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LG Room
Air Conditioner
SERVICE MANUAL
MODEL: LW1200PR
LW1200ER
LW1000PR
LW1000ER
LW1004ER
LWL1210WAL
LWL1230WAL
WM-1231
LW1000ERY3
LB1000ER
LB1200ER
LW100CS
LW120CS
LW1000PRY3
LW1200PRY3
LW1200ERY3
website http://www.lgservice.com
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LG
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Table of Contents
Troubleshooting
Related Manuals for LG LW1200PR
Summary of Contents for LG LW1200PR
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Page 1: Service Manual
LG Room Air Conditioner SERVICE MANUAL MODEL: LW1200PR LW1200ER LW1000PR LW1000ER LW1004ER LWL1210WAL LWL1230WAL WM-1231 LW1000ERY3 LB1000ER LB1200ER LW100CS LW120CS LW1000PRY3 LW1200PRY3 LW1200ERY3 CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL. -
Page 2: Table Of Contents
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions............................3 Dimensions ..............................5 Outside Dimensions ...........................5 Product Specifications ..........................6 Installation ...............................7 Select the Best Location ..........................7 Installation Check ............................7 How to Secure the Drain Pipe ........................7 How to Install..............................8 Suggested Tool Requirements ........................9 Operation ..............................12 Function of Controls ..........................12 Disassembly ..............................15... -
Page 3: Safety Precautions
Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury. - Page 4 Safety Precautions Do not modify or extend the power cord. Do not install, remove, or re-install the unit by yourself(customer). • There is risk or fire or electric shock. • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpacking and installing Do not store or use flammable gas or com- the product.
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Page 5: Dimensions
Dimensions Dimensions Symbols Used in this Manual This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that could cause harm to the air conditioner. This symbol indicates special notes. NOTICE Outside Dimensions Cool ˚C F1 LOW F2 MED... -
Page 6: Product Specifications
550g (19.4 oz) 480(17.0 oz) 470(16.6 oz) REFRIGERANT (R-22) CHARGE 3 ROW 12 STACKS, SLIT-FIN TYPE 2 ROW 10 STACKS, LG-LOUVER TYPE 2 ROW 12 STACKS EVAPORATOR 2 ROW 17 STACKS, L-BENDED TYPE 2 ROW 17 STACKS, LG-LOUVER TYPE 2 ROW17 STACKS... -
Page 7: Installation
Installation Installation Select the Best Location 1.To prevent vibration and noise, make sure the unit is installed securely and firmly. FENCE 2.Install the unit where the sunlight does not shine direct- AWNING ly on the unit. COOLED AIR 3.The outside of the cabinet must extend outward for at HEAT least 12"... -
Page 8: How To Install
Installation How to Install When Using Gasket Cool ˚C Cool ˚C F1 LOW F1 LOW F2 MED Energy F2 MED F3 HIGH Energy F3 HIGH Saver Saver TEMP Timer TEMP Timer RIGHT SIDE MODE TIMER POWER MODE TIMER SPEED POWER SPEED HORIZONTAL LINE... -
Page 9: Suggested Tool Requirements
Installation Suggested Tool Requirements SCREWDRIVER (+, -), RULER, KNIFE, HAMMER, PENCIL, LEVEL Preparation of Chassis Shipping 1. Remove the screws that fasten the cabinet at both Screws sides and at the back. 2. Slide the unit out from the cabinet by gripping the base pan handle and pulling forward while bracing the cabinet. - Page 10 Installation 3. Loosely assemble the sill support using the parts INDOOR OUTDOOR Figure Sill Support Bolt Figure 4 4. Select the position that will place the sill support near the outer most point on sill (See Figure Frame Guide Screw(Type A) Be careful when you install the cabinet NOTICE (Frame Guides...
- Page 11 Installation 10. Slide the unit into the cabinet.(See Fig. 8) CAUTION: For security purpose, reinstall screws (Type A) at the cabinet's sides. Power cord Cool Energ Saver Time TIME Screw(Type A) Screw(Type A) Figure 8 11. Cut the Foam-Strip to the proper length and insert between the upper and lower window sash.
