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LG W081CA SG2 Service Manual
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Room Air Conditioner 
SERVICE MANUAL
CAUTION
-BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
-ONLY FOR AUTHORIZED SERVICE.
W W 0 0 8 8 1 1 C C A A
W W 0 0 9 9 1 1 C C A A
MODEL:  
W W 0 0 9 9 2 2 C C A A
W W 1 1 2 2 1 1 C C A A
W W 1 1 2 2 2 2 C C M M
W W 1 1 2 2 1 1 C C M M
W W 1 1 2 2 1 1 C C M M H H
W W 1 1 2 2 2 2 C C M M
W W 1 1 2 2 2 2 C C M M H H
W121CM SC4
website http://www .LGEservice.com
e-mail http://www .LGEservice.com/techsup.html
W W 1 1 8 8 2 2 C C A A
S S G G 2 2
W W 1 1 8 8 2 2 C C M M
T T S S G G 0 0
W W 1 1 8 8 2 2 C C M M H H
T T S S G G 0 0
W W 2 2 4 4 2 2 C C A A
T T S S C C 2 2
W W 2 2 4 4 2 2 C C M M
T T S S C C 0 0
W W 0 0 8 8 1 1 C C M M
S S C C 2 2
W W 1 1 2 2 1 1 C C M M H H
S S C C 3 3
W W 242C C M M
S S C C 0 0
W W 2 2 4 4 2 2 C C A A
S S C C 1 1
T T S S N N 0 0
T T S S N N 0 0
T T S S N N 1 1
T T S S N N 0 0
T T S S N N 0 0
T T S S G G 2 2
S S C C 3 3
T S N 2
T T S S N N 2 2

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Summary of Contents for LG W081CA SG2

  • Page 1 website http://www .LGEservice.com e-mail http://www .LGEservice.com/techsup.html Room Air Conditioner  SERVICE MANUAL CAUTION -BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. -ONLY FOR AUTHORIZED SERVICE. W W 0 0 8 8 1 1 C C A A W W 1 1 8 8 2 2 C C A A S S G G 2 2 T T S S N N 0 0 W W 0 0 9 9 1 1 C C A A W W 1 1 8 8 2 2 C C M M...
  • Page 2: Table Of Contents

    CONTENTS 1. PREFACE 2.4 REFRIGERATION CYCLE ......10 2.4.1 CONDENSER........10 1.1 SAFETY PRECAUTIONS........2 2.4.2 EVAPORATOR........10 1.2 INSULATION RESISTANCE TEST ....2 2.4.3 CAPILLARY TUBE .......11 1.3 SPECIFICATIONS...........3 1.4 FEATURES............3 3. INSTALLATION 1.5 CONTROL LOCATIONS .........4 3.1 SELECT THE BEST LOCATION....13 2. DISASSEMBLY INSTRUCTIONS 3.2 CHECK OF INSTALLATION......13 3.3 HOW TO DRAIN..........13 2.1 MECHANICAL PARTS ........6...
  • Page 3 1.3 SPECIFICATIONS MODEL W081CA. W121CMH. W081CM.TSG2  SG2      W121CM   W121CM  SC4 ITEM POWER SUPPLY 1Ø,115V,60Hz COOLING CAPACITY (Btu/h) 8 000 12 000 INPUT 1200 1100 RUNNING CURRENT 10.2 E.E.R (BTU/W.h) 10.8 OPERATING INDOOR(℃) 26.7(DB),19.4(WB) CONDITION OUTDOOR(℃) 35(DB),23.9(WB) REFRIGERANT(R-22)CHARGE 260g(9.2oz) 375g(13.2oz) 505g(17.8oz) EVAPORATOR       2R 14STACKS  ...
  • Page 4 1.3 SPECIFICATIONS MODEL W122CM. W122CMH.            ITEM POWER SUPPLY 1Ø,220V,60Hz COOLING CAPACITY (Btu/h) 12 000 INPUT 1220 1110 RUNNING CURRENT E.E.R (BTU/W.h) 10.8 OPERATING INDOOR(℃) 26.7(DB),19.4(WB) CONDITION OUTDOOR(℃) 35(DB),23.9(WB) REFRIGERANT(R-22)CHARGE 395g(13.9oz) 495g(17.5oz) EVAPORATOR 2R 13STACKS CONDENSER 2R 18STACKS 2R 17STACKS FAN,INDOOR TURBO FAN,OUTDOOR...
  • Page 5 SPECIFICATIONS MODEL W091CA.TSG0 W092CA.TSG0 W121CA.TSC2 W122CA.TSC0 ITEM 1Φ,115V,60Hz 1Φ,220V,60Hz 1Φ,115V,60Hz 1Φ,220V,60Hz POWER SUPPLY 9000 12000 COOLING CAPACITY (Btu/h) 1000 1220 INPUT RUNNING CURRENT E.E.R (Btu/W.h) 26.7(DB) ,19.4(WB) OPERATING INDOOR (℃) 35.0(DB) ,23.9(WB) CONDITION OUTDOOR (℃) 350g(12.3oz) 365g(12.9) 375g(13.2) 395g(13.9) REFIGERANT(R-22) CHARGE 2R 12STACKS 2R 16STACKS 2R 13STACKS EVAPORATOR...
  • Page 6 SPECIFICATIONS MODEL W242CA.TSN0 W242CM.TSN0 W0182CA.TSN0 W182CM.TSN0 ITEM W242CA.TSN2 W242CM.TSN2 220V,60Hz POWER SUPPLY 18000 24000 COOLING CAPACITY (Btu/h) 1850 2820 INPUT 12.9 RUNNING CURRENT E.E.R (Btu/W.h) 26.7(DB) ,19.4(WB) OPERATING INDOOR 35.0(DB) ,23.9(WB) CONDITION OUTDOOR 720g(25.4oz) 830g(29.3oz) REFIGERANT(R-22) CHARGE 2R 15STACKS 2R 16STACKS 2R 13STACKS EVAPORATOR 2R 16STACKS 1R 16STACKS 2R 18STACKS...
  • Page 7: Specifications

