LG ACQ052PK Svc Manual Download | Manualshive

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

Is the Trans output power

AC 115V?

Is the Trans output power

about AC 14V?

Is shorted the Trans. output?

Is output Voltage of IC01D

DC 12V?

Is output Voltage of IC02D

DC 5V?

Is the voltage No.18 of Micom

DC 5V?

Exchange Main P.W.B Ass'y.

Is the

connection between

Main and Display

all right?

Is the reset circuit all right?

(The No.14 of Micom

is 5V.)

• Check the Fuse.
• Check the wiring diagram.

• Check the Main
P.W.B pattern.

• Exchange the Trans.

•

Exchange D02D~D05D.

• Exchange IC01D.

• Exchange IC02D.

• Exchange IC01A.

• Connect connector
exactly.

• Check the P.W.B
pattern.

NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

NO

YES

ELECTRIC PARTS TROUBLESHOOTING GUIDE:

Possible Trouble 1

• The unit does not operate.

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Summary of Contents for ACQ052PK

Page 1: ...Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Internal Use Only http biz lgservice com MODEL LWJ0515PCW CG LWJ0514PCF LWJ0512PGG CW CG LWC071JGMK0 LWC051JGMK1 JPMK2 LWC061JPMK0 LWJ0611PCG ...

Page 2: ... 2 3 MOTOR 8 2 2 4 AIR GUIDE 8 2 3 ELECTRICAL PARTS 8 2 3 1 OVERLOAD PROTECTOR 8 2 3 2 COMPRESSOR 9 2 3 3 CAPACITOR 9 2 3 4 THERMISTOR 9 2 3 5 CONTROL PANEL 9 2 3 6 POWER CORD 10 2 4 REFRIGERANT CYCLE 10 2 4 1 CONDENSER 10 2 4 2 EVAPORATOR 10 2 4 3 CAPILLARY TUBE 11 3 INSTALLATION 13 3 1 SELECT THE BEST LOCATION 13 3 2 HOW TO INSTALL 13 3 3 ELECTRICAL DATA 16 4 TROUBLESHOOTING GUIDE 16 4 1 OUTSIDE...

Page 3: ... The refrigerant is charged at the factory Be sure to read the safety precautions prior to servicing the unit 1 1 FEATURES DESIGNED FOR COOLING ONLY POWERFUL AND INCREDIBLE COOLING TOP DOWN CHASSIS FOR THE SIMPLE INSTALLATION AND SERVICE WASHABLE ONE TOUCH FILTER COMPACT SIZE 1 2 SPECIFICATIONS NOTE Specifications are subject to minor change without notice for further improvement 3 Copyright 2007 ...

Page 4: ...0Hours 11Hours 12Hours Cancel MODE Everytime you push this button it will toggle between COOL FAN DRY or FAN COOL POWER To turn the unit ON push the button To turn the unit OFF push the button again This button takes priority over any other buttons When you first turn it on the unit is on the High cool mode and the temp at 72 F 22 C TEMPERATURE SETTING This button can automatically control the tem...

Page 5: ...set as follows High F2 Low F1 High F2 or High F3 Mid F2 Low F1 High F3 POWER To turn the Set ON push the button To turn the Set OFF push the button again This button takes priority over any other buttons When you first turn it on the Set is on the High cool mode and the temp at 72 F 22 C COOL FAN DRY or COOL FAN Everytime you push this button it will toggle between COOL FAN and DRY ON OFF TIMER ST...

Page 6: ...n 2 1 1 3 Remove 9 screws that secure the cabinet to the base pan and condenser See Figure 3 4 Lift the cabinet from the unit 5 Re install by referring to the procedures above 2 1 3 CONTROL BOARD 1 Disconnect the unit from the power source 2 Remove the front grille Refer to Section 2 1 1 3 Remove the cabinet Refer to Section 2 1 2 4 Remove 2 screws that secure the control board to base pan and air...

Page 7: ...the power source 2 Remove the front grille Refer to Section 2 1 1 3 Remove the cabinet Refer to Section 2 1 2 4 Remove the control board Refer to Section 2 1 3 5 Remove the air guide upper Refer to Section 2 2 1 6 Remove 2 screws that secure the base pan to condenser See Figure 7 7 Remove 2 screws that secures the shroud to channel of condenser 8 Press the snap area of shroud with your thumbs This...

Page 8: ...er to Section 2 1 1 3 Remove the cabinet Refer to Section 2 1 2 4 Remove the control board Refer to Section 2 1 3 5 Remove the air guide upper Refer to Section 2 2 1 6 Remove the compressor turbo fan fan and shroud Refer to Section 2 2 2 7 Remove the motor Refer to Section 2 2 3 8 Remove 2 screws that secure the air guide to the base pan See Figure 11 9 Push the air guide backward and lift it upwa...