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Page 12: Operation
Operation Operation Function of Controls • Designed for COOLING ONLY. • Built-in adjustable Thermistor • Powerful and whispering cooling. • Washable one-touch filter • Slide-in and slide-out chassis for the simple instal- • Compact size lation and service. • Reliable and efficient rotary compressor •... -
Page 13: Remote Control
Operation DISPLAY REMOTE CONTROL LW1200PR, LW1000PR, LWL1210WAL, LW1000PRY3, LW1200PRY3 LWL1230WAL, LW100CS, LW120CS PURIFIER Power Purifier COOL HEAT DEFROST COOL Temp ENERGY ENERGY SAVER SAVER INDOOR DESIRED INDOOR DESIRED PURYFIER PURIFIER Fan Speed AUTO CLEAN RESTART FILTER Sleep Mode TIMER MODE... - Page 14 Operation FAN SPEED SELECTOR Every time you push this button, it is set as follows..) COOL DRY HEAT DEFROST COOL DRY HEAT DEFROST COOL DRY HEAT DEFROST ENERGY ENERGY ENERGY SAVER SAVER SAVER INDOOR DESIRED INDOOR DESIRED INDOOR DESIRED PURYFIER PURYFIER PURYFIER...
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Page 15: Disassembly
Disassembly Disassembly — Before the following disassembly, set the CONTROL BOX to OFF and disconnect the power cord. Mechanical Parts 1. Front Grille 1. Open the lnlet grille downward and remove the air filter. 2. Remove the screw that fastens the front grille.(See Figure 14) 3. -
Page 16: Air Handling Parts
Disassembly Air Handling Parts 4. Air Guide and Turbo Fan 1. Remove the front grille. (Refer to section 1) 2. Remove the cabinet. (Refer to section 2) 3. Remove the control box. (Refer to section 3) 4. Remove the 4 screws that fasten the brace. 5. -
Page 17: Electrical Parts
Disassembly 6. Shroud 1. Remove the fan. (Refer to section 2.2.2) 2. Remove the shroud. (See Figure 8) 3. Re-install the components by referring to the removal procedure, above. Figure 21 Electrical Parts 7. Overload Protector 1. Remove the cabinet. (Refer to section 2) 2. - Page 18 Disassembly 9. Capacitor 1. Remove the control box. (Refer to section 3) 2. Open the top cover from the control box. (See Figure 24) 3. Pull out the capacitor from the control box. 4. Disconnect all the leads of capacitor terminals. 5.
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Page 19: Refrigerating Cycle
Disassembly 11. Motor 1. Remove the cabinet. (Refer to section 2) 2. Remove the turbo fan. (Refer to section 4) 3. Remove the fan. (Refer to section 5) 4. Remove the 4 screws that fasten the motor from the air guide. (See Figure 26) 5. -
Page 20: Capillary Tube
Disassembly 14. Capillary Tube 3. Remove the capillary tube. 1. Remove the cabinet. (Refer to section s2) 4. Re-install the components by referring to notes. 2. After discharging the refrigerant completely, unbraze the interconnecting tube at the capillary tube.(See caution above) NOTICE —... - Page 21 Disassembly Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. Figure 29B-Charging Figure 29A-Pulling Vacuum Service Manual 21...
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Page 22: Schematic Diagram
Schematic Diagram Schematic Diagram Electronic Control Device 22 Room Air Conditioner... - Page 23 Schematic Diagram MODEL: LW1200PR / LW1000PR / LWL1210WAL / LWL1230WAL / LW100CS / LW120CS LW1004ER / LB1000ER Service Manual 23...
