LG LWH182MFAB1 Manual Download Page 1

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Room Air Conditioner

SVC MANUAL(Exploded View)

CAUTION

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 : LWM1560BHE
LWM1861BHE/BHG/QBG
LWN1862BHG/QHG/BBG/VBS/QBG
LWN2262BHG/CHG/CHE/QHG/RHG/BBG/QBG
LWN2262BHN/CHM/RBG/2262CHF
LWH182MFAB1/LWH182MGMM0
LWH226NGMM0

Summary of Contents for LWH182MFAB1

Page 1: ... the safety precautions in General SVC manual Only for authorized service personnel Internal Use Only http biz lgservice com MODEL LWM1560BHE LWM1861BHE BHG QBG LWN1862BHG QHG BBG VBS QBG LWN2262BHG CHG CHE QHG RHG BBG QBG LWN2262BHN CHM RBG 2262CHF LWH182MFAB1 LWH182MGMM0 LWH226NGMM0 ...

Page 2: ...C B ASM 33 4 5 COMPONENTS LOCATION FOR DISPLAY P C B ASM 34 5 EXPLODED VIEW 35 1 PREFACE This SERVICE MANUAL provides various service information including the mechanical and electrical parts etc This room air conditioner was manufactured 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 ...

Page 3: ... 460 2 740 2 020 7 6 7 9 12 0 12 8 9 5 9 3 9 3 7 1 7 3 8 9 13 600 14 300 17 500 19 000 18 000 1 310 1 330 2 300 2 210 2 020 5 7 5 8 7 6 12 5 9 5 10 4 10 7 11 0 8 6 8 9 27 DB 19 WB 35 DB 24 WB 20 DB 15 WB 7 DB 6 WB 870g 30 7 Oz 960g 33 9 Oz 970g 34 3 Oz 1 080g 38 2 Oz 770g 27 1Oz 2ROW 15STACKS 3ROW 15STACKS 2ROW 15STACKS 3ROW 15STACKS 2ROW 15STACKS 2ROW 16STACKS L BENDED TYPE BLOWER PROPELLER TYPE ...

Page 4: ...DRAIN SYSTEM NET WEIGHT lbs kg OUTSIDE DIMENSION inch W x H x D mm 1Ø 220V 240V 50Hz 20 000 19 800 24 000 2 740 2 630 2 740 12 8 15 7 12 8 7 3 7 5 8 8 19 000 19 100 24 000 2 210 2 280 2 120 12 5 11 1 12 5 8 6 8 3 10 8 27 DB 19 WB 35 DB 24 WB 20 DB 15 WB 7 DB 6 WB 1 080g 38 2 Oz 3ROW 15STACKS 2ROW 16STACKS L BENDED TYPE BLOWER PROPELLER TYPE FAN WITH SLINGER RING 1 2 2 2 2 2 6 POLES WIRELESS REMOCO...

Page 5: ...D mm 1Ø 220V 240V 50Hz 17 500 18 000 20 000 24 000 18 000 2 460 2 740 2 020 12 0 12 8 9 5 7 1 7 3 8 9 17 500 18 000 19 000 24 000 18 000 2 300 2 210 2 020 7 6 12 5 9 5 11 0 8 6 8 9 27 DB 19 WB 35 DB 24 WB 20 DB 15 WB 7 DB 6 WB 970g 34 3 Oz 1 080g 38 2 Oz 770g 27 1Oz 2ROW 15STACKS 3ROW 15STACKS 2ROW 15STACKS 2ROW 16STACKS L BENDED TYPE BLOWER PROPELLER TYPE FAN WITH SLINGER RING 1 2 2 6 POLES WIREL...

Page 6: ...s This should not be regarded as trouble After defrosting the heating operation begins again THERMOSTAT Turn the thermostat control to the desired setting The central position is a normal setting for average conditions You can change this setting if necessary in accordance with your temperature preference The thermostat automatically controls cooling or heating but the fan runs continuously whenev...

Page 7: ...SPEED SELECTOR Select the fan speed in two steps Low or High ROOM TEMPERATURE SETTING BUTTON Control the room temperature within a range of 16 C to 30 C AUTO RESTART SWITCH In failure of electric power if the switch is set to ON the unit runs as previous setting operation when power returns AUTO SWING BUTTON Control the horizontal air direcion by air swing system SIGNAL RECEIVER 6 6 7 7 8 8 Precau...

Page 8: ...binet at back See figure 2 3 Pull the base pan forward 2 1 3 CONTROL BOX 1 Remove the front grille Refer to section 2 1 1 2 Pull the base pan forward so that you can remove the 2 screws which fasten the cover control at the right side See figure 3 3 Remove the 3 screws which fasten the control box See figure 3 4 Discharge the capacitor by placing a 20 000 ohm resistor across the capacitor terminal...