    SPECIFICATIONS MODEL W182CMH ITEM ,220V~,60Hz POWER SUPPLY 17 800 COOLING CAPACITY (Btu/h) 1 660 INPUT RUNNING CURRENT 26.7(DB) ,19.4(WB) OPERATING INDOOR (℃) 35.0(DB) ,23.9(WB) CONDITION OUTDOOR (℃) 7800g(27.5oz) REFIGERANT(R-22) CHARGE P9.52 3R 15C EVAPORATOR P9.52 2R 16C CONDENSER TURBO FAN,INDOOR PROPELLER TYPE FAN WITH SLINGER-RING FAN,OUTDOOR FAN,SPEEDS,FAN/COOLING...
  • Page 8: Features

    1.4 FEATURES • Built-in adjustable THERMOSTAT • Designed for COOLING ONLY. • Washable one-touch filter • Powerful and whispering cooling. • Compact size • Slide-in and slide-out chassis for the simple • Reliable and efficient rotary compressor is equipped. installation and service. •...
  • Page 9 1.5.2 COOLING ONLY MODEL WITH REMOTE CONTROL AND TOUCH TYPE DISPLAY REMOTE CONTROL Precaution: The Remote Control unit will not function properly if strong light strikes the sensor window of the air conditioner or if there are obstacles between the Remote Control unit and the air conditioner. POWER BUTTON To turn the air conditioner ON, push the button.
  • Page 10: Disassembly Instructions

    2. DISASSEMBLY INSTRUCTIONS — Before the following disassembly, POWER SWITCH set to OFF and disconnect the power cord. 2.1 MECHANICAL PARTS 2.1.1 FRONT GRILLE 1. Open the lnlet grille upward . 2. Remove the screw which fastens the front grille. 3.
  • Page 11: Air Handling Parts

    2.2 AIR HANDLING PARTS 2.2.1 AIR GUIDE AND BLOWER 1. Remove the front grille. (Refer to section 2.1.1) 2. Remove the cabinet. (Refer to section 2.1.2) 3. Remove the control box. (Refer to section 2.1.3) 4. Remove the 4 screws which fasten the brace. 5.
  • Page 12: Shroud

    2.2.3 SHROUD 1. Remove the fan. (Refer to section 2.2.2) 2. Remove the screw which fastens the shroud. 3. Remove the shroud. (See Figure 8) 4. Re-install the component by referring to the removal procedure, above. Figure 8 2.3 ELECTRICAL PARTS 2.3.1 OVERLOAD PROTECTOR 1.
  • Page 13: Capacitor

    2.3.3 CAPACITOR 1. Remove the control box. (Refer to section 2.1.3) 2. Remove the knobs and the screw which fasten control panel from control box. 3. Remove the screw which located in the front. 4. Open the bottom side of control box. 5.
  • Page 14: Motor

    2.3.7 MOTOR 1. Remove the cabinet. (Refer to section 2.1.2) 2. Remove the evaporator. (Refer to section 2.2.1) 3. Remove the orifice. (Refer to section 2.2.1) 4. Remove the blower. (Refer to section 2.2.1) 5. Remove the fan. (Refer to section 2.2.2) 6.
  • Page 15: Capillary Tube

