website http://www.lgservice.com LG LG Room Air Conditioner SERVICE MANUAL MODELS: LW1800PR LW1800ER LW1800ERZ3 LW1500PR LW1500PRY3 LWP1830WAL LWP1820PDL LWP1820PEL LWC182PLMM0 LWC183PLMD1 LWC212PLMM0 LW1804ER LW1800PRZ3 HBLG1803R CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions..........................................................................................................................................3 Dimensions .....................................................................................................................................................5 Outside dimensions............................................................................................................................
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. CAUTION This symbol indicates the possibility of injury or damage to properties only.
Safety Precautions Do not modify or extend the power cord. • There is risk or fire or electric shock. Do not install, remove, or re-install the unit by yourself(customer). • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpacking and installing the product. • Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator. Do not store or use flammable gas or combustibles near the air conditioner.
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. NOTICE This symbol indicates special notes.
Specfications Product Specifications MODELS ITEMS POWER SUPPLY 1ø, 208/230V, 60Hz 1ø, 115V, 60Hz CAPACITY 18,000 15,000 (W) 1,670 1,300 1,930 12 9.0 RUNNING CURRENT (A) E.E.R (BTU/W.h) CAPACITY 7.5 7.8 10.8 18,000 11.5 1ø, 220V, 60Hz 1ø, 208/230V, 60Hz 24,000 17,500/18,000 1,890 2,440 1,620/1,670 8.8 11.5 10.8 9.0/8.3 9.8 8.0/7.5 9.7/9.7 9.5 (BTU/h) - 18,000 - (W) - 1,930 - RUNNING CURRENT (A) - 9.0 - E.E.R - 9.
Installation Installation Select the Best Location 1/4 Bubble Level AWNING FENCE FOAM HEAT RADIATION COOLED AIR 30-60" 1. To avoid vibration and noise, make sure the unit is installed securely and firmly. 2. Install the unit where the sunlight does not shine directly on the unit. If the unit receives direct sunlight, build an awning to shade the cabinet. 3. There should be no obstacle, like a fence, within 20" which might restrict heat radiation from the condenser. 4.
Installation How to Install When Using Installation Kits 1. Window Requirements This unit is designed for installation in standard double hung windows with actual opening widths from 29" to 41". The top and bottom window sash must open sufficiently to allow a clear vertical opening of 16" from the bottom of the upper sash to the window stool. 29" to 41" 18" min Stool Offset Less 11/4" Sill Exterior Interior wall 26" min (Without frame curtain) 2.
Suggested tool Requirements SCREWDRIVER(+, -), RULER, KNIFE, HAMMER, PENCIL, LEVEL Preparation of Chassis Shipping Screws 1. Remove the screws which fasten the cabinet at both sides and at the back. Keep these two screws which fasten the cabinet at both sides for later use. CH DOE O A FL T RO ST 2. Slide the unit out from the cabinet by gripping the base pan handle and pulling forward while bracing the cabinet. Figure 2 3. Cut the window sash seal to the proper length.
Installation Cabinet Installation 1. Open the window. Mark a line on the center of the window stool between the side window stop moldings. Loosely attach the sill bracket to the support bracket using the carriage bolt and the lock nut. Sill Bracket Support Bracket Lock nut Carriage Bolt (M-Screw) Figure 5 2. Attach the sill bracket to the window sill using the screws (Type B).
Installation 5. Pull each Frame curtain fully to each window sash track, and pull the bottom window sash down behind the Top retainer bar until it meets. Screw(Type C) 6. Attach each Frame curtain the window sash by using screws (Type C). (See Fig. 10) Figure 10 7. Slide the unit into the cabinet. (See Fig. 11) CAUTION: For security purpose, reinstall screws (Type A) at cabinet's sides. Power Cord Screw Screw (Type A) Figure 11 8.
Operation Operation Function of Controls • Designed for COOLING ONLY. • Powerful and quiet cooling. • Slide-in and slide-out chassis for the simple installation and service. • Low air-intake, top cooled-air discharge. • Built-in adjustable Thermistor • Washable one-touch filter • Compact size • Equipped with reliable and efficient rotary compressor.
Operation FAN SPEED SELECTOR Every time you push this button, it is set as follows. (Hi ➔ Low ➔ Med ➔ Hi ➔ Low ➔...
