LG LWHD8008R Service Manual Download Page 1

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Room

Air Conditioner

SERVICE MANUAL

MODELS:

LWHD8008R

CAUTION

website http://www.lgappliances.com

• BEFORE SERVICING THE UNIT, READ THE SAFETY

PRECAUTIONS IN THIS MANUAL.

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

Summary of Contents for LWHD8008R

Page 1: ...Room Air Conditioner SERVICE MANUAL LG MODELS LWHD8008R CAUTION website http www lgappliances com BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE PERSONNEL ...

Page 2: ...D FAN 6 2 2 3 MOTOR 7 2 2 4 AIR GUIDE 7 2 3 ELECTRICAL PARTS 7 2 3 1 OVERLOAD PROTECTOR 7 2 3 2 COMPRESSOR 8 2 3 3 CAPACITOR 8 2 3 4 THERMOSTAT 8 2 3 5 ROTARY SWITCH 8 2 3 6 POWER CORD 9 2 4 REFRIGERANT CYCLE 9 2 4 1 CONDENSER 9 2 4 2 EVAPORATOR 10 2 4 3 CAPILLARY TUBE 10 3 INSTALLATION 12 3 1 SELECT THE BEST LOCATION 12 3 2 HOW TO INSTALL 12 3 3 ELECTRICAL DATA 15 4 TROUBLESHOOTING GUIDE 15 4 1 O...

Page 3: ...IMPLE INSTALLATION AND SERVICE BUILT IN ADJUSTABLE THERMOSTAT WASHABLE ONE TOUCH FILTER COMPACT SIZE 1 2 SPECIFICATIONS MODELS ITEMS COOLING CAPACITY BTU h 5 800 POWER SUPPLY Phase V Hz 1ø 115V 60HZ INPUT W 600 OPERATING CURRENT AMP 5 6 REFRIGERANT CONTROL CAPILLARY TUBE REFRIGERANT CHARGE R 22 269g 9 5 oz INSIDE FAN TURBO FAN OUTSIDE FAN PROPELLER FAN WITH SLINGER RING AIR DISCHARGE 2 WAY RIGHT A...

Page 4: ...IMPLE INSTALLATION AND SERVICE BUILT IN ADJUSTABLE THERMOSTAT WASHABLE ONE TOUCH FILTER COMPACT SIZE 1 2 SPECIFICATIONS MODELS ITEMS COOLING CAPACITY BTU h 5 100 POWER SUPPLY Phase V Hz 1ø 115V 60HZ INPUT W 475 OPERATING CURRENT AMP 4 4 REFRIGERANT CONTROL CAPILLARY TUBE REFRIGERANT CHARGE R 22 280g 9 9 oz INSIDE FAN TURBO FAN OUTSIDE FAN PROPELLER FAN WITH SLINGER RING AIR DISCHARGE 2 WAY RIGHT A...

Page 5: ...mpered lead and each exposed metallic part on the equipment at all position except Off of the ROTARY SWITCH 4 The value should be over 1 MΩ CAUTION After switching the air conditioner from Cool to Off or Fan wait at least 3 minutes before switching it back to Cool Operation High Fan Low Fan High Cool Off Low Cool Thermostat 1 2 3 4 5 6 7 8 9 Off Turns air conditioner off High Fan High speed fan op...

Page 6: ...e 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 guide See Figure 4 5 Pull the contr...

Page 7: ...ection 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 screw 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 compressor upward with the evaporator and con...

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: ...screw which fastens the capacitor clamp 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 THERMOSTAT 1 Remove the cabinet Refer to Section 2 1 2 2 Remove the control board Refer to Section 2 1 3 3 Remove 2 screws which fasten the thermostat 4 Remove all the leads of the thermostat terminals 5 Remove the thermos...

Page 10: ...curing the clip with cord to the control board 8 Pull the power cord 9 Re install by referring to procedures above 2 4 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 the air guide Refer to Section 2 2 1 4 Remove 2 screws which fasten the condenser 5 After discharging the refrigerant completel...

Page 11: ...en slowly with the two full turns counterclock wise This will keep oil from foaming and being drawn into the vacuum pump 6 3 Operate the vacuum pump for 20 to 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 ...