    2.4.3 CAPILLARY TUBE 3. Remove the capillary tube. 4. Re-install the component by referring to notes. 1. Remove the cabinet. (Refer to section 2.1.2) 2. After discharging the refrigerant completely, unbraze the interconnecting tube at the capillary tube.(See caution above) NOTES —...
  • Page 16 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 18B-Charging Figure 18A-Pulling Vacuum —16—...
  • Page 17: Installation

    3. INSTALLATION 3.1 SELECT THE BEST LOCATION 1.To prevent vibration and noise, make sure the unit FENCE AWNING is installed securely and firmly. 2.Install the unit where the sunlight does not shine COOLED AIR HEAT directly on the unit. RADIATION 3.The outside of the cabinet must extend outward for at least 12"...
  • Page 18: How To Install

    3.4 HOW TO INSTALL SUGGESTED TOOL REQUIREMENTS SCREWDRIVER(+, -), RULLER, KNIFE, HAMMER, PENCIL, LEVEL PREPARATION OF CHASSIS 1. Before installing the room air conditioner, please install the knob. (If it is not fixed on the unit.) 2. Remove the screws which fasten the cabinet at Figure 22 both sides and at the back.
  • Page 19: How To Use The Reversible Inlet Grille

    3.5 HOW TO USE THE REVERSIBLE INLET GRILLE 1. If you want to pull out the filter upward, open the inlet grille slightly. Turn inside out the front grille. Disassemble the inlet grille from the front grille with separating the hinged part by inserting a "—" type screw-driver tip.
  • Page 20: Troubleshooting Guide

    4. TROUBLESHOOTING GUIDE 4.1 OUTSIDE DIMENSIONS unit: mm(inch) Chassis A B C WG 525 470 353 WC 567 600 380 WN 770 660 428 4.2 PIPING SYSTEM CONDENSER COIL CAPILLARY TUBE MOTOR COMPRESSOR BLOWER EVAPORATOR COIL Figure 34 is a brief description of the important components and their function in what is called the refrigeration system.
  • Page 21: Troubleshooting Guide

    4.3 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 22 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. Drop of power voltage.
  • Page 23 I ELECTRICAL PARTS TROUBLESHOOTING GUIDE: M1203R/WM-1211 Possible Trouble 1 The unit does not operate. • Check the Fuse. • Check the Fuse. Is the Trans input power • Check the wiring diagram. • Check the wiring diagram. AC 115V? • Check the Main Is the Trans output power Is shorted the Trans.
  • Page 24 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.11 Is the voltage N0.6 of Is the Unit for 3 minutes of IC01M 0V? IC01M DC 5V? delay? •...
  • Page 25 Possible Trouble 4 FAN does not operate. Is the voltage NO.2 or 3 or 4 • Exchange IC01M. of IC01M DC 5V? Is the voltage NO.13 or 14 or 15 • Exchange IC01M. of IC01M 0V? • Check the RY-Hi or RY-Med or RY-Lo.
  • Page 26 Possible Trouble 6 Remote controller does not operate. Is the voltage of Battery • Exchange the battery. about over 2.3V? Is the voltage No.10 • Check the PCB pattern. of CN-DISP2 on Main PCB • Check the PCB pattern. Ass'y DC 5V? •...
  • Page 27 I ELECTRICAL PARTS TROUBLESHOOTING GUIDE: M1003L, M1203L Possible Trouble 1 The unit does not operate. • Check the Fuse. Is the Trans input power • Check the wiring diagram. AC 115V? • Check the Main Is the Trans output power Is shorted the Trans.
  • Page 28 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.16 Is the voltage N0.1 of Is the Unit for 3 minutes of IC01M 0V? IC01M DC 5V? delay? •...
  • Page 29 Possible Trouble 4 FAN does not operate. Is the voltage NO.4 or 5 or 6 • Exchange IC01M. of IC01M DC 5V? Is the voltage NO.11 or 12 or 13 • Exchange IC01M. of IC01M 0V? • Check the RY-Hi or RY-Med or RY-Lo.
  • Page 30 Possible Trouble 6 It displays abnormally on display PCB Ass’y. • Exchange IC01G, Are the IC01G and IC02G IC02G. all right? • Connect connector Is the connection of to CN-DISP2 exactly. CN-DISP2 all right? Does the IC03G • Exchange IC03G. operate normally on main PCB Ass'y? •...
  • Page 31 COMPLAINT CAUSE REMEDY Fan motor will not run. No power Check voltage at outlet. Correct if none. Power supply cord Check voltage to rotary switch. If none, check power supply cord. Replace cord if circuit is open. Rotary switch Check switch continuity. Refer to wiring diagram for terminal identification.
  • Page 32 COMPLAINT CAUSE REMEDY Compressor will not run, Thermostat Check the position of knob If not at the coldest but fan motor runs. setting, advance the knob to this setting and restart unit. Check continuity of the thermostat. Replace thermostat if circuit is open. Capacitor (Discharge Check the capacitor.
  • Page 33: Schematic Diagram