Page 9: ...tor at the left side and the top side 3 Move the evaporator sideward carefully 4 Remove the orifice from the air guide carefully 5 Remove the clamp which secures the blower with plier See figure 5 6 Remove the blower with plier or your hand without touching blades See figure 6 7 Re install the components by referring to the removal procedure above 2 2 3 FAN 1 Remove the cabinet Refer to section 2 ...

Page 10: ...e the 4 screws which fasten the motor See figure 9 6 Remove the motor 7 Re install the components by referring to the removal procedure above 2 3 2 COMPRESSOR 1 Remove the cabinet Refer to section 2 1 2 2 Discharge the refrigerant system using FreonTM Recovery System If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the FreonTM Leave the valve in pla...

Page 11: ...Unfold the control box Refer to section 2 3 3 3 Disconnect the grounding screw from the control box 4 Disconnect 2 receptacles 5 Remove a screw which fastens the clip cord 6 Pull the power cord See figure 12 7 Re install the component by referring to the removal procedure above Use only one ground marked hole for ground connection 8 If the supply cord of this appliance is damaged it must be replac...

Page 12: ...emove the cabinet Refer to section 2 1 2 2 Remove the reversing coil from the reversing valve assembly by loosening the screw 3 Discharge the refrigerant system using a FreonTM recovery system If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the FreonTM Leave the valve in place after servicing 4 After discharging the refrigerant completely unbraze t...

Page 13: ...efrigerant completely 4 Remove the 3 screws which fasten the evaporator at the left side and the top side 5 Move the evaporator sideward carefully and then unbraze the interconnecting tube at the evaporator connectors 6 Remove the evaporator 7 Re install the components by referring to notes See figure 18 2 4 3 CAPILLARY TUBE 1 Remove the cabinet Refer to section 2 1 2 2 Remove the brace Refer to s...

Page 14: ...r See figure 19B Open valve C Discharge the line at the manifold connection 5 The system is now ready for final charging 6 Recharge as follows 1 Refrigeration cycle systems are charged from the High side If the total charge cannot be put in the High side the balance will be put in the suction line through the access valve which you installed as the system was opened 2 Connect the charging cylinder...

Page 15: ...zing equipment Pinch off tool capable of making a vapor proof seal Leak detector Tubing cutter Hand Tools to remove components Service valve A B COMPOUND GAUGE EVAPORATOR LOW PRESSURE SIDE SEE INSETS BELOW CONDENSER HIGH PRESSURE SIDE MANIFOLD GAUGE COMPRESSOR CAPILLARY TUBE Figure 19A Pulling Vacuum Figure 19B Charging A B EXTERNAL VACUUM PUMP A CHARGING CYLINDER LOW HI B C COOLING ...

Page 16: ...heir functions in the refrigeration system Refer to figure 20 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle MOTOR COMPRESSOR OIL LIQUID REFRIGERANT CAPILLARY TUBE OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH SUCTION LIME COOL LOW PRESSURE VAPOR COOLED AIR COMPLETE LIQUID BOIL OFF POINT LIQUID PRESSURE DROP ROOM AIR HEAT LOAD VAPOR INLET HOT DISCHARGED A...

Page 17: ... heat exchanger the fan operation Check gas leakage Repair gas leak Replacement of unit if the unit is beyond repair Satisfactory operation with temperature difference of inlet outlet air COOLING 7 10 C HEATING 15 17 C Check heat load increase in cooling operation Unexpected residue Added heat load Check of inside gas pressure Adjusting of refrigerant charge Malfunction of compressor Replacement o...

Page 18: ...capacitor Irregular motor resistance Irregular motor insulation Replacement of fan motor Regular but fails to start Replacement of compressor locking of rotor metal Improper thermostat setting Loose terminal connection Improper wiring Irregular motor resistance Irregular motor insulation Replacement of compressor Motor damaged Drop of power voltage Check capacitor Replacement Only compressor fails...

Page 19: ...bout 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 20 of Micom DC 5V Exchange Main PCB Ass y Is the connection between Main and Display all right Is the reset circuit all right The No 16 of Micom is 5V Check the Fuse Check the wiring diagram Check the Main PCB pattern Exchange the Trans Exchange D02D D05D Exchange IC01D Exch...

Page 20: ...ect the setting Temp to lower Number Wait 3 Minutes Is the Unit for 3 minutes delay Exchange MAIN PCB Ass y Is the voltage N0 7 of IC01M DC 5V Check the RY COMP Check the wiring Diagram NO NO NO YES YES YES YES Is the wire connection of RY COMP all right Check the RY COMP Connect LEAD Wire to RY COMP again NO YES NO Possible Trouble 2 The compressor does not operate Possible Trouble 3 The compress...

