Service Manual
Page 1
website http://www.lgservice.com LG LG Room Air Conditioner SERVICE MANUAL MODEL: LWHD8000R,LWHD8000RY5,LWHD1000R,LWHD8000RY6 CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
website http://www.lgservice.com LG LG Room Air Conditioner SERVICE MANUAL MODEL: LWHD8000R,LWHD8000RY5,LWHD1000R,LWHD8000RY6 CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
Service Manual
Page 2
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions...3 Dimensions ...6 Outside Dimensions ...6 Product Specifications ...7 Installation ...8 Select the Best Location ...8 Installation Check ...8 How to Secure the Drain Pipe ...8 How to Install...9 Operation ...12 Function of Controls ...12 Disassembly ...13 Mechanical Parts...13 Air handling Parts...14 Electrical Parts ...15 Refrigerating Cycle...17 Schematic Diagram...20...
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions...3 Dimensions ...6 Outside Dimensions ...6 Product Specifications ...7 Installation ...8 Select the Best Location ...8 Installation Check ...8 How to Secure the Drain Pipe ...8 How to Install...9 Operation ...12 Function of Controls ...12 Disassembly ...13 Mechanical Parts...13 Air handling Parts...14 Electrical Parts ...15 Refrigerating Cycle...17 Schematic Diagram...20...
Service Manual
Page 4
...Otherwise, it is loose or damaged. Do not operate with other appliances. • It will cause electric shock or fire. Use the air conditioner on a single outlet circuit. ON Do not damage or use the socket if it will cause electric shock or fire. shock. Ventilate before ...operating air conditioner when gas goes out. • It may cause explosion, fire, and burn. 4 Room Air Conditioner Safety Precautions Plug in damp environment. • It may cause fire and electric • It...
...Otherwise, it is loose or damaged. Do not operate with other appliances. • It will cause electric shock or fire. Use the air conditioner on a single outlet circuit. ON Do not damage or use the socket if it will cause electric shock or fire. shock. Ventilate before ...operating air conditioner when gas goes out. • It may cause explosion, fire, and burn. 4 Room Air Conditioner Safety Precautions Plug in damp environment. • It may cause fire and electric • It...
Service Manual
Page 5
... is not damaged by age or wear. • If the outer case is damaged, it damaged could result in the air conditioner falling out of appliance or performance deteriorate. Do not clean the air conditioner with water. • Water may cause injury. Leaving it must be repaired or replaced immediately. Contact service center after...
... is not damaged by age or wear. • If the outer case is damaged, it damaged could result in the air conditioner falling out of appliance or performance deteriorate. Do not clean the air conditioner with water. • Water may cause injury. Leaving it must be repaired or replaced immediately. Contact service center after...
Service Manual
Page 6
This symbol alerts you to the air conditioner. NOTICE This symbol indicates special notes. Outside Dimensions 30 (1 3/16") 492 (19 3/8") 42 (1 21/32") 100.3 (3 15/16") 27.5 (1 3/32") 497 (19 9/16") 42 (1 21/... (19 3/8") 497 (19 9/16") Cool Energy Saver F1 LOW 'F F2 MED F3 HIGH Fan Dry Timer TEMP MODE TIMER FAN SPEED POWER 315 (12 3/8") 6 Room Air Conditioner Dimensions Dimensions Symbols Used in this Manual This symbol alerts you to hazards that could cause harm to the risk of electric shock.
This symbol alerts you to the air conditioner. NOTICE This symbol indicates special notes. Outside Dimensions 30 (1 3/16") 492 (19 3/8") 42 (1 21/32") 100.3 (3 15/16") 27.5 (1 3/32") 497 (19 9/16") 42 (1 21/... (19 3/8") 497 (19 9/16") Cool Energy Saver F1 LOW 'F F2 MED F3 HIGH Fan Dry Timer TEMP MODE TIMER FAN SPEED POWER 315 (12 3/8") 6 Room Air Conditioner Dimensions Dimensions Symbols Used in this Manual This symbol alerts you to hazards that could cause harm to the risk of electric shock.
Service Manual
Page 8
... Check The setting conditions must be checked prior to initial starting. The green wire must be grounded. 2. Connect to the rear hole of the air conditioner. How to Secure the Drain Pipe In humid weather, excess water may cause the Base Pan to the outside. 5. To drain the water, ...such as a fence or wall, within 20" from the back of the cabinet because it will COOLED AIR prevent heat radiation of the structure. 4. ciency of the Base Pan. (Figure. 2) 8 Room Air Conditioner Drain Pipe Drain Cap Figure 2 OUTSIDE AWNING FENCE HEAT RADIATION 30"-60" CAUTION: All side louvers of...