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Page 24: Wiring Diagram
Schematic Diagram Wiring Diagram CN-AC/DC CN-AC/DC CN-MOTOR GN/YL MOTOR DC PCB ASSEMBLY CAPACITOR CN-TH1 POWER TRANS THERMISTOR CN-PWR SWITCH DC12V FUSE CN-12V Ribbed 250V/T2A (115V/T2A) H.V. Plain CN-HVB ASSEMBLY GN/YL RY-COMP COMP. AC PCB ASSEMBLY AIR FILTER WIRING DIAGRAM 3854AR3563N ASSEMBLY S: Service Parts N: Non Service Parts... -
Page 25: Components Location
Schematic Diagram Components Location 1. MAIN P.C.B ASSEMBLY LW1004ER / LB1000ER R01T Q01T CN-MOTOR CN-HVB CN-TELE CN-TH2 Q03T C03T Q04T CN-PWR QIC02DT CN-4WAY ZNR01J C01J R01J C02D C04D C05D E03J E02J E01J C01D E04J E05J POWER TRANS RY-COMP FUSE 250V/T2A ASSEMBLY:6871A20167 LW1000PRY3/LW1200PRY3 2. - Page 26 Schematic Diagram MODEL: LW1200PR/LW1000PR/LWL1210WAL/LWL1230WAL ASSEMBLY:6871A20168 PWB:6870A90066A RECEIVER C02L IC01A C02A J2ZD02F ZD01F CN-TH1 BZ01E C05D SW04G SW01G SW05G SW02G SW06G SW03G TIMER FAN SPEED MODE TEMP DOWN TEMP UP POWER MODEL: LW1200ER/LW1000ER PCB:6870A90067A ASSEMBLY:6871A20186 MODEL: LW120CS/LW100CS/LW1000PRY3/LW1200PRY3/LW1004ER 26 Room Air Conditioner...
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Page 27: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL CAPILLARY TUBE MOTOR COMPRESSOR TURBO FAN EVAPORATOR COIL Figure 30 is a brief description of the important components and their function in what is called the refrigeration system. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle. ROOM AIR CONITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS... -
Page 28: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused from an electrical defect, and the other is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit runs but poor cooling. - Page 29 Troubleshooting Guide Fails to Start Check of power source. Check circuit breaker and fuse. Check of control switch Gas leakage of feeler bulb setting. of thermostat Check of control switch. Compressor only fails to Fan only fails to start. start. Improper wiring.
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Page 30: Electrical Parts Troubleshooting Guide
Troubleshooting Guide Electrical Parts Troubleshooting Guide Possible Trouble 1 The unit does not operate. Is the • Check the Fuse. Trans input power AC 115V? • Check the wiring diagram. (208/230V for LWL1230WAL) • Check the Main Is the Trans output power Is shorted the Trans. - Page 31 Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is setting • Select the setting Temp. to lower Number. Temp. set lower than Room Temp.-0.5°C? Is the voltage No.10 Is the voltage N0.9 of Does the Unit delay of IC01M 0V? IC01M DC 12V? for 3 minutes? •...
- Page 32 Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.1 or 2 or 4 • Replace IC01M. of IC01M DC 12V? Is the voltage NO.16 or 15 or 13 • Replace IC01M. of IC01M 0V? • Check the RY-Hi or RY-Med or RY-Lo.
- Page 33 Troubleshooting Guide Possible Trouble 6 Remote controller does not operate. Is the voltage of Battery • Replace the battery. over 2.3V? Is the voltage No.10 • Check the PCB pattern. of CN-AC/DC on DC PCB Ass'y DC 5V? • Connect connector to Is the connection of CN-AC/DC exactly.
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Page 34: Electrical Parts
Troubleshooting Guide Electrical Parts Possible Trouble 1 The unit does not operate. Is the • Check the Fuse. Trans input power AC 115V? • Check the wiring diagram. (208/230V for LWL1230WAL) • Check the AC Is the Trans output power Is shorted the Trans. - Page 35 Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is desired • Select the desired Temp. to lower Number. Temp. set lower than Room Temp.-0.5°C? Is the voltage No.10 Is the voltage N0.9 of Is the Unit for 3 minutes of IC01M 0V? IC01M DC 12V? delay?
- Page 36 Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.1 or 2 or 4 • Replace IC01M. of IC01M DC 5V? Is the voltage NO.16 or 15 or 13 • Replace IC01M. of IC01M 0V? • Check the RY-Hi or RY-Med or RY-Lo.
- Page 37 Troubleshooting Guide Possible Trouble 6 It displays abnormally on DC PCB Ass’y. • Replace IC01G, Are IC01G and IC02G IC02G. • Connect connector Is the connection of to CN-AC/DC exactly. CN-AC/DC OK? Does the IC03G • Replace IC03G. operate normally on AC PCB Ass'y? •...