Operation DISPLAY LW1800ER REMOTE CONTROL LWC182PLMM0, LWC212PLMM0 6 7 6 Power °F Power 1 F1 LOW F2 MED 1 Temp F3 HIGH Temp 2 DRY COOL TIMER FAN ENERGY SAVER MODE TEMP POWER 5 4 3 2 1 4 Mode 5 FAN SPEED Fan Speed 4 Timer TIMER 2 Fan Speed 2 Timer 3 Mode 3 5 Auto Swing 7 3 5 4 1 LW1800ERZ3, HBLG1803R Cool ˚F F1 LOW F2 MED F3 HIGH Energy Saver 6 Fan Dry 3 Timer 5 2 TEMP 4 1 Precaution: The Remote Control unit will not function properly if strong light
Operation ■ LWP1820PDL/PEL DISPLAY REMOTE CONTROL 6 1 4 5 2 1 4 3 2 5 3 7 6 4 5 1 3 2 POWER BUTTON Operation starts, when this button is pressed and stops when you press the button again. ROOM TEMPERATURE SETTING BUTTON Control the room temperature within a range of 16°C to 30°C. The room temperature will be adjusted by 1˚C 30min., and by 2˚C 1 hour later. OPERATION MODE SELECTION BUTTON Select Cooling, Heating, or Fan mode with this button. FAN SPEED SELECTOR Select the fan speed.
Disassembly Disassembly — Before the following disassembly, CONTROL BOX set 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 15) 3. Pull the front grille from the right side. 4. Remove the front grille.(There are 4 hooks.) 5. Re-install the components by referring to the removal procedure, above. 2. Cabinet 1.
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. Remove the brace. 6. Remove the 2 screws that fasten the air guide upper. 7. Remove the air guide upper.(See Figure 18) 8. Remove the 2 screws that fasten the evaporator. 9. Move the evaporator forward and pulling it upward slightly. (See Figure 19) 10.
Disassembly 6. Shroud 1. Remove the fan. (Refer to section 5) 2. Remove the shroud. (See Figure 22) 3. Re-install the components by referring to the removal procedure, above. Figure 22 Electrical Parts 7. Overload Protector 1. Remove the cabinet. (Refer to section 2) 2. Remove the nut that fastens the terminal cover. 3. Remove the terminal cover. (See Figure 23) 4. Remove all the leads from the overload protector. 5. Remove the overload protector. 6.
Disassembly 9. Capacitor 1. Remove the control box. (Refer to section 3) 2. Open the top cover from the control box. (See Figure 25) 3. Pull out the capacitor from the control box. 4. Disconnect all the leads of capacitor terminals. 5. Re-install the components by referring to the removal procedure, above.
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 27) 5. Remove the motor. 6. Re-install the components by referring to the removal procedure, above.(See Figure 27) Figure 27 Refrigerating Cycle 12. Condenser CAUTION: Discharge the refrigerant system using a FreonTM Recovery System.
Disassembly 14. Capillary Tube 1. Remove the cabinet. (Refer to section s2) 2. After discharging the refrigerant completely, unbraze the interconnecting tube at the capillary tube.(See caution above) 3. Remove the capillary tube. 4. Re-install the components by referring to notes. NOTICE — Replacement of the refrigeration cycle. 1. When replacing the refrigeration cycle, be sure to Discharge the refrigerant system using a FreonTM recovery System.
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.
MAIN POWER CAPACITOR COMP HERM C FAN FAN MOTOR S/V4WAY HVB SW1 SW2 PIPE-TH 1 2 1 2 3 1 3 1 9 7 9 7 1 1 5 1 1 3 3 3 5 1 1 3 2 3 3 2 3 3 1 1 2 1 1 2 2 2 YW396-09AV YW396-03AV 0.1 50V J5 C01T 125V/T2A FUSE G4A-1A-E-LG RY-COMP CN-MOTOR YW396-03AV(YL) CN-4WAY SMW200-03(WH) CN-12V SMW200-03(YL) CN-CONT SMW200-03(BL) CN-HVB SMW250-02 CN-TH2 CN-PWR 1 3 3 2 2 3 3 1 R01J SVC271D-14A ZNR01J 120 1/2W 0.