... Check The setting conditions must be checked prior to initial starting. The green wire must be grounded. 2. Connect to the rear hole of the air conditioner. How to Secure the Drain Pipe In humid weather, excess water may cause the Base Pan to the outside. 5. To drain the water, ...such as a fence or wall, within 20" from the back of the cabinet because it will COOLED AIR prevent heat radiation of the structure. 4. ciency of the Base Pan. (Figure. 2) 8 Room Air Conditioner Drain Pipe Drain Cap Figure 2 OUTSIDE AWNING FENCE HEAT RADIATION 30"-60" CAUTION: All side louvers of...
Service Manual
Page 10
... 9. Personal injury or property damage may result if unit falls from the seal strip and attach the seal strip to the underside of the air conditioner. Cut the adhesive-backed seal strip (TYPE D) to the unit with the short side of the inner sill, as shown Figure. 5. 2....F F1 LOW F2 ME D F3 HIGH Fan Dry T imer TE MP Figure 9 WINDOW FRAME UPPER GUIDE C enter Line SEAL BOTTOM GUIDE ABOUT 1/4" 10 Room Air Conditioner Figure 10 L BRACKET Type A Figure 5 SEAL STRIP (TYPE D) Type A Figure 6 INNER SILL ROOM SIDE CENTER LINE Figure 7 INNER SILL OUTER SILL TYPE A...
... 9. Personal injury or property damage may result if unit falls from the seal strip and attach the seal strip to the underside of the air conditioner. Cut the adhesive-backed seal strip (TYPE D) to the unit with the short side of the inner sill, as shown Figure. 5. 2....F F1 LOW F2 ME D F3 HIGH Fan Dry T imer TE MP Figure 9 WINDOW FRAME UPPER GUIDE C enter Line SEAL BOTTOM GUIDE ABOUT 1/4" 10 Room Air Conditioner Figure 10 L BRACKET Type A Figure 5 SEAL STRIP (TYPE D) Type A Figure 6 INNER SILL ROOM SIDE CENTER LINE Figure 7 INNER SILL OUTER SILL TYPE A...
Service Manual
Page 11
... shown in Figure. 11. 6. keeping a firm grip on the air conditioner, raise the sash, and carefully tilt the air conditioner backward, draining any condensate water. See ELECTRICAL DATA for reinstallation later. NOTICE REMOVAL FROM WINDOW Trun the air conditioner off, disconnect the power cord, remove the L bracket and the ...screws installed through the top and bottom of room air conditioner is now completed. Lift the air conditioner from the window ad remove the sash seal from getting into the room, as shown in Figure. 11. 5....
... shown in Figure. 11. 6. keeping a firm grip on the air conditioner, raise the sash, and carefully tilt the air conditioner backward, draining any condensate water. See ELECTRICAL DATA for reinstallation later. NOTICE REMOVAL FROM WINDOW Trun the air conditioner off, disconnect the power cord, remove the L bracket and the ...screws installed through the top and bottom of room air conditioner is now completed. Lift the air conditioner from the window ad remove the sash seal from getting into the room, as shown in Figure. 11. 5....
Service Manual
Page 12
...4 1 REMOTE CONTROL Power 1 Temp 2 Fan Speed 4 Timer Mode 5 3 PRECAUTION: The Remote Control unit will start. POWER BUTTON To turn the air conditioner OFF, push the button again. Every time you push this button controls the time it will shift among COOL, ENERGY SAVER, FAN and DRY. - OPERATION... time will be set the time when the unit will turn off ➔ 1Hour ➔ 2Hours ➔ ... ) REMOCON SIGNAL RECEIVER 12 Room Air Conditioner If the unit is needed. If the unit is off . Starting operation (1Hour ➔ 2Hours ➔ 3Hours ➔ 4Hours ➔ 5Hours ...
...4 1 REMOTE CONTROL Power 1 Temp 2 Fan Speed 4 Timer Mode 5 3 PRECAUTION: The Remote Control unit will start. POWER BUTTON To turn the air conditioner OFF, push the button again. Every time you push this button controls the time it will shift among COOL, ENERGY SAVER, FAN and DRY. - OPERATION... time will be set the time when the unit will turn off ➔ 1Hour ➔ 2Hours ➔ ... ) REMOCON SIGNAL RECEIVER 12 Room Air Conditioner If the unit is needed. If the unit is off . Starting operation (1Hour ➔ 2Hours ➔ 3Hours ➔ 4Hours ➔ 5Hours ...
Service Manual
Page 14
... backward, and pull out from the base pan. 14. Shroud 1. Remove the control box. (Refer to section 2) 3. Remove the 2 screws that fasten the air guide upper. 7. Remove the fan. (See Figure 17) 7. Remove the clamp with hand pliers which fasten the condenser. 4. Remove the brace (Refer to section ...components by referring to the removal procedure, above . 5. Remove the brace. 6. Remove the front grille. (Refer to the removal procedure, above . 14 Room Air Conditioner Figure 15 Figure 16 Figure 17 Figure 18 Re-install by referring to section 1) 2. Remove the...
