the loosecontact firm.

Fuse of controller burnt out

The air condi-tioner does notreact after it ispowered ( afterthe plug isinserted, thebuzzer does notsound and theremote startuphas noresponse)

Remote controller malfunction

Receiver loose or poor connection

Receiver is broken

Change controller fuse

Controller is broken Check remote controller

Remote controller is short of power Change batteries

First, press the manual switchbutton AUTO,i f there is noresponse,check based on theabove methods. If it runs nor-mally after pressing the button,check again whether the instal-lation position and the connec-tion wire of the reception headis correct. If it is correct,then re-place the receiver or the remotecontroller.

Power voltage is too lowCheck the voltage. If it is lower than 10% ofthe rated voltage, check the cause, improvethe power supply condition and add the sta-bilized voltage power supply.

The breaker trips at once when itis set to “ON”.

The breaker trips in few minuteswhen it is set to “ON”.

Improper set of temperature Adjust set temperature

If cooling (heating) load isproper

Check the forecasted load of cooling (heating)

The refrigerant has leakage or isinsufficient

Check and f i l l the leakage, thenvacuumize it and supplement the re-frigerant as required

Leakage between the high pres-sure and the low pressure in-side the compressor

Replace the compressor

Malfunction of four-way valve Replace the four-way valve

Local block of capillary Replace the capillary

Blockage of cooling system

Judge whether the system is blocked byobserving the condensation of evapora-tor and the pressure value of the highpressure manometer and take measuresto deal with the system.

Malfunction ofr e f r i g e r a n tflow

Heat insulation for the connectionpipes of the indoor unit and the out-door unit is bad.

Make sure that heat insulation for the thick and thin pipesis good. Heat insulation must also be provided for thejoint andthe exposed part of the copper pipe .

Block of outdoor heat ex-changer

Clean the dust accumulated on the surface ofthe heat exchanger.

Air filter were blocked Clean the filter

Fan speed was set too slowTo set the fan speed to high ormiddle speedAir circulation

is insufficient

Fan rotation speed becomeslow

Capacitordamage

Motor damage

Replace the capaci-tor

Replace the motor

The installation position of theoutdoor unit is not appropriate.

Good ventilation must be provided for theinstallation position of the outdoor unit.

The outdoor temperature is too high. Properly install the rainproof plate or the sunproof plate. If themaximum cool air still can not meet the requirement, it is sug-gested to replace the air conditioner.

Keep certain air tightness indoors, try not to useelectricalappliance with large quantity of heat

The air tightness is not enough. Peoplecome in and out too frequently. Thereare heating devices indoors.

Poo

r CO

OL(

HE

AT) o

pera

tion

The indoor fan motor is burned orbreaks or has the heat protectormalfunction.

Replace the fan motor or the defective part.

Wrong connectionMake the correction connection based onthe circuit drawing.

The fan capacitor has open circuit oris damaged.

The fan does notrun when it is setto supply air.

Replace the fan capacitor of the same typeand same specification.

The outdoor fan motor is damaged. Replace the fan motor

Wrong connection Make the correct connection based on thecircuit drawing

The outdoor fan capacitor is damaged. Replace the fan capacitor

Malfunction of compressor Replace the compressor

Breakage of running capacitor ofcompressor Replace the capacitor

The voltage is too low or toohigh.

Manostat is recommended.

Wrong wire connection Connect the circuit diagram correctly

The built-in heat protector of themotor breaks frequently because themotor is abnormal.

Replace the fan motor

Adjust the volume of the refrigerantThe refrigerant is not enough or is toomuch.

Replace the capillaryThe capillary is blocked and the tem-perature rises.

The compressor does not runsmoothly or is stuck. The air dischargevalve is damaged


The protector itself has malfunction. Replace the protector

The compres-sor is too hotand leads to theaction of theprotector.

The protector itself has malfunction.Use the multimeter to check whether thecontact of the compressor is on when it isnot overheated. If it is not on, then replacethe protector

In the cooling andheating mode,the compressorruns, but the out-door fan does notrun.

In the coolingand heatingmode, theoutdoor fanruns, but thecompressordoes not run.

