Table of Contents
Troubleshooting
Related Manuals for LG LWHD1500ER
Summary of Contents for LG LWHD1500ER
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Page 1: Service Manual
LG Room Air Conditioner SERVICE MANUAL MODELS: LWHD1500ER,LWHD1800R,L1804R 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 Cabinet Installation.............................9 Operation ..............................11 Function of Controls ..........................11 Disassembly ..............................12 Mechanical Parts............................12... -
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 F1 LOW F2 MED Energy... -
Page 6: Product Specifications
Specfications Product Specifications MODELS LWHD1800R L1804R LWHD1500ER ITEMS POWER SUPPLY 1¦µ £¬ 115V£¬ 60Hz 1¦µ £¬ 208/230V£¬ 60Hz 17,500/18,000 CAPACITY (BTU/h) 15,000 INPUT 1380 1800/1850 COOLING RUNNING CURRENT 12.0 9.0/8.3 E.E.R (BTU/W.h) 10.8 9.7/9.7 CAPACITY (BTU/h) INPUT HEATING RUNNING CURRENT E.E.R... -
Page 7: Installation
Installation Installation Select the Best Location 1. To avoid vibration and noise, make sure the unit is installed 1/4 Bubble 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. -
Page 8: How To Install
Installation How to Install When Using Installation Kits 1. Window Requirements 29" to 41" This unit is designed for installation in standard double hung windows with actual opening 18" min Stool Offset widths from 29" to 41". The top and bottom window sash must open suffi- Less 1 "... -
Page 9: Cabinet Installation
Installation Cabinet Installation 1. Open the window. Mark a line on the center of the window stool between the side window stop moldings. Sill Bracket Loosely attach the sill bracket to the support bracket using Support Bracket the carriage bolt and the lock nut. Carriage Lock nut Bolt... - Page 10 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. 6. Attach each Frame curtain the window sash by using screws (Type C). (See Fig. 7) Figure 7 7.
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Page 11: Operation
Operation Operation Function of Controls • Designed for COOLING ONLY. • Built-in adjustable Thermistor • Powerful and quiet cooling. • Washable one-touch filter • Slide-in and slide-out chassis for the simple instal- • Compact size lation and service. • Equipped with reliable and efficient rotary •... -
Page 12: Disassembly
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 13) 3. -
Page 13: 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 14: Electrical Parts
Disassembly 6. Shroud 1. Remove the fan. (Refer to section 5) 2. Remove the shroud. (See Figure 20) 3. Re-install the components by referring to the removal procedure, above. Figure 20 Electrical Parts 7. Overload Protector 1. Remove the cabinet. (Refer to section 2) 2. - Page 15 Disassembly 9. Capacitor 1. Remove the control box. (Refer to section 3) 2. Open the top cover from the control box. (See Figure 23) 3. Pull out the capacitor from the control box. 4. Disconnect all the leads of capacitor terminals. 5.
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Page 16: 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 25) 5. -
Page 17: 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 18 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 28B-Charging Figure 28A-Pulling Vacuum 18 Room Air Conditioner...
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Page 19: Schematic Diagram
Schematic Diagram Schematic Diagram Electronic Control Device Service Manual 19... -
Page 20: Wiring Diagram
Schematic Diagram Wiring Diagram CN-AC/DC CN-AC/DC CN-AC/DC CN-AC/DC CN-MOTOR CN-MOTOR GN/YL GN/YL MOTOR MOTOR DC PCB DC PCB ASSEMBLY ASSEMBLY CAPACITOR CAPACITOR CN-TH1 CN-TH1 POWER POWER TRANS TRANS THERMISTOR THERMISTOR CN-PWR CN-PWR SWITCH SWITCH DC12V DC12V FUSE CN-12V Ribbed FUSE CN-12V Ribbed 250V/T3.15A... -
Page 21: 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 ASSEMBLY:6871A20167 2. DISPLAY P.C.B. ASSEMBLY CN-AC/DC R01G R02G... -
Page 22: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL CAPILLARY TUBE MOTOR COMPRESSOR TURBO FAN EVAPORATOR COIL Figure 29 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 23: 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 24 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 25: 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 Fuse. • Check the wiring diagram. (208/230V for LWL1230WAL) • Check the wiring diagram. •... - Page 26 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 for of IC01M 0V? IC01M DC 12V? 3 minutes?
- Page 27 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 28 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 • Check the PCB pattern. Ass'y DC 5V? •...
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Page 29: Electric Parts
Troubleshooting Guide ElectrIc Parts Possible Trouble 1 The unit does not operate. Is the • Check the Fuse. Trans input power AC 115V? • Check the Fuse. • Check the wiring diagram. (208/230V for LWL1230WAL) • Check the wiring diagram. •... - Page 30 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 31 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 32 Troubleshooting Guide Possible Trouble 6 It displays abnormally on DC PCB Ass’y. • Replace IC01G, Are the IC01G and IC02G IC02G. good? • Connect connector Is the connection of to CN-AC/DC exactly. CN-AC/DC OK? Does IC03G • Replace IC03G. operate normally on AC PCB Ass'y? •...
- Page 33 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 34 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 35: Exploded View
Exploded View Exploded View 749740 559011 731273 148000 554031 149980 130910 346811 W48602 359012 749750 W48602 349480 349600 354210 267110 147582-1 147581 349001 147582-2 135312 554160 159830 130410 550140 249950 135314 352115-1 552102 W0CZZ 268711-2 268711-1 352115-2 352111 H EA D EF 264110 238310... -
Page 36: Replacement Parts List
R eplacement Parts List R eplacement Parts L is t P A R T N O . LO CATIO N D E S C R IP T IO N REM ARK LW HD1450ER LW HD1800R 130410 BASE ASSEMBLY, W ELD[SINGLE] 3041A20023T 3041A20067B 130910... - Page 37 R eplacement Parts List R eplacement Parts L is t P A R T N O . LO CATIO N D E S C R IP T IO N REM ARK L1804R BASE ASSEMBLY, W ELD[SINGLE] 130410 3041A20023T CABINET ASSEMBLY, SINGLE 3091AR6057V 130910 GRILLE ASSEMBLY, FRONT(SINGLE)
- Page 38 Memo 38 Room Air Conditioner...
- Page 39 January, 2006 P/No.: 3828A29003A Printed in China...