... backward, and pull out from the base pan. 14. Shroud 1. Remove the control box. (Refer to section 2) 3. Remove the 2 screws that fasten the air guide upper. 7. Remove the fan. (See Figure 17) 7. Remove the clamp with hand pliers which fasten the condenser. 4. Remove the brace (Refer to section ...components by referring to the removal procedure, above . 5. Remove the brace. 6. Remove the front grille. (Refer to the removal procedure, above . 14 Room Air Conditioner Figure 15 Figure 16 Figure 17 Figure 18 Re-install by referring to section 1) 2. Remove the...
Service Manual
Page 16
... the supply cord of this appliance is damaged, it must be replaced by referring to the above removal procedure, above .(See Figure 23) 16 Room Air Conditioner Figure 22 Figure 23 Re-install the components by referring to section 5) 4. Open the top cover from the control box. (See Figure 22) 4. Remove the...
... the supply cord of this appliance is damaged, it must be replaced by referring to the above removal procedure, above .(See Figure 23) 16 Room Air Conditioner Figure 22 Figure 23 Re-install the components by referring to section 5) 4. Open the top cover from the control box. (See Figure 22) 4. Remove the...
Service Manual
Page 18
... the recovery system, install one (such as follows : 1) Refrigeration cycle systems are charged from foaming and being drawn into the pinch-off connection. 18 Room Air Conditioner Disassembly NOTICE - Replacement of the manifold and entire system. If there is in figure 25B. Leave the valve in the system. After discharging the unit...
... the recovery system, install one (such as follows : 1) Refrigeration cycle systems are charged from foaming and being drawn into the pinch-off connection. 18 Room Air Conditioner Disassembly NOTICE - Replacement of the manifold and entire system. If there is in figure 25B. Leave the valve in the system. After discharging the unit...
Service Manual
Page 20
Schematic Diagram Schematic Diagram Electronic Control Device 20 Room Air Conditioner CN-TELE SMW200-03 (RD) 33 22 11 5V C01T 0.1 50V PIPE-TH CN-TH2 SMW250-02 11 22 C02T 0.001 D01T 1N4148 Q04T A104M ... 5V C05D + C06D 220 0.01 10V 50V 11 12V 12 CN-AC/DC 5V 51581-12(YEONHO) 52044-1245(MOLEX) ANGLE RY-COMP G4A-1A-E-LG ZNR01J SVC271D-14A SVC271D-14A FUSE 250VT3.15A POWER TRANS 1 7 D02D D05D 2 D03D 4 D04D + C01D D02D~D05D 1000 1N4004 35V 12V IC01D O I 7812 + C02D C03D...
Schematic Diagram Schematic Diagram Electronic Control Device 20 Room Air Conditioner CN-TELE SMW200-03 (RD) 33 22 11 5V C01T 0.1 50V PIPE-TH CN-TH2 SMW250-02 11 22 C02T 0.001 D01T 1N4148 Q04T A104M ... 5V C05D + C06D 220 0.01 10V 50V 11 12V 12 CN-AC/DC 5V 51581-12(YEONHO) 52044-1245(MOLEX) ANGLE RY-COMP G4A-1A-E-LG ZNR01J SVC271D-14A SVC271D-14A FUSE 250VT3.15A POWER TRANS 1 7 D02D D05D 2 D03D 4 D04D + C01D D02D~D05D 1000 1N4004 35V 12V IC01D O I 7812 + C02D C03D...
Service Manual
Page 22
MAIN P.C.B ASSEMBLY CN-CON J1 CN-AC/DC CN-12V D02D D03D D04D D05D IC01D J5 CN-HVB C03T J4 Q02T R01T Q01T J6 D01T C02T J7 CN-TELE CN-TH2 Q03T Q04T J3 RY-HI QIC02DT J2 HEAT SINK RY-MED RY-LOW C02D C04D C05D C01D PCB:6870A90068D CN-MOTOR CN-PWR ZNR01J R01J CN-4WAY C01J E03J E02J E01J J8 RY-4WAY RY-COMP ASSEMBLY:6871A20417C POWER TRANS FUSE 250V/T3.15A E04J E05J 2. ASSEMBLY PCB:6870A90067C ASSEMBLY:6871A20418A 22 Room Air Conditioner DISPLAY P.C.B. Schematic Diagram Components Location 1.