Adjust fan locationFan of indoor unit contacts other parts

Foreign object in indoor unit Take out the foreign object

Adjust support washer of compressor, andtighten loosen screws

Touch of pipeline of outdoor unit Separate the touching pipeline.Abnormal soundand shake

Touch of inner plates1. Tighten connect screw.2. Stick absorbing clay between plates.

Louver of outdoor unit touched outercase. Adjust location of louver.

Abnormal sound inside compressor Change compressor

Drainage pipe blocked or broken Change drainage pipe

Re-wrap and make it tight.Wrap of refrigerant pipe joint is notclose enough.

Water leakage

Change controller

Wire loose or wrong connection

In cool, heatmode, theoutdoor unitand compres-sor will not run.

Correctly wire according to the drawing

Improper setting of temperature Adjust setting temp.

Contro l ler mal funct ion ( IC2003broken, creepage of parallel capaci-tor of relay loop, relay is broken etc.)

First, check whether the connection iswrong. If no, replace the partsThe swing fan

does not run.

The torque of the swing motor is notenough

Wrong connection

The controller is damaged(IC2003 isdamaged, the swing relay can notclose, etc)

Compressor shakes too much

N

Y

N

Y

N

Y

N

Y

N

Y

Turn on the unit and wait 1 minute

Use DC voltmeter to measure the

voltage on the two ends of electrolytic

capacitor

Voltage higher than 200V?Fault with the voltage

testing circuit on control panel AP1

Replace the control panel AP1

Measure the AC voltage between terminal L and N on wiring board XT(power supply)

Voltage within 210VAC~250VAC?

Shut down the powerand repair the powersupply to restore therange210VAC~250VAC

power on andrestart the unit

If the fault is eliminated?

Shut down the power and wait 20 minutes; or use DC voltmeter to measure the voltage on the two ends of capacitor (test3), until the voltage is lower than 20V

Check the connection of reactor (L in the Electrical Wiring Diagram)

If the wiring of reactor L is normal?

Connect the reactor Laccording to Elec-trical Wiring Diagr-am correctly

Re-energize andturn on the unit


End


Energize and switch on

IPM protection occurs after the

machine has run for a period of time?

Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT)

If the voltage between terminal L and N on wiring board XT is within 210VAC~250VAC?

Check the supply voltage and restore it to

210VAC~250VAC

Voltage between the two ends of celectrolytic

capacitor (test3) is

Restart the unit. Before protection occurs, use DC voltmeter to measure the voltage

between the two ends of electrolytic capacitor on control

panel AP1 (test3)

If the unit can work

normally?

Please confirm: 1. If the indoor and outdoor heat exchangers are dirty? If they are obstructed by other

objects which affect the heat exchange of indoor and outdoor unit. 2. If the indoor and outdoor fans are working normally?

3. If the environment temperature is too high, resulting in that the system

pressure is too high and exceeds the

permissible range? 4. If the charge volume of refrigerant is too much, resulting in that the system pressure is too high?

5. Other conditions resulting in that the system pressure becomes too high.

The connection of capacitor C2

is loose.

Reconnect the capacitor C2 according to Electrical Wiring Diagram. Then, Restart theunit.

Stop the unit and disconnect the power supply. Wait 20 minutes, or use DC voltmeter to measure the voltage

between the two ends of capacitor C2, until the

voltage is lower than 20V

Replace the capacitor C2. Then, energize and start the unit.


Take corrective actions according to Technical Service Manual, and

then energize and start the unit.

If there is any abnormality

described above?


If the connection between AP1 and COMP is unsecure or the connection order is wrong?

Connect the control panel AP1 and compressor COMP correctly according to the Electrical Wiring Diagram. Then, energize and start the unit.

Use ohmmeter to measure the resistance between the three terminals on compressor COMP, and compare the measurements with the

compressor resistance on Service Manual.

If the resistance is

normal?

Use ohmmeter to measure the resistance between the two

terminals of compressor COMP and copper tube.


COMP

Resistance higher than 500MΩ?