    5. SCHEMATIC DIAGRAM 5.1 CIRCUIT DIAGRAM MODEL : W182CA. MODEL : W081CA. TSN0 W091CA. TSG0 W242CA. TSN0 W092CA. TSG0 W121CA. TSC2 W122CA. TSC0 MOTOR COMP. P.T.C S: Service Parts N: Non Service Parts RE- LOCATION Q'TY DESCRIPTION MARKS NO. PER SET 1 POWER CORD 1 S 2 ROTARY SWITCH 1 S 3 FAN MOTOR...
  • Page 34 I MODEL : W081CM/W121CM/W122CM/W121CMH/W122CMH/W182CA/W182CM/W182CMH/W242CA/W242CM POWER INPUT WH(BL) BK(BR) (Ribbed) (Plain) GN/YL(GN) THERMISTOR CN-TH1 MOTOR OR(BR) OR(BR) GN/YL (GN) CAPACITOR OR(BR) RY-SYNC RY-COMP COMP. TRANS FORMER FUSE 250V/T2A (115V/T2A) 3854AR2330P WIRING DIAGRAM S: Service Parts N: Non Service Parts LOCATION Q'TY DESCRIPTION MARKS PER SET...
  • Page 35: Electronic Control Device

    5.2 ELECTRONIC CONTROL DEVICE I MODEL: W081CM/W121CM/W122CM/W121CMH/W122CMH/W182CA/W182CM/W182CMH/W242CA/W242CM A : Heat Pump Only —35—...
  • Page 36 5.3 COMPONENTS LOCATION I MODEL: W081CM/W121CM/W122CM/W121CMH/W122CMH(Main PCB) I MODEL: W081CM/W121CM/W122CM/W121CMH/W122CMH(Display PCB) —36—...
  • Page 37: Components Location(For Main P.c.b Asm)

    Schematic Diagram Components Location I MODEL: W182CM/W182CMH/W242CM(Main PCB) PWB P/NO:6871A10193 I MODEL: W182CM/W182CMH/W242CM(Display PCB) PWB P/NO:6871A20611 —37—...
  • Page 38: Exploded View

