LG ACQ052PK, Service Manual

Page 1: ...00ER WM 5031 LW5200ER LW050CE WG5200ER LWJ0515PAG WG6000R LW5200R KG6000R M5404R WG5200R M6004R HBLG6000R HBLG5200E ACQ052PK CAUTION website http www lgservice com BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE PERSONNEL ...

Page 2: ...CTOR 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 DIMENSIONS 16 4 2 PIPING SYSTEM 17 4 3 TROUBLESHOOTING GUIDE 18 5 SCHEMAT...

Page 3: ...tured and assembled under a strict quality control system 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...

Page 4: ...s 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 temperature of the room The temperature can be set within a ...

Page 5: ...ow 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 STOPPING OPERATION Everytime you push this button when the ...

Page 6: ...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 guide See Figure 4 5 Pull the control board toward yours...

Page 7: ...on 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 allows you to remove it from the condenser 9 Lift the co...

Page 8: ... 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 upward See Figure 11 10 Re install by referring to the proced...

Page 9: ...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 terminals from main P W B assembly 4 Remove the thermistor...

Page 10: ...efer 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 EVAPORATOR 1 Remove the cabinet Refer to Section 2 1 2 2 Dischar...

Page 11: ...30 min utes until 600 micron vacuum is obtained Close valves 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...

Page 12: ... 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: ...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 by the storm window frame See Figure 23 Top of wood stri...

Page 14: ...urely 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 Not adhesive backed TYPE D 1EA SEAL STRIP Adhesive backed T...

Page 15: ...re 30 6 a Remove the screws that secure the cabinet and base 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...

Page 16: ...use 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 supply cord with 3 prong grounding plug Standard 125V 3 wire ...

Page 17: ...D 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 REFRIGERATION HIGH PRESSURE VAPOR LIQUID REFRIGERANT LOW P...

Page 18: ...nce 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 Replacement of compressor Check clogging in refrigera ti...

Page 19: ...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 Locking of piston metal Irregular motor resistance Ω Irregular ...

Page 20: ... 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 Po...

Page 21: ...ck 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 13 or 16 of IC01M 0V Check the RY Hi or RY Lo Check the wi...

Page 22: ...or 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 normally on main P W B Ass y Possible Trouble 6 It displays abn...

Page 23: ...or 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 bottom of the fan motor with mounting screw s Check fan moto...

Page 24: ... 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 rating replace if shorted open or damaged Compressor Che...

Page 25: ...ncrease 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 the area to be cooled Excessive noise Blower or fan Check ...

Page 26: ... 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: ... 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 TH1 5V R01B R02H R01H 1 6 2K 1 12 1K RT8 00MG 1M OSC01B 50V...

Page 28: ... 28 5 3 COMPONENTS LOCATION FOR MAIN P W B ASM 5 4 COMPONENTS LOCATION FOR DISPLAY P W B ASM ...

Page 29: ... 267110 152302 130410 359012 W48602 135312 354210 349480 352390 2 149980 559010 346811 554030 W48602 130910 264110 238310 W0CZZ 249950 268714 263230 550140 554160 567502 352115 552111 552102 352113 35211A 268712 159900 2 145200 159900 1 148000 ...

Page 30: ...AY 6871A20193B 6871A20193B 6871A20193B 6871A20193B 6871A20193B 6871A20193B R 268714 PWB PCB ASSEMBLY MAIN 6871A20188L 6871A20188L 6871A20188L 6871A20188L 6871A20188Q 6871A20188L R 346811 MOTOR ASSEMBLY SINGLE 4681A10012B 4681A10012B 4681A10002N 4681A10002N 4681A10012L 4681A10002P R 349480 ORIFICE 4948A10007A 4948A10007A 4948A10007A 4948A10007A 4948A10007A 4948A10007A R 352113 TUBE DISCHARGE 5210A2...

Page 31: ...71A20188L 6871A20188Q 6871A20188L R 346811 MOTOR ASSEMBLY SINGLE 4681A10012G 4681A10002H 4681A10012B 4681A10012G 4681A10002P 4681A10012B 4681A10002K R 349480 ORIFICE 4948A10007A 4948A10007A 4948A10007A 4948A10007A 4948A10007A 4948A10007A 4948A10007A R 352113 TUBE DISCHARGE 5210A20252A 5210A21100A 5210A21100A 5210A20252A 5210A21100B 5210A21100A 5211A10129A R 352115 TUBE ASSEMBLY EVAPORATOR IN 5211A...

Page 32: ...DISPLAY 6871A20193B 6871A20193B R 268714 PWB PCB ASSEMBLY MAIN AC 6871A20188L 6871A20188L R 346811 MOTOR ASSEMBLY SINGLE 4681A10012B 4681A10012L R 349480 ORIFICE 4948A10007A 4948A10007A R 352113 TUBE DISCHARGE 5210A21100A 5210A21100A R 352115 TUBE ASSEMBLY EVAPORATOR IN 5211A10063A 5211A10063A R 35211A TUBE ASSEMBLY SUCTION SINGLE 5211A10062A 5211A10062A R 352390 1 AIR GUIDE ASSEMBLY 5239A30003A 5...

Page 33: ...6711A20034E R 268712 PWB PCB ASSEMBLY DISPLAY 6871A20193B R 268714 PWB PCB ASSEMBLY MAIN 6871A20188Q R 346811 MOTOR ASSEMBLY SINGLE 4681A10002L R 349480 ORIFICE 4948A10007A R 35211A TUBE ASSEMBLY SUCTION SINGLE 5211A10062A R 352113 TUBE DISCHARGE 5211A10129A R 352115 TUBE ASSEMBLY EVAPORATOR IN 5211A10063A R 352390 1 AIR GUIDE ASSEMBLY 5239A30003A R 352390 2 AIR GUIDE ASSEMBLY 5239A10005A R 352410...

Page 34: ...P No 3828A20038L January 2005 Printed in Korea ...