Replace the control panel

AP1

END

Y N

YN

Y

N

Y

If the unit can work normallv? Y

If the unit can work normally? Y

N

N

Y

N

If the unit can work normally? YY

N N

If the unit can work

normally?Y

Y

N

Y

N

N

Y

higher than 250V

Remove the wires on the two ends ofcapacitor C2. Then,use capacitancemeter to measurethe capacitor C2.Verify as per theParameters Sheet.

Stop the unit and disconnect the power supply. Then, check the connection ofcapacitor C2according to ElectricalWiring Diagram.

If capacitorC2 is failed?

Refer to the Electrical Wiring Diagram and check if the connectionbetween AP1 andCOMP is loose and ifthe connection orderis correct.

End

Y

N

Y

N

Y

N

Overheat and high temperature protection

Is outdoor ambient temperature higher than 53?

20 minutes after the complete unit is powered off.

Is heat dissipation of the indoor unit and outdoor unit abnormal?

Normal protection, please operate it after the outdoor ambient temp-erature is normalized.

Improve the heat dissipation environ-ment of the unit

Does the outdoor fan work normally?

1. Check if the fan terminal OFAN is connected correctly2. Resistance between any two terminals is measure by an ohm gauge and should be less than 1K Ohm.


Replace the fan capacitor C1

Replace the outdoor fan

Y

N

Y

N

N

Y

Y

N

Power on the unit

Is stop time of the compressor longer than 3 minutes?

Restart it up after 3 minutes

Does startup fail?

Are the wires for the compressor connected correctly? Is connection sequence right?

Connect the wires as per the connection diagram




End

Out of step occurs once the unit is powered on.

Is stop time of the compressor longer than

3 minutes?

Are the wires for the compressor connected correctly? Is connection sequence right?

Is the connection made in clockwise direction?

Connect the wires correctly




End

Out of step occurs in operation

Is the outdoor fan working normally?

Is the outdoor unit blocked by foreign objects?




End

Check if the fan terminal OFAN is connected correctly

Remove foreign objects

Replace the fan capacitor C1

Replace the outdoor fan

20 minutes after the complete unit is

powered off

Is the terminal FA for the electronic expansion valve

connected correctly?

Connect the wires correctly

Resistances between the first four pins close to the terminal hole and the fifth pin are almost the same, less than 100 ohm.

Replace the electronic expansion valve



Replace the control panel

AP1

Coolant leakage, refilling the coolant

End

Y

Y

N

N

N

N

N

N

Y

Y

Y

Start

Check wiring of the reactor (L) of the outdoor unit and the PFC capacitor

Whether there is any damage or

short-circuit?

Replace it as per the wiring diagram and

reconnect the wiresIf the fault is eliminated?

Remove the PFC capacitor and measure resistance

between the two terminals.

Is the resistance around zero?

The capacitor is short circuited and

the capacitor should be repla-ced

Restart the unit If the fault is eliminated?

Disconnect the terminals for the reactor and measure the resistance between the two terminals of the reactor by an ohm gauge

Whether there is any damage or short-circuit?

Replace the reactor Restart the unit If the fault is eliminated?


End

Y

Y

N

Y

N

N

Y

N

N

Y

N

Y

N

Y

Y

Start

Did the equipment operate normally before the failure

occurs?

The AP1 voltage detection circuit is at fault

Check wiring inside of the indoor and outdoor

units

Are wires broken?

Check the communication circuit of the outdoor unitIf the fault is eliminated?

The communication circuit is abnormal

Replace the main board of the indoor unit

End


Replace the main board AP1 of the outdoor unit


Is the connection right?

Check the wiring of the indoor and outdoor units with reference to the

wiring diagram

Correctly connect the corresponding wires for the indoor and outdoor units with reference to

the wiring diagram

Y

Y

Y

Y

Y

N

N

N

N

Start

Measure voltage at the Test 10 position as

shown in the diagram with a voltmeter

Value jumping



Value jumping



Value jumping



Value jumping

The communication circuit of the outdoor

unit is normal

EndFault with

outdoor unit

Documents

Service Manual (9K & 12K 115V)