- Page 38 Troubleshooting Guide COMPLAINT CAUSE REMEDY Fan motor will not run. No power Check voltage at outlet. Correct if none. Power supply cord Check voltage to Control Box. If none, check power supply cord. Replace cord if circuit is open. Wire disconnected or con- Connect wire.
- Page 39 Troubleshooting Guide COMPLAINT CAUSE REMEDY Compressor will not run, Thermistor Check the TEMP control. If not at the lowest number, but fan motor runs. set TEMP control to this setting and restart the unit. Check the continuity of the thermistor. Replace the thermistor if the circuit is open.
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Page 40: Exploded View
Exploded View Exploded View 130910 554030 149980 148000 W48602 346811 359012 352390 559011 W48602 354212 267110 152312 145200 147582-1 349001 135312 567502 147581 147582-2 349480 554160 152302 130410 135313 550140 249950 352115-1 552111 352115-2 268714 W0CZZ 135500 268712 352115 D ES 238310 A IR FI ER... -
Page 41: Replacement Parts List
Replacement Parts List Replacement Parts List PART NO. LOCATION REMARK DESCRIPTION LW1200PR LW1200ER 130410 BASE PAN WELD ASS'Y 3041A20020J 130910 CABINET ASS'Y 3091A10032C 135312 FRONT GRILL ASS'Y 3531A20098A 135313 INLET GRILLE 3530A20037A 135500 COVER, CONTROL BOX 3550A30114A 145200 LINK 4520A20007A... - Page 42 Replacement Parts List PART NO. LOCATION REMARK DESCRIPTION LW1000ERY3 LW1000PR LW1000ER LW1004ER LB1000ER 130410 BASE ASSEMBLY,SINGLE 3041A20020L 3041A20020L 3041A20020L 3041A20020L 130910 CABINET ASSEMBLY,SINGLE 3091A10032C 3091A10032C 3091A10032C 3091A10032C 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A20098A 3531A20098A 3531A20098A 3531A20098A 135313 GRILLE,INLET 3530A20037A 3530A20037A 3530A20037A 3530A20037A 135500 COVER 3550A30114A 3550A30114A...
- Page 43 Replacement Parts List PART NO. LOCATION REMARK DESCRIPTION LWL1210WAL LWL1230WAL WM-1231 130410 BASE ASSEMBLY, SINGLE 3041A20020J 130910 CABINET ASSEMBLY,SINGLE 3091A10032K 3091A10032M 135303 GRILLE,INLET 3530A20037A 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A20098B 3531A20098A 147581 LOUVER,HORIZONTAL 4758A20018A 4758A20018A 147582-1 LOUVER,VERTICAL 4758A20041A 147582-2 LOUVER, VERTICAL 4758A20041B 148000 BRACE 4800A30002B...
- Page 44 Replacement Parts List PART NO. LOCATION REMARK DESCRIPTION LB1200ER LW100CS LW120CS 130410 BASE ASSEMBLY,SINGLE 3041A20020J 3041A20020L 3041A20020J 130910 CABINET ASSEMBLY,SINGLE 3091A10032C 3091A10032C 3091A10032C 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A20098A 3531A20098E 3531A20098A 135313 GRILLE,INLET 3530A20037A 3530A20037A 3530A20037A 135500 COVER 3550A30114A 3550A30114A 3550A30114A 147581 LOUVER,HORIZONTAL 4758A20018A 4758A20018A...
- Page 45 Replacement Parts List PART NO. LOCATION REMARK DESCRIPTION LW1000PRY3 LW1200PRY3 LW1200ERY3 130410 BASE ASSEMBLY,SINGLE 3041A20020L 3041A20020J 3041A20020J 130910 CABINET ASSEMBLY,SINGLE 3091A10032C 3091A10032C 3091A10032C 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A20098A 3531A20098A 3531A20098A 135313 GRILLE,INLET 3530A20037A 3530A20037A 3530A20037A 135500 COVER 3550A30114A 3550A30114A 3550A30114A 147581 LOUVER,HORIZONTAL 4758A20018A 4758A20018A...
- Page 46 October, 2006 P/No.: 3828A20140B Printed in Korea...