Page 21: ...M DC 5V Is the voltage NO 14 or 15 of IC01M 0V Check the RY Hi or RY Lo Check the wiring diagram NO NO YES YES Exchange Micom Exchange IC01M Check the PCB pattern Is the voltage NO 6 of IC01M DC 5V Is the voltage NO 11 of IC01M 0V Check the RY SYNC Check the connectionn of CN SYNC NO NO YES YES Possible Trouble 4 FAN does not operate Possible Trouble 5 Auto Swing does not operate ...

Page 22: ...ector to CN DISP2 exactly Does the Q12G Q13G Q14G operate normally on main PCB Ass y Check the PCB pattern Is the voltage of Battery about over 2 3V Exchange Receiver Ass y Is the connection of CN DISP2 all right Is the voltage No 10 of CN DISP2 on Main PCB Ass y DC 5V Exchange the battery Check the PCB pattern Connect connector to CN DISP2 exactly NO NO NO YES YES YES Possible Trouble 6 Remote co...

Page 23: ...rnal Use Only NO NO YES YES Is the Knob of SW1 set to left position Is the voltage No 1 of CN DISP1 of Main PCB Ass y DC 5V Reference to OWNER S MANUAL Set the Knob of SW1 to left position Check the SW1 Check the pattern of Main Display PCB Possible Trouble 8 The function of Auto Restart does not operate ...

Page 24: ...m of the fan motor with mounting screw s Check fan motor bearings if motor shaft will not rotate replace the motor Check voltage See limits on this page If not within limits call an electrician Test capacitor Check bearings Does the fan blade rotate freely If not replace fan motor Pay attention to any change from high speed to low speed If the speed does not change replace the motor Check grommets...

Page 25: ...f open or grounded replace the compressor Check the compressor overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool it and retest Check the voltage See the limits on the preced ing page If not within limits call an electrician Check overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool ...

Page 26: ...n to warmest position Check the position of knob If not at the warmest setting advance knob to this setting Check conti nuity of the thermostat Check continuity of control by removing lead from terminal turn the selector switch to heat and check between com mon terminal and H terminal NOTE Room tem perature should be 30 C 86 F or lower when test ing the temperature control If no continuity exists ...

Page 27: ...SING COIL BK RD 3854A20268E WIRING DIAGRAM BK RD BK BK BK BR T B2 T B1 T B3 T B4 L2 L3 L1 SUMP HEATER THERMOSTAT BK RD RD RD RD RD RD BL BL BL BL BK BK BL DEICER PWB ASSY BR RD RD CAPACITOR COMP YL OR BR OR BR MOTOR SYNC M YL YL YL YL R P T C S C ROCKER SWITCH F C C H H L ROTARY SWITCH Plain Ribbed WH BL THERMISTOR GN YL POWER INPUT POWER CORD ASSY ROTARY SWITCH FAN MOTOR ASSY SH CAPACITOR LAMP AS...

Page 28: ...4 2 5 3 1 OR BR OR BR CAPA CITOR START CAPACITOR RY COMP RY COMP RY S CAPA CN POWER CN POWER SOFT STARTER PWB ASSY ROCKER SWITCH P T C YL YL YL RD THERMISTOR BL BK LAMP BK BK BR DEICER PWB ASSY RD BK BL L2 L3 L1 WH BL POWER INPUT GN YL Plain Ribbed MOTOR COMP SYNC M 2 3 3 4 1 3 4 1 3 8 5 9 2 12 4 6 13 7 8 8 10 11 POWER CORD ASSY ROTARY SWITCH FAN MOTOR ASSY SH CAPACITOR LAMP ASSY THERMOSTAT COMPRE...

Page 29: ... 3 RY LO GN YL GN WH BL Ribbed YL BR BR SYNC MOTOR CN SYNC RY SYNC GN YL GN FUSE 250V T2A 115V T2A OLP 2 3 4 10 12 1 8 6 7 5 13 12 11 9 RY SYNC WIRING DIAGRAM 3854A20003K CN TRANS 1 BK BK BL RD T B 2 T B 1 BK BK RD BK RD REVERSING COIL CN 4WAY RY 4WAY BK BK BK RD RD SUMP HEATER RD BL CN DISP 1 CN SYNC CN TH1 CN DISP 2 RY LO RY HIGH BR BR CN TRANS 2 FUSE 250V T2A ZNR01J MAIN P W B ASSY DISPLAY P W ...