MAIN P.C.B ASSEMBLY CN-CON J1 CN-AC/DC CN-12V D02D D03D D04D D05D IC01D J5 CN-HVB C03T J4 Q02T R01T Q01T J6 D01T C02T J7 CN-TELE CN-TH2 Q03T Q04T J3 RY-HI QIC02DT J2 HEAT SINK RY-MED RY-LOW C02D C04D C05D C01D PCB:6870A90068D CN-MOTOR CN-PWR ZNR01J R01J CN-4WAY C01J E03J E02J E01J J8 RY-4WAY RY-COMP ASSEMBLY:6871A20417C POWER TRANS FUSE 250V/T3.15A E04J E05J 2. ASSEMBLY PCB:6870A90067C ASSEMBLY:6871A20418A 22 Room Air Conditioner DISPLAY P.C.B. Schematic Diagram Components Location 1.
Service Manual
Page 24
... cooling. Not on separate circuit. Clean condenser. Check clogging in refrigeration circuit. 24 Room Air Conditioner Satisfactory operation with temperature difference of inlet & outlet air ; 44~50°F(7~10°C) Replacement of compressor. Check heat load increase. Obstruction at air outlet Correct above trouble Check outdoor coil (heat exchanger) & the fan operation. Adjusting of...
... cooling. Not on separate circuit. Clean condenser. Check clogging in refrigeration circuit. 24 Room Air Conditioner Satisfactory operation with temperature difference of inlet & outlet air ; 44~50°F(7~10°C) Replacement of compressor. Check heat load increase. Obstruction at air outlet Correct above trouble Check outdoor coil (heat exchanger) & the fan operation. Adjusting of...
Service Manual
Page 26
..... ••CChheecckkththeewwiriirninggddiaiaggraramm. . NO (The No.14 of IC01D NO DC 12V? output? YES Replace AC PCB Ass'y. • Check the PCB pattern. 26 Room Air Conditioner YES • Replace the Trans. • Replace D02D~D05D. • Replace IC01D. • Replace IC02D. YES Is output Voltage of Micom is 5V.) YES Is...
..... ••CChheecckkththeewwiriirninggddiaiaggraramm. . NO (The No.14 of IC01D NO DC 12V? output? YES Replace AC PCB Ass'y. • Check the PCB pattern. 26 Room Air Conditioner YES • Replace the Trans. • Replace D02D~D05D. • Replace IC01D. • Replace IC02D. YES Is output Voltage of Micom is 5V.) YES Is...
Service Manual
Page 28
...; Set the mode key to Energy Saver mode. • Check the Energy Saver mode key. • Check the pattern of AC & DC PCB. 28 Room Air Conditioner
...; Set the mode key to Energy Saver mode. • Check the Energy Saver mode key. • Check the pattern of AC & DC PCB. 28 Room Air Conditioner
Service Manual
Page 30
... Micom is 5V.) YES Is the connection between NO AC and DC OK? YES Replace AC PCB Ass'y. • Check the PCB pattern. 30 Room Air Conditioner YES ••CChheecckktthheeFFuussee.. ••CChheecckkththeewwiriirninggddiaiaggraramm. . NO (The No.14 of IC02D NO DC 5V? Is the NO Trans input power AC 115V? YES...
... Micom is 5V.) YES Is the connection between NO AC and DC OK? YES Replace AC PCB Ass'y. • Check the PCB pattern. 30 Room Air Conditioner YES ••CChheecckktthheeFFuussee.. ••CChheecckkththeewwiriirninggddiaiaggraramm. . NO (The No.14 of IC02D NO DC 5V? Is the NO Trans input power AC 115V? YES...
Service Manual
Page 32
... Ass'y. • Replace IC01M. • Replace IC01M. • Replace the battery. ••CChheecckk tthheePPCCBBpaptatettrenr.n. • Connect connector to CN-AC/DC exactly. 32 Room Air Conditioner Troubleshooting Guide Possible Trouble 4 FAN does not operate. YES Is the connection of IC01M 0V? Possible Trouble 5 Remote controller does not operate. YES Is the...
... Ass'y. • Replace IC01M. • Replace IC01M. • Replace the battery. ••CChheecckk tthheePPCCBBpaptatettrenr.n. • Connect connector to CN-AC/DC exactly. 32 Room Air Conditioner Troubleshooting Guide Possible Trouble 4 FAN does not operate. YES Is the connection of IC01M 0V? Possible Trouble 5 Remote controller does not operate. YES Is the...
Service Manual
Page 34
... Check voltage at outlet. If it . Does the fan blade rotate freely? If not, replace fan motor. If not per wiring diagram, correct. 34 Room Air Conditioner Correct if none. If none, check power supply cord. If knocking sounds continue when running , replace motor. Check the wire connections, if loose, repair or...
... Check voltage at outlet. If it . Does the fan blade rotate freely? If not, replace fan motor. If not per wiring diagram, correct. 34 Room Air Conditioner Correct if none. If none, check power supply cord. If knocking sounds continue when running , replace motor. Check the wire connections, if loose, repair or...