Page 9: ... Section 2 1 3 3 Discharge the capacitor by placing a 20 KΩ resistor across the capacitor terminals 4 Pull the capacitor upward 5 Remove all the leads of capacitor terminals 6 Re install the components by referring to the removal procedure above See Figure 15 2 3 4 THERMISTOR 1 Remove the cabinet Refer to Section 2 1 2 2 Remove the control board Refer to Section 2 1 3 3 Disconnect the thermistor t...

Page 10: ... REFRIGERANT CYCLE 2 4 1 CONDENSER 1 Remove the cabinet Refer to Section 2 1 2 2 Discharge the refrigerant by using a refrigerant recovery system 3 Remove 2 screws which fasten the condenser See Figure 19 4 After discharging the refrigerant completely unbraze the interconnecting tube at the condenser connections 5 Remove the condenser 6 Re install by referring to the procedures above 2 4 2 EVAPORA...

Page 11: ...ves A and B and observe vacuum gauge for a few minutes A rise in pressure would indicate a possible leak or moisture remaining in the system With valves A and B closed stop the vacuum pump 6 4 Remove the hose from the vacuum pump and place it on the charging cylinder See figure 20B Open valve C Discharge the line at the manifold connection 6 5 The system is now ready for final charging 7 Recharge ...

Page 12: ...razing equipment pinch off tool capable of making a vapor proof seal leak detector tubing cutter hand tools to remove components and service valve B A B A B A COMPOUND GAUGE SEE INSETS BELOW CAPILLARY TUBE EVAPORATOR LOW PRESSURE SIDE COMPRESSOR CONDENSER HIGH PRESSURE SIDE EXTERNAL VACUUM PUMP LO HI CHARGING CYLINDER MANIFOLD GAUGE C Figure 20A Pulling Vacuum Figure 20B Charging ...

Page 13: ...to 36 The upper and lower sash must open sufficiently to allow a clear vertical opening of 13 from the bot tom of the sash to the window stool 2 If storm window presents interference fasten a 2 wide wood strip to the inner window sill across the full width of the sill The wood strip should be thick enough to raise the height of the window sill so that the unit can be installed without interference...

Page 14: ...rews TYPE A provided b The bracket helps to hold unit securely in place Be sure to place bracket edge flush against back of inner sill See Figure 27 3 INSTALL THE AIR CONDITIONER IN THE WINDOW a Carefully lift the air conditioner and slide it into the open window Make sure the bottom guide of the air conditioner drops into the notches of the L bracket See Figure 27 HARDWARE TYPE E 1EA SASH SEAL No...

Page 15: ...ase pan in the right side b Fasten the suport bracket TYPE G using a removed screw Attach the suport bracket TYPE G in the inner window sill with a screw TYPE B as shown Figure 31 7 Window installation of room air conditioner is now completed See ELECTRICAL DATA for attaching power cord to electrical outlet 3 2 4 HOW TO SECURE THE DRAIN PIPE In humid weather excess water may cause the BASE PAN to ...

Page 16: ...e windows 3 3 ELECTRICAL DATA USE OF EXTENSION CORDS Because of potential safety hazards we strongly discourage the use of an extension cord However if you wish to use an extension cord use a CSA certified UL listed 3 wire grounding extension cord rated 15A 125V Do not under any circumstances cut or remove the grounding prong from the plug Line Cord Plug Use Wall Receptacle Power Supply Power supp...

Page 17: ...refrigerant in the cooling cycle COOLED AIR HOT DISCHARGED AIR MOTOR COMPRESSOR ROOM AIR HEAT LOAD CAPILLARY TUBE LIQUID REFRIGERANT LIQUID OUTLET VAPOR INLET COMPLETE LIQUID BOIL OFF POINT SUCTION LINE COOL LOW PRESSURE VAPOR LIQUID PRESSURE DROP DISCHARGE LINE NOT HIGH PRESSURE VAPOR OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH EVAPORATOR COILS CONDENSER COILS ROOM AIR CONDITIONER CYCLE OF R...

Page 18: ...e Cooling Satisfactory operation with temperature difference of inlet outlet air 44 50 F 7 10 C Replacement of unit if the unit is beyond repair Check outdoor coil heat exchanger and fan operation Check heat load increase Check cold air circulation for smooth flow Check gas leakage Clean condenser Not on separate circuit Check inside gas pressure Adjust refrigerant charge Malfunction of compressor...

Page 19: ... Check of control panel setting Compressor fails only to start Defect of compressor capacitor Replacement of compressor Motor damaged Irregular motor insulation Ω Irregular motor resistance Ω Check of circuit breaker and fuse Check control panel Fan only fails to start Improper wiring Defect of fan motor capacitor Replacement of fan motor Regular but fails to start Replacement of compressor Lockin...

