LG LW8012ER Service Manual
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LG LW8012ER Service Manual

Lg room air conditioner
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See also: Owner's Manual
LG Room
Air Conditioner

SERVICE MANUAL

MODEL:LW8012ER
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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Summary of Contents for LG LW8012ER

  • Page 1: Service Manual

    LG Room Air Conditioner SERVICE MANUAL MODEL:LW8012ER 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 ..............................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...

  • 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. This symbol indicates the possibility of death or serious injury.
  • Page 4 Safety Precautions Plug in the power plug Do not operate or stop the Do not damage or use an properly. unit by inserting or pulling unspecified power cord. out the power plug. • Otherwise, it will cause • It will cause electric shock or •...
  • Page 5 Safety Precautions If water enters the product, turn off the the power Do not clean the air conditioner with water. switch of the main body of appliance. Contact ser- vice center after taking the power-plug out from the socket. • It will cause electric shock or failure of machine. •...

  • Page 6: 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 F1 LOW F2 MED Energy...

  • Page 7: Product Specifications

    Product Specifications Product Specifications Buyer Model LW8012ER PERFORMANCE BTU performance (Cooling) 8,000 BTU performance (Heating) 10.8 Dehumid. ( Pts/Hr) Dry Air Flow (CFM) dBA Level (Indoor / Outdoor) 54/60 Est. Cooling Area (SQ.FT) Electrical Ratings Voltage / 60 Hz Plug Type...

  • Page 8: Installation

    Installation Installation Select the Best Location 1. To prevent vibration and noise, make sure the unit is installed securely and firmly. 2. Install the unit where the sun does not shine directly on the INSIDE OUTSIDE unit. FENCE 3. The outside of the cabinet must extend outward for at least AWNING 12"...

  • Page 9: How To Install

    Installation How to Install INNER Window Requirements SILL All supporting parts should be secured to NOTICE firm wood, masonry, or metal. 1. This unit is designed for installation in standard double hung windows with actual opening widths of 22" to 36". The upper and lower sash must open sufficiently to allow a clear vertical opening of 13"...

  • Page 10: Before Installation

    Installation BEFORE INSTALLATION 1. Insert the guide panels into the guides of the air conditioner. Fasten the curtains to the unit with screws (TYPE A) as Type A shown Figure. 5. 2. Cut the adhesive-backed seal strip (TYPE D) to the window width.

  • Page 11: Removal From Window

    Installation 4. SECURE THE GUIDE PANELS L Bracket Extend the guide panels (TYPE F) to fill the window Type A opening using 4 screws (TYPE B) to secure them, as shown in Figure. 11. Sash Seal (Type F) 5. INSTALL THE SASH SEAL AND SASH LOCK Type B a.

  • Page 12: Operation

    Operation Operation • Designed for COOLING ONLY. • Built-in adjustable Thermistor • Powerful and quiet cooling. • Washable one-touch filter • Top-down chassis for the simple instal- • Compact size lation and service. • Equipped with reliable and efficient rotary •...

  • Page 13: 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 12) 3.

  • Page 14: 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 15: Electrical Parts

    Disassembly 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 19) 4. Remove all the leads from the overload protec- tor.
  • Page 16 Disassembly 10. Power Cord 1. Remove the control box. (Refer to section 3) 2. Open the top cover from the control box. (Refer to section 9) 3. Disconnect the front panel from the control box. (See Figure 22) 4. Disconnect two leads from the capacitor and relay.

  • Page 17: Refrigerating Cycle

    Disassembly Refrigerating Cycle 12. Condenser CAUTION: Discharge the refrigerant system using a Freon Recovery System. If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the Freon Leave the valve in place after servicing the system.
  • Page 18 Disassembly NOTICE — Replacement of the refrigeration cycle. 6. Recharge as follows : 1. When replacing the refrigeration cycle, be sure to Discharge the refrigerant system using a Freon 1) Refrigeration cycle systems are charged from recovery System. the High-side. If the total charge cannot be put If there is no valve to attach the recovery system, in the High-side, the balance will be put in the install one (such as a WATCO A-1) before venting...
  • Page 19 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 25B-Charging Figure 25A-Pulling Vacuum Service Manual 19...

  • Page 20: Schematic Diagram

    Schematic Diagram Schematic Diagram Electronic Control Device 20 Room Air Conditioner...

  • Page 21: 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/T3.15A H.V. CN-HVB Plain ASSEMBLY GN/YL RY-COMP COMP. AC PCB ASSEMBLY AIR FILTER WIRING DIAGRAM ASSEMBLY S: Service Parts N: Non Service Parts LOCATION Q'TY...

  • Page 22: Components Location

    Schematic Diagram Components Location 1. MAIN P.C.B ASSEMBLY 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/T3.15A ASSEMBLY:6871A20417C 2. DISPLAY P.C.B. ASSEMBLY PCB:6870A90067C ASSEMBLY:6871A20418A 22 Room Air Conditioner...

  • Page 23: Troubleshooting Guide

    Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL CAPILLARY TUBE MOTOR COMPRESSOR TURBO FAN EVAPORATOR COIL Figure 26 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 24: 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 25 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.

  • Page 26: Electrical Parts Troubleshooting Guide

    Troubleshooting Guide Electrical Parts Troubleshooting Guide The unit does not operate. Possible Trouble 1 Is the • Check the Fuse. • Check the Fuse. Trans input power AC 115V? • Check the wiring diagram. • Check the wiring diagram. • Check the Main Is the Trans output power Is shorted the Trans.
  • Page 27 Troubleshooting Guide The compressor does not operate. Possible Trouble 2 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 28 Troubleshooting Guide FAN does not operate. Possible Trouble 4 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 29 Troubleshooting Guide Remote controller does not operate. Possible Trouble 6 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 • Check the PCB pattern. Ass'y DC 5V? •...

  • Page 30: Electrical Parts

    Troubleshooting Guide Electrical Parts The unit does not operate. Possible Trouble 1 Is the • Check the Fuse. • Check the Fuse. Trans input power AC 115V? • Check the wiring diagram. • Check the wiring diagram. • Check the AC Is the Trans output power Is shorted the Trans.
  • Page 31 Troubleshooting Guide The compressor does not operate. Possible Trouble 2 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 32 Troubleshooting Guide FAN does not operate. Possible Trouble 4 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 33 Troubleshooting Guide It displays abnormally on DC PCB Ass’y. Possible Trouble 6 • 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 34 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 35 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.

  • Page 36: Exploded View

    Exploded View Exploded View 731373 132111-2 554030 267110 149980 132111-1 130910 749740 W48602 346811 359012 359011 W48602 354210 352380-1 352380-3 147582-2 352380-2 147582-1 349001-2 135312 567502 145200 147581 349480 349001-1 554160 159830 130411 135303 249950 352115 552113 W0CZZ 135500 268711-2 268711-1 237200 238310...

  • Page 37: Replacement Parts List

    January, 2005 P/NO:3828A29003C Printed in China...

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