    6. EXPLODED VIEW 554030 359011 130910 148000 149980 346811 W48602 352380 349600 359012 354210 W48602 349480 349001 567502 147582 152302 135303 135312 130410 554160 550140 147581 W5210E-1 552102 249950 266003 552113 269300 W5210E-2 W0CZZ 237200 352113 135500 149410 35211A 264100 —38—...
  • Page 39 6. EXPLODED VIEW 554030 359011 130910 148000 149980 346811 W48602 352380 349600 359012 354210 W48602 349480 349001 567502 147582 135303 152302 135312 130410 554160 550140 147581 W5210E-1 552102 249950 567480 552113 W0CZZ W5210E-2 268711-1 238310 352113 237200 264100 135500 35211A 268711-2 —39—...
  • Page 40 7. REPLACEMENT PARTS LIST R: Service Parts N: Non Service Parts LOCATION PART NO(2005) DESCRIPTION REMARK W081CA W121CM.sc2     W121CMH.sc3 130410 BASE ASSEMBLY,SINGLE 3041A30011D 3041A20012R 130910 CABINET ASSEMBLY,SINGLE 3091A28001A 3091A20029D 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A20034N 3531A21008B 3531A21008F 135303 GRILLE ASSEMBLY,INLET 3530A10027A 3530A10182A 135500 COVER,CONTROL(INDOOR)
  • Page 41 R: Service Parts N: Non Service Parts LOCATION PART NO(2005) DESCRIPTION REMARK NO. W122CM.sc4   W122CMH 130410 BASE ASSEMBLY,SINGLE 3041A20012R 3041A20012N R 130910 CABINET ASSEMBLY,SINGLE 3091A20029D R 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A21008B 3531A21008F R 135303 GRILLE ASSEMBLY,INLET 3530A10182A 3530A10182A R 135500 COVER,CONTROL(INDOOR) 3550AR7032A R PANEL ASSEMBLY,CONTROL 3720A10003A R 237200 147581...
  • Page 42 LOCATION PART NO(2006) DESCRIPTION REMARK W091CA W092CA W121CA.sc2 W122CA.TSC4 W122CA.SC1  TWC123CBAA1 3041A20012R 130410 BASE ASSY,SINGLE 3041A28001B 3041A30005P 3041A20012N 3091A20029D 130910 CABINET ASSY,SINGLE 3091A28001A 3091A28001C 3531A20034N 3531A21008B 135312 GRILLE ASSY,FRONT(SINGLE) 3531A21008G 135303 GRILLE ASSY,INLET 3530A10027A 3530A10182A 3550A30036B 3550AR7032A 135500 COVER,CONTROL(INDOOR) 4758A20002A 4758A20051A 147581 LOUVER,HORIZONTAL 4758A30008A 4758AR7308A 147582 LOUVER,VERTICAL...
  • Page 43 Replacement Parts List Replacement Parts List PART NO(2007) DESCRIPTION LOCATION NO. REMARK W121CM SC4 3041A20012R 130410 BASE ASSEMBLY,SINGLE 3091A20029D 130910 CABINET ASSEMBLY,SINGLE 3531A21008B 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3530A10182A 135303 GRILLE ASSEMBLY,INLET 3720A10003A 237200 PANEL ASSEMBLY,CONTROL 3550AR7032A 135500 COVER ASSEMBLY,CONTROL(SINGLE) 4758AR7308A 147582 LOUVER,VERTICAL 4758A20051A 147581...
  • Page 44 PART NO(2006) LOCATION DESCRIPTION REMARK W182CA W242CA W182CM W242CM 130410 3041A10008R 3041A10008V 3041A10008R 3041A10008V R BASE ASSEMBLY,SINGLE 130910 R 3091AR6056N CABINET ASSEMBLY,SINGLE 135312 R 3531A11002A GRILLE ASSEMBLY,FRONT(SINGLE) 135313 R 3530A10189A GRILLE ASSEMBLY,INLET 135500 R 3551A30015A COVER,CONTROL(INDOOR) 137215 3721A20058N 3720AR6163A R PANEL ASSEMBLY,CONTROL 147581...
  • Page 45 PART NO(2006) LOCATION DESCRIPTION REMARK W182CMH TSN1 130410 3041A10008X R BASE ASSEMBLY,SINGLE 130910 3091AR6056N R CABINET ASSEMBLY,SINGLE 135312 3531A11002A R GRILLE ASSEMBLY,FRONT(SINGLE) 135313 3530A10189A R GRILLE ASSEMBLY,INLET 135500 6871A20611C R PWB(PCB) ASSEMBLY,DISPLAY 147582 4758AR6157A R LOUVER,VERTICAL 147581-1 VANE,HORIZONTAL 5990A20032A R 147582-2 VANE,HORIZONTAL 5990A20033A...
  • Page 46 Replacement Parts List Replacement Parts List PART NO(2007) LOCATION NO. DESCRIPTION REMARK W242CM TSN2 BASE ASSEMBLY,SINGLE 3041A30001F 130410 CABINET ASSEMBLY,SINGLE 3091AR6056N 130910 3531A11002A GRILLE ASSEMBLY,FRONT(SINGLE) 135312 GRILLE ASSEMBLY,INLET 3530A10189A 135313 3720AR6163A PANEL ASSEMBLY,CONTROL 137215 3551A30015A COVER ASSEMBLY,CONTROL(SINGLE) 135500 LOUVER,VERTICAL 4758AR6157A 147582 5990A20032A LOUVER,HORIZONTAL...
  • Page 47 Replacement Parts List Replacement Parts List LOCATION DESCRIPTION REMARK W242CA TSN2 BASE ASSEMBLY,SINGLE 3041A30001F 130410 CABINET ASSEMBLY,SINGLE 3091A20001F 130910 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A11002A 135312 GRILLE ASSEMBLY,INLET 135313 3530A10189A PANEL ASSEMBLY,CONTROL (机械) 137215 3721A20058N COVER ASSEMBLY,CONTROL(SINGLE) 3551A30015A 135500 LOUVER,VERTICAL 4758AR6157A 147582 LOUVER,HORIZONTAL 147581-1 5990A20032A LOUVER,HORIZONTAL...
  • Page 48 MEMO —44—...
  • Page 49 MEMO —45—...
  • Page 50 January, 2005 Printed in China P/No : 3828A28007E...

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