Page 20: ...age No 18 of Micom DC 5V Exchange Main P W B Ass y Is the connection between Main and Display all right Is the reset circuit all right The No 14 of Micom is 5V Check the Fuse Check the wiring diagram Check the Main P W B pattern Exchange the Trans Exchange D02D D05D Exchange IC01D Exchange IC02D Exchange IC01A Connect connector exactly Check the P W B pattern NO NO NO NO NO NO NO YES YES YES YES Y...

Page 21: ... Is the voltage N0 7 of IC01M DC 5V Check the RY COMP Check the wiring Diagram NO NO NO NO YES YES YES YES Possible Trouble 2 The compressor does not operate Is the wire connection of RY COMP all right Check the RY COMP Connect LEAD Wire to RY COMP again NO YES Possible Trouble 3 The compressor always operate Exchange IC01M Exchange IC01M Is the voltage NO 1 or 4 of IC01M DC 5V Is the voltage NO 1...

Page 22: ...hange the battery Check the P W B pattern Connect connector to CN DISP1 exactly NO NO NO YES YES YES Possible Trouble 5 Romote controller does not operate NO NO NO NO YES YES YES Is the IC01G all right Is the connection of CN DISP1 all right Exchange the display P W B Ass y Exchange IC01G Exchange Q01G Q02G Q03G Q04G Connect connector to CN DISP1 exactly Does the Q01G Q02G Q03G Q04G operate normal...

Page 23: ...l identification Repair or replace loose terminal Capacitor Discharge Test capacitor capacitor before testing Replace if not within 10 of manufacturer s rating Replace if shorted open or damaged Will not rotate Fan blade hitting shroud or blower wheel hitting scroll Re align assembly Units using slinger ring condenser fans must have 0 22 0 25 inch clearance to the base If necessary shim up the bot...

Page 24: ...Check the wire connections If not according to the wiring diagram correct the connections Thermistor Check the TEMP control If not at the lowest number set TEMP control to this setting and restart the unit Check the continuity of the thermistor Replace the thermistor if the circuit is open Capacitor discharge Check the capacitor capacitor before Replace if not within 10 of manufacturer s servicing...

Page 25: ...ge damaged area on the coil surface head pressures will increase causing the compressor to cycle Straighten the fins or replace the coil Capacitor Test the capacitor Wiring Check the terminals If loose repair or replace Refrigeration system Check the system for a restriction Insufficient cooling Air filter If restricted clean or replace Unit undersized Determine if the unit is properly sized for t...

Page 26: ...vice purposes LGE Internal Use Only 5 SCHEMATIC DIAGRAM 5 1 CIRCUIT DIAGRAM Q TY PER SET 1 1 1 1 1 1 1 1 LOCATION NO 1 2 3 4 5 6 7 8 DESCRIPTION POWER CORD ASSEMBLY FAN MOTOR COMPRESSOR DISPLAY P W B ASSEMBLY MAIN P W B ASSEMBLY THERMISTOR CAPACITOR OWERLOAD PROTECTOR 1 6 4 5 8 3 7 2 ...

Page 27: ... LED out3 Receiver 30 Buzzer 33 32 31 HI MED ION 29 28 27 SLIDE SW 40 KEY0 37 38 39 VDD SEG g 41 42 43 SEG f SEG e 44 SEG d TMP87CH47U MICOM 4 SEG b SEG a SEG c 3 2 1 7 6 5 Room TH Option2 Option1 Pipe TH 23 26 25 24 SYNC LOW 4WAY COMP 20 21 22 Reset Osc out Osc in 16 VAref VSS 18 19 17 13 14 15 TEST 11 SCL SDA 10 9 8 Tx 12 Rx 5V A1 3 4 GND SDA SCL A2 A0 1 2 EEPROM CAT93C46 SMW250 02 1 1 2 2 CN TH...

Page 28: ...8 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 3 COMPONENTS LOCATION FOR MAIN P W B ASM 5 4 COMPONENTS LOCATION FOR DISPLAY P W B ASM ...

Page 29: ...Use Only 6 EXPLODED VIEW Models LWJ0515PCW CG LWJ0514PCF LWJ0512PGG CW CG LWC051JGMK1 JPMK2 LWJ0611PCG 352390A 267110 152302 130410 359012 135312 354210 349480 352390B 559010 346811 554030 130910 264110 W0CZZ 249950 268711B 567480 550140 554160 567502 352115 552111 552102 35211A 268711A 147582B 145200 147582A ...

Page 30: ...rvice purposes LGE Internal Use Only Models LWC071JGMK0 LWC061JPMK0 352390A 267110 152302 130410 359012 135312 354210 349480 352390B 559010 346811 554030 130910 264110 W0CZZ 249950 268711B 567480 550140 554160 567502 352115 552111 352113 552102 35211A 268711A 147582B 145200 147582A ...

Page 31: ...P NO 3828A20038L FEBRUARY 2008 ...

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