MAIN POWER FAN COMP HERM C CAPACITOR FAN MOTOR S/V4WAY HVB SW1 SW2 PIPE-TH 1 2 1 2 3 1 3 1 9 7 7 9 5 1 1 5 1 1 3 3 3 3 1 1 3 2 3 2 3 3 1 1 2 1 1 2 2 2 YW396-03AV CN-PWR YW396-09AV 250V/T2A FUSE G4A-1A-E-LG RY-COMP CN-MOTOR YW396-03AV(YL) J5 C01T 5V 0.
Schematic Diagram HIGH PRESSURE SWITCH RY-HI RY-MED CN-TH2 CN-P/S GN/YL (GN) RY-4WAY ROOM THERMISTOR PIPE THERMISTOR WH(BL) (Ribbed) OR(BR) BK C FUSE 250V/T2A (115V/T2A) BK(BR) (Plain) 2 WH(BL) (Ribbed) SWITCH CN-12V GN/YL (GN) CN-HVB COMP. 3 BL OLP WIRING DIAGRAM AC PCB ASSEMBLY 3854AR3563U BK RD 3 4 S BL OLP 4 ■ MODEL : LWC182PLMM0/LWC212PLMM0 R C 8 AIR FILTER ASSEMBLY CN-HVB 3 COMP. WIRING DIAGRAM SWITCH DC12V CN-12V FUSE 250V/T2A (115V/T2A) BK(BR) (Plain) H.V.
Schematic Diagram Components Location ■ MODEL: LW1800PR/LW1800ER LW1500PR/LWP1830WAL LWP1820PDL/LWP1820PEL LW1800ERZ3/LW1804ER LWC183PLMD1 J1 CN-AC/DC CN-12V ■ MODEL: LWC182PLMM0/LWC212PLMM0 LW1500PRY3/LW1800PRZ3 HBLG1803R CN-CON D02D J5 D03D D04D CN-HVB HEAT SINK D05D C03T J4 Q02T J6 D01T C02T J2 RY-MED CN-TELE C05D RY-LOW Q04T QIC02DT C04D J3 RY-4WAY R01T Q01T Q03T C02D RY-COMP ASSEMBLY:6871A20167 C01D IC01D RY-HI J7 CN-TH2 FUSE POWER TRANS CN-PWR R01J E03J J8 ZNR01J E0
Schematic Diagram ■ MODEL: LW1800ER/LWP1820PDL/LWP1820PEL ■ MODEL: LW1804ER/LW1500PRY3/LW1800PRZ3/LWC183PLMD1 Service Manual 27
Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL FAN CAPILLARY TUBE MOTOR COMPRESSOR TURBO FAN EVAPORATOR COIL Figure 31 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.
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. Ineffective Cooling Check cold air circulation for smooth flow. Check outdoor coil (heat exchanger) & the fan operation. Dirty indoor coil (Heat exchanger) Check gas leakage.
Troubleshooting Guide Fails to Start Check of power source. Check circuit breaker and fuse. Check of control switch setting. Gas leakage of feeler bulb of thermostat Check of control switch. Compressor only fails to start. Fan only fails to start. Improper wiring. Drop of power voltage. Improper thermostat setting. Defect of fan motor capacitor. Defect of compressor capacitor. Loose terminal connection. Capacitor check. Irregular motor resistance ( ). Irregular motor insulation ( ).
Troubleshooting Guide Electrical Parts Troubleshooting Guide Possible Trouble 1 The unit does not operate. Is the Trans input power AC 115V? (208/230V for LWL1230WAL) NO • Check the Fuse. • Check the wiring diagram. YES Is the Trans output power about AC 14V? NO YES Is output Voltage of IC01D DC 12V? Is shorted the Trans. output? YES NO NO • Check the Main PCB pattern. • Replace the Trans. • Replace D02D~D05D. • Replace IC01D. YES Is output Voltage of IC02D DC 5V? NO • Replace IC02D.
Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is setting Temp. set lower than Room Temp.-0.5°C? NO • Select the setting Temp. to lower Number. YES NO Is the voltage No.10 of IC01M 0V? Is the voltage N0.9 of IC01M DC 12V? YES YES • Check the RY-COMP. • Check the wiring Diagram. • Replace IC01M. NO Does the Unit delay for 3 minutes? NO YES • Wait 3 Minutes. • Replace MAIN PCB Ass'y. Possible Trouble 3 The compressor always operate.
Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.1 or 2 or 4 of IC01M DC 12V? NO • Replace IC01M. YES Is the voltage NO.16 or 15 or 13 of IC01M 0V? NO • Replace IC01M. YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Possible Trouble 5 The function of Energy Saver does not operate. Is the mode key pushed once more from cool mode? NO • Set the mode key to Energy Saver mode. YES Is the voltage No.
Troubleshooting Guide Possible Trouble 6 Remote controller does not operate. Is the voltage of Battery over 2.3V? NO • Replace the battery. YES Is the voltage No.10 of CN-AC/DC on DC PCB Ass'y DC 5V? NO • Check the PCB pattern. YES NO Is the connection of CN-AC/DC OK? • Connect connector to CN-AC/DC exactly. YES • Replace Receiver Ass'y. Possible Trouble 7 It displays abnormally on DC PCB Ass’y. NO Is the IC01G good? • Replace IC01G.
Troubleshooting Guide ElectrIc Parts Possible Trouble 1 The unit does not operate. Is the Trans input power AC 115V? (208/230V for LWL1230WAL) NO • Check the Fuse. • Check the wiring diagram. YES Is the Trans output power about AC 14V? NO YES Is output Voltage of IC01D DC 12V? Is the Trans. output shorted? YES NO NO • Check the AC PCB pattern. • Replace the Trans. • Replace D02D~D05D. • Replace IC01D. YES Is output Voltage of IC02D DC 5V? NO • Replace IC02D.
Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is desired Temp. set lower than Room Temp.-0.5°C? NO • Select the desired Temp. to lower Number. YES NO Is the voltage No.10 of IC01M 0V? Is the voltage N0.9 of IC01M DC 12V? YES YES • Check the RY-COMP. • Check the wiring Diagram. • Replace IC01M. NO Is the Unit for 3 minutes delay? NO YES • Wait 3 Minutes. • Replace AC PCB Ass'y. Possible Trouble 3 The compressor always operate.
Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.1 or 2 or 4 of IC01M DC 5V? NO • Replace IC01M. YES Is the voltage NO.16 or 15 or 13 of IC01M 0V? NO • Replace IC01M. YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Possible Trouble 5 Remote controller does not operate. Is the voltage of Battery over 2.3V? NO • Replace the battery. YES Is the voltage No.10 of CN-AC/DC on AC PCB Ass'y DC 5V? NO • Check the PCB pattern.
Troubleshooting Guide Possible Trouble 6 It displays abnormally on DC PCB Ass’y. Are the IC01G and IC02G good? NO • Replace IC01G, IC02G. NO • Connect connector to CN-AC/DC exactly. YES NO Is the connection of CN-AC/DC OK? YES Does IC03G operate normally on AC PCB Ass'y? YES • Replace the DC PCB Ass'y. 38 Room Air Conditioner NO • Replace IC03G.
Troubleshooting Guide COMPLAINT Fan motor will not run. CAUSE REMEDY 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 connection loose Connect wire. Refer to wiring diagram for terminal identification. Repair or replace loose terminal. Capacitor (Discharge capacitor before testing.) Test capacitor. Replace if not within ±10% of manufacturer's rating.
Troubleshooting Guide COMPLAINT Compressor will not run, but fan motor runs. Compressor cycles on overload. Compressor cycles on overload. Compressor cycles on overload. Insufficient cooling or heating Excessive noise CAUSE REMEDY 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 capacitor before servicing.
