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LG Room
Air Conditioner
SERVICE MANUAL
MODEL: TWC051HGAA2.AWYBLAT (W051CA)
TWC052HGAA0.AWYBLCP (LA050MG)
TWC061HGAA2.AWYBLAT (W061CA)
TWC062HGAA0.AWYBLCP (LA060MG1)
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 TWC051HGAA2.AWYBLAT (W051CA)
Summary of Contents for LG TWC051HGAA2.AWYBLAT (W051CA)
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Page 1: Service Manual
LG Room Air Conditioner SERVICE MANUAL MODEL: TWC051HGAA2.AWYBLAT (W051CA) TWC052HGAA0.AWYBLCP (LA050MG) TWC061HGAA2.AWYBLAT (W061CA) TWC062HGAA0.AWYBLCP (LA060MG1) 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 How to Install..............................7 Operation ................................8 Features ..............................8 Insulation Resistance Test..........................8 About the Controls on the Air conditioner ....................8 Disassembly ..............................9 Mechanical Parts............................9 Air Handling Parts ............................10... -
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. • 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 Operation High High Cool... -
Page 6: Product Specifications
Product Specifications Product Specifications 1. SPECIFICATIONS MODELS W051CA W061CA LA050MG LA060MG1 ITEMS POWER SUPPLY 1ø, 115V~, 60Hz 1ø, 230V~, 60Hz COOLING CAPACITY 5050 Btu/h 6000 Btu/h 5500KJ/H 6000KJ/H INPUT RUNNING CURRENT E.E.R (BTU/W.h) 9.7BTU/W.h 9.7BTU/W.h 10.6KJ/H-W 10.8KJ/H-W INDOOR (°C) 27(DB)* 19(WB)** OPERATING OUTDOOR (°C) -
Page 7: Installation
Installation Installation This air conditioner is designed with a button-down chassis so it can be easily installed in a window. Select the Best Location 1. To prevent vibration and noise, make sure the unit is installed securely and firmly. INSIDE OUTSIDE 2. -
Page 8: Operation
Operation Operation Feature • DESIGNED FOR COOLING ONLY • POWERFUL AND INCREDIBLE COOLING • TOP-DOWN CHASSIS FOR THE SIMPLE INSTALLATION AND SERVICE • BUILT-IN ADJUSTABLE THERMOSTAT • WASHABLE ONE-TOUCH FILTER • COMPACT SIZE Insulation Resistance Test INSULATION RESISTANCE TEST 1. Unplug the power cord and connect a jumper between 2 pins (black and white). 2. -
Page 9: Disassembly
Disassembly Disassembly Mechanical Parts 1. FRONT GRILLE 1. Disconnect the unit from source of power. 2. Remove the two knobs by pulling them off. Using a screwdriver, remove the screw that secures the front grille to control board. (See Figure 13) 3. -
Page 10: Air Handling Parts
Disassembly Air Handling Parts 4. AIR GUIDE UPPER 1. Disconnect the unit from the power source. 2. Remove the front grille. (Refer to Section 1) 3. Remove the cabinet. (Refer to Section 2) 4. Remove the control board. (Refer to Section 3) 5. -
Page 11: Electrical Parts
Disassembly 6. MOTOR 1. Disconnect the unit from the power source. 2. Remove the front grille. (Refer to Section 1) 3. Remove the cabinet. (Refer to Section 2) 4. Remove the control board. (Refer to Section 3) 5. Remove the air guide upper. (Refer to Section 4) 6. -
Page 12: Refrigerating Cycle
Disassembly 10. CAPACITOR 1. Remove the cabinet. (Refer to Section 2) Figure 26 2. Remove the control board. (Refer to Section 3) 3. Discharge the capacitor by placing a 20 K resistor across the capacitor terminals. 4. Remove the screw which fastens the capacitor clamp. 5. - Page 13 Disassembly 15. EVAPORATOR slowly with the two full turns 1. Remove the cabinet. (Refer to Section 2) counter-clockwise. This will keep oil 2. Discharge the refrigerant by using a refrigerant from foaming and being drawn into recovery system. the vacuum pump. 3.
- Page 14 Disassembly Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment, pinch-off tool capable of making a vapor proof seal, leak detector, tubing cutter, hand tools to remove components and service valve. COMPOUND GAUGE MANIFOLD GAUGE CONDENSER SEE INSETS (HIGH PRESSURE SIDE) BELOW COMPRESSOR EVAPORATOR...
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Page 15: Schematic Diagram
Schematic Diagram Schematic Diagram Wiring Diagram • MODEL: W051CA LA050MG W061CA LA060MG1 REF. NO DESCRIPTION & NAME Q'TY POWER CORD ASSY FAN MOTOR COMPRESSOR ROTARY SWITCH THERMOSTAT CAPACITOR OVERLOAD PROTECTOR Service Manual 15... -
Page 16: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COILS MOTOR CAPILLARY TUBE TURBO FAN EVAPORATOR COILS Following is a brief description of the important components and their function in what is called the refrigeration system. Reference should be made to Figure 33 to follow the refrigerating cycle and the flow of the refrigerant in the cooling cycle. -
Page 17: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused by an electrical defect. The other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit is running but cooling is ineffective. - Page 18 Troubleshooting Guide Fails to Start Check of circuit breaker Check of power source. and fuse. Check of control switch Gas leakage of feeler setting. bulb of thermostat. Check control switch. Compressor fails only to Fan only fails to start. start. Improper wiring.
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Page 19: Room Air Conditioner Voltage Limits
Troubleshooting Guide Room Air Conditioner Voltage Limits NAME PLATE RATING MINIMUM MAXIMUM 115V ± 10% 103.5V 126.5V W051CA W061CA 230V ± 10% 207V 253V LA050MG LA060MG1 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. - Page 20 Troubleshooting Guide COMPLAINT CAUSE REMEDY Fan motor noise. If cracked, out of balance, or partially missing, replace it. Blower If cracked, out of balance, or partially missing, replace it. Loose set screw Tighten it. Worn bearings If knocking sounds continue when running or loose, replace the motor.
- Page 21 Troubleshooting Guide COMPLAINT CAUSE REMEDY Compressor cycles on Fan motor If not running, determine the cause. Replace if overload. required. Condenser air flow Remove the cabinet, inspect the interior surface restriction of the condenser. If restricted, clean carefully with a vacuum cleaner (do not damage fins) or brush.
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Page 22: Exploded View
Exploded View Exploded View W48602 559011 130910 554030 149980 349480 135312 147581 352390-1 359012 149410 346811 147582-2 W48602 135313 352390-2 354210 130410 152302 264110 266003 352111 352115 269310 567502 352113 135500 554160 35211A 550140 249950 W0CZZ 22 Room Air Conditioner... -
Page 23: Replacement Parts List
Replacement Parts List Replacement Parts List PART NO(2007) LOCATION NO. DESCRIPTION REMARK W051CA SH2 130410 Base Assembly,Single 3041A30001F 550140 Damper 4H02023A 349600 Bracket,Motor 4960AR1596A 346811 Motor,AC 4681A20081R 359012 Fan,Turbo 5900A20027A 149980 Shroud 4998AR1597B 559011 Fan Assembly,Axial 5900AR1508B W48602 Clamp,Spring 3H02932C 349480 Orifice 4948A20016A... - Page 24 Replacement Parts List L L O O C C A A T T I I O O N N P P / / N N O O D D E E S S C C R R I I P P T T I I O O N N N N O O .
- Page 25 April, 2005 P/No.:3828A28007D Printed in China...