Page 30: ...DISP2 DISPLAY P W B ASSY RY COMP RY COMP RY S CAPA CN POWER ZNR01J MAIN P W B ASSY SOFT STARTER PWB ASSY FUSE 250V T2A RY 4WAY CN 4WAY BK RD BK RD BK T B 1 T B 2 BK SUMP HEATER BK BK RD RD RD RD REVERSING COIL 4 3 RY LO GN GN YL WH BL Ribbed YL BR BR SYNC MOTOR CN SYNC RY SYNC POWER CORD ASSY FAN MOTOR ASSY SH CAPACITOR COMPRESSOR MAIN PWB ASSY DISPLAY PWB ASSY TRANSFORMER ASSY THERMISTOR ASSY CON...

Page 31: ...l right reserved Only for training and service purposes LGE Internal Use Only 4 2 DEICER P C B ASSY 6871A20083A A 1 CN TH PWB 6870A90031A D02D RY1 JQ1C OSC01B CN POWER R02D R01D ZNR 1 3 5 IC01A C04D C02D J01 C01D C02A PWB ASSY 6871A20083 D01D ...

Page 32: ...ght 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 3 ELECTRONIC CONTROL DEVICE MODEL LWN1862QBG QHG LWN2262QBG QHG RHG LWM1861QBG LWH182MGMM0 LWH226NGMM0 ...

Page 33: ...N FOR MAIN P C B ASSY MODEL LWN1862QBG QHG LWN2262QBG QHG RHG RHG LWM1861QBG MODEL LWH182MFAB1 LWH226NGMM0 33 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 34: ...ectronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 5 COMPONENTS LOCATION FOR DISPLAY P C B ASSY MODEL LWN1862QBG QHG LWN2262QBG QHG RHG RHG LWM1861QBG MODEL LWH182MGMM0 LWH226NGMM0 ...

Page 35: ...nal Use Only 5 EXPLODED VIEW MECHANICAL LWN2262BHG BBG 559011 135313 147581B 147581A 266002 135510 552102 352116 552112 561410 552202 552116 152302 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 W0CZZ 146812 266003 264110 149410 137215 263230 269300 249950 553000 349001 ...

Page 36: ... LGE Internal Use Only MECHANICAL LWN1862BHG 559011 135313 147581B 147581A 266002 135510 552102 352111 552112 561410 552202 552116 152302 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 W0CZZ 146812 266003 264110 149410 137215 263230 269300 249950 553000 349001 ...

Page 37: ...oses LGE Internal Use Only MECHANICAL LWN2262CHF 559011 135313 147581 266002 135510 552102 352116 552112 561410 552202 552116 152302 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 W0CZZ 146812 266003 264110 149410 137215 263230 269300 249950 553000 349001 ...

Page 38: ...E Internal Use Only MECHANICAL LWM1861BHF 559011 135313 147581 266002 135510 552102 352116 352111 552112 561410 552202 552116 567502 152302 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 W0CZZ 146812 266003 264110 149410 137215 263230 269300 249950 349001 35211A ...

Page 39: ... Internal Use Only MECHANICAL LWM1861BHE 559011 135313 147581B 147581A 266002 135510 552102 352116 352111 552112 561410 552202 552116 567502 152302 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 W0CZZ 146812 266003 264110 149410 137215 263230 269300 249950 349001 ...

Page 40: ...oses LGE Internal Use Only MECHANICAL LWH182MFAB1 559011 135313 147581 266002 135510 552102 352116 352111 552112 561410 552202 552116 152302 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 W0CZZ 146812 266003 264110 149410 137215 263230 269300 249950 349001 ...

Page 41: ...nal Use Only ELECTRONICAL LWN2262QHG QBG LWH226NGMM0 559011 135313 249950 147581B 147581A 237200 135510 552102 352116 552112 561410 552202 552116 267110 159830 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 W0CZZ 146812 263230 268711B 238310 268711A 264110 553000 349001 ...

Page 42: ...GE Internal Use Only ELECTRONICAL LWN1862QHG 559011 135313 249950 147581B 147581A 237200 135510 552102 352111 552112 561410 552202 552116 267110 152302 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 W0CZZ 146812 263230 268711B 238310 268711A 264110 553000 349001 ...

Page 43: ...nternal Use Only ELECTRONICAL LWM1861QBG 559011 135313 249950 147581B 147581A 237200 135510 552102 352116 352111 552112 561410 552202 552116 267110 567502 152302 135312 354210 349480 130910 352390 554031 346811 349600 147582 130410 554160 550140 W0CZZ 146812 263230 268711B 238310 268711A 264110 349001 ...

Page 44: ...nternal Use Only ELECTRONICAL LWH182MGMM0 559011 135313 249950 147581B 147581A 237200 135510 552102 352116 352111 552112 561410 552202 552116 267110 152302 135312 354210 349480 359012 130910 352390 554031 346811 349600 147582 130410 554160 550140 W0CZZ 146812 263230 268711B 238310 268711A 264110 349001 ...

Page 45: ...P NO 3828A30047V NOVEMBER 2008 ...

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