Exploded View Exploded View ■ COOLING MODEL 130910 559010 554031 149980 148000 346811 W48602 359012 W48602 349480 152312 349600 354210 267110 147582-1 147581 349001 567502 147582-2 352390-2 352390-1 135312 554160 152302 130410 550140 135303 249950 268714 W0CZZ W52106-1 352111 135500 268712 W52106-2 CO OL FA N IND OO R DR Y FA N HE AT DE SIR ED 238310 DE FR OS T EN SAERGY VE R PU AIR RY FIE AU RE TO R STA RT 263230 TIME Co ol En erg Sa y ver Fa n Dr FA SP N EE D y MO DE
Exploded View ■ HEATING MODEL 130910 554031 267110 148000 149980 W48602 346811 359012 559010 W48602 349480 152312 349600 354210 147582-1 147581 349001 567502 147582-2 352390-2 352390-1 135312 554160 152302 130410 550140 135303 249950 268714 W0CZZ 352115-1 268712 CO 352115-2 OL FA IND OO R N DR Y FA HE N DE SIR ED 238310 552111 135500 AT DE FR OS T EN ER SA GY VE R PU AIR RY FIE AU RE TO R ST AR T 352113 263230 TIM ER FA SP N EE D 264110 MOD E TE MP PO WER 237200 42 Room
Replacement Parts List Replacement Parts List LOCATION NO. 130410 130910 135303 135312 147581 147582-1 147582-2 148000 149980 152302 159830 237200 238310 249950 263230 264110 267110 268712 268714 349001 349480 349600 352113 35211A 352390-1 352390-2 354210 359012 550140 552111 554031 559010 567502 W0CZZ W48602 W52106-1 W52106-2 554160 346811 PART NO.
Replacement Parts List LOCATION NO. DESCRIPTION 130410 130910 135303 135312 135500 146812 147581 147582-1 147582-2 148000 149980 152302 152312 237200 238310 249950 263230 264110 268712 268714 346811 349001 349480 349600 352111 352113 352115-1 352115-2 35211A 352390-1 352390-2 354210 359012 550140 552101 552111 554031 554160 559010 567502 W0CZZ W48602 267110 BASE ASSEMBLY, WELD[SINGLE] CABINET ASSEMBLY, SINGLE GRILLE, INLET GRILLE ASSEMBLY, FRONT(SINGLE) COVER MOTOR ASSEMBLY,SYNC.
Replacement Parts List LOCATION NO. 130410 130910 135303 135312 135500 146812 147581 147582-1 147582-2 148000 149980 152302 152312 237200 238310 249950 263230 263230 264110 267110 268712 268714 346811 349001 349480 349600 35211A 352111 352113 352115-1 352115-2 35211A 352390-1 352390-2 354210 359012 550140 552101 552111 552113 552116 552202 554031 554160 559010 561410 566000 567502 W0CZZ W48602 267110 PART NO.
Replacement Parts List LOCATION NO. 130410 130910 135312 135303 135500 147581 147582-1 147582-2 148000 149980 152302 152312 237200 249950 268712 238310 268714 263230 264110 346811 349001 349480 349600 352111 352113 W52106-1 W52106-2 35211A 352390-1 352390-2 354210 567502 550140 554031 554160 559010 359012 W48602 W0CZZ 267110 PART NO.
Replacement Parts List LOCATION NO. 130410 130910 135303 135312 135500 147581 147582-1 147582-2 148000 149980 152312 237200 238310 249950 263230 263230 264110 267110 268712 268714 346811 349001 349480 349600 35211A 352111 352115-1 352115-2 352390-1 352390-2 354210 359012 550140 552111 552113 552116 552202 554031 554160 559010 561410 566000 567502 W0CZZ W48602 PART NO.
LOCATION NO. 130410 130910 135303 135312 135500 146812 147581 147582-1 147582-2 148000 149980 152302 152312 237200 238310 249950 263230 264110 267110 268712 268714 346811 349001 349480 349600 352113 352115-1 352115-2 35211A 352390-1 352390-2 354210 359012 550140 552101 552111 554031 554160 559010 567502 W0CZZ W48602 PART NO. DESCRIPTION BASE ASSEMBLY,WELD[SINGLE] CABINET ASSEMBLY,SINGLE GRILLE,INLET GRILLE ASSEMBLY,FRONT(SINGLE) COVER MOTOR ASSEMBLY,SYNC.
LOCATION NO. 130410 130910 135303 135312 135500 147581 147582-1 147582-2 148000 149980 152302 237200 238310 249950 263230 264110 267110 268712 268714 346811 349001 349480 349600 352111 352113 352390-1 352390-2 354210 359012 550140 554031 554160 559010 35211A W0CZZ W48602 W52106-1 W52106-2 PART NO.
P/No.