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 21A Pulling Vacuum Figure 21B 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 24 Top of wood stri...

Page 14: ...nstall the L brackets behind the inner window sill with the short side of bracket as shown Use the 2 screws 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 TYPE B 4EA WOOD SCREW HARDWARE TYPE A 11EA SHORT SCREW TYPE C 3EA L BACKET TYPE E 1EA SASH SEAL Not adhesive backed TYPE D 1EA SEAL STRIP Adhesive b...

Page 15: ...ill the window opening using 4 screws TYPE B to secure them as shown in Figure 31 5 INSTALL THE SASH SEAL AND SASH LOCK a Cut the sash seal TYPE E to the window width Stuff the sash seal between the glass and the window to prevent air and insects from getting into the room as shown in Figure 31 b Fasten the L bracket using a TYPE A screw as shown in Figure 31 6 Window installation of room air cond...

Page 16: ...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 grou...

Page 17: ...OTOR 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 PRESSURE...

Page 18: ...nce of inlet outlet air 55 59 F 13 15 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 t...

Page 19: ...ressor capacitor Replacement of compressor Motor damaged Irregular motor insulation Ω Irregular motor resistance Ω Check of circuit breaker and fuse Gas leakage of feeler bulb of thermostat Check control switch 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 r...

Page 20: ...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 21: ... to the wiring diagram for terminal identification Replace the switch if the circuit is open Thermostat Check the position of knob If not at the coldest setting advance the knob to this setting and restart the unit Check the continuity of the thermostat Replace the thermostat if the circuit is open Capacitor discharge Check the capacitor capacitor before Replace if not within 10 of manufacturer s ...

Page 22: ...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 23: ...BL BK POWER INPUT BK BR Plain WH BL Ribbed GN GN YL RD BL YL OR BR 4 6 8 1 3 5 7 BL RD BK BR WIRING DIAGRAM SYNC M S C 3 4 Q TY PER SET 1 1 1 1 1 1 1 LOCATION NO 1 2 3 4 5 6 7 DESCRIPTION POWER CORD ASSY FAN MOTOR COMPRESSOR ROTARY SWITCH THERMOSTAT CAPACITOR OVERLOAD PROTECTOR 2H00677P 4681A10016C 2520UCAA003 2H00154H 2H01109H 0CZZA20005B 6750U L050A PART NO ...

Page 24: ...54210 349480 352390 1 149980 559011 346811 554030 W48602 130910 550140 554160 567502 352115 352111 352113 35211A 135313 152302 135312 731273 264110 238310 W0CZZ 249950 268711 2 263230 237200 268711 1 267110 147582 1 147582 2 145200 749740 135301 249940 ...

Page 25: ...6871A20432B PCB ASSEMBLY DISPLAY R 346811 4681A10016N MOTOR ASSEMBLY AC SINGLE R 349480 4948A10016B ORIFICE R 352111 5211AR3332N TUBE ASSEMBLY CAPILLARY R 352113 5211A10129A TUBE ASSEMBLY DISCHARGE R 352115 5211A10063E TUBE ASSEMBLY EVAPORATOR IN R 35211A 5211A10062G TUBE ASSEMBLY SUCTION R 352380 5238A20013A GUIDE AIR R 352390 5239A30003G GUIDE ASSEMBLY AIR R 354210 5421A20016L EVAPORATOR ASSEMBL...

Page 26: ... ASSEMBLY SINGLE 4681A10016M R 349480 ORIFICE 4948A10016B R 35211A TUBE ASSEMBLY SUCTION SINGLE 5211A10062G R 352113 TUBE ASSEMBLY DISCHARGER SINGLE 5210A21748B R 352115 1 TUBE ASSEMBLY EVAPORATOR IN 5210A10063E R 352390 AIR GUIDE ASSEMBLY LOWER 5990AR3190D R 352390 1 AIR GUIDE ASSEMBLY UPPER 5239A30003G R 550140 ISOLATOR COMP 2520UCAA004 R 352111 TUBE ASSEMBLY CAPILLARY OUT 5211AR3332X R 554160 C...

Page 27: ...January 2008 Printed in China ...

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