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LG Room
Air Conditioner
SERVICE MANUAL
MODEL:
LW1815HR,LW2415HR
website http://www.lgservice.com
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
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Table of Contents
Troubleshooting
Related Manuals for LG LW1815HR
Summary of Contents for LG LW1815HR
- Page 1 LG Room Air Conditioner SERVICE MANUAL MODEL: LW1815HR,LW2415HR CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
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Page 2: Table Of Contents
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions............................3 Dimensions..............................5 Product Specifications ...........................6 Installation ...............................8 How to Install the Unit ..........................8 How to use the Reversible Inlet grille ......................8 Window Requirements ..........................9 Installation Kits Contents (some models including installation kit) ............10 Suggested tool Requirements........................10 Cabinet Installation...........................11 Operation ...............................13... -
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 Model LWHD1800HR LWHD2400HR Dimension... -
Page 6: Product Specifications
Specfications Product Specifications LG Model UWX183NGMMB UWX243NGMM8 PERFORMANCE BTU performance (Cooling) 17,500/18,000 22,500/23,000 BTU performance (Heating) 9,800/12,000 9,400/11,600 11.2/11.2 9.8/9.8 CEER 11.1/11.1 9.8/9.8 Dehumid. ( Pts/Hr) Dry Air Flow (CFM) dBA Level (Indoor / Outdoor) 61/66 64/69 Est. Cooling Area (SQ.FT) -
Page 7: Installation
Installation INSTALLATION How to Install the unit 1. To avoid vibration and noise, make sure the unit is 1/4 Bubble 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. -
Page 8: Window Requirements
Installation Window Requirements All supporting parts should be secured to firm wood, masonry, or metal. NOTICE • WINDOW REQUIREMENTS 1. This unit is designed for installation in standard double hung windows with actual opening widths from 29" to 41". The top and bottom window sashes must open sufficiently to allow a clear vertical opening of 18" from the bot- tom of the upper sash to the window stool. -
Page 9: Suggested Tool Requirements
Installation 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. 2. -
Page 10: Cabinet Installation
Installation Cabinet Installation 1. Open the window. Mark a line on the center of the win- Sill dow stool between the side window stop moldings. Bracket Support Loosely attach the sill bracket to the support bracket Bracket Carriage using the carriage bolt and the lock nut. Lock nut Bolt (M-Screw) - Page 11 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. 10) Figure 10 7.
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Page 12: Operation
Installation Operation • VENTILATION The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions. When a fresh air is necessary in the room, set the ven- tilation lever to the OPEN position. The damper is opened and room air is exhausted. CLOSE VENT OPEN... -
Page 13: Disassembly Instructions
Disassembly Disassembly - Before the following disassembly, power switch is set to off and disconnected the power cord. Mechanical parts 1. Front grille 1. Open the inlet grille upward or downward. 2. Remove the screw which fastens the front grille. 3. -
Page 14: Air Handling Parts
Disassembly Air handling parts 4. Cover (at the top) 1. Remove the front grille. (Refer to section 1) 2. Remove the cabinet. (Refer to section 2) 3. Remove 11 screws which fasten the brace and covers. 4. Remove the covers and the brace. (See Fig. 19) 5. -
Page 15: Electrical Parts
Disassembly 6. Fan 1. Remove the cabinet. (Refer to section 2) 2. Remove the brace and shroud cover. (Refer to section 4) 3. Remove the side cover with 2 screws.(See Fig. 23) 4. Remove the 5 or 6 screws which fasten the condenser. 5. - Page 16 Disassembly 10. CAPACITOR 1. Remove the control box. (Refer to section 3) 2. Remove the screw and knobs which fasten the display panel. 3. Disconnect the 2 leads from the rocker switch and remove the panel. 4. Remove a screw and unfold the control box. (See Fig.
- Page 17 Disassembly 13. SYNCHRONOUS MOTOR 1. Remove the control box. (Refer to section 3) 2. Unfold the control box. (Refer to section 10) 3. Remove the crankshaft. 4. Disconnect all the leads of the synchronous motor. 5. Remove the 2 screws which fasten the synchronous motor.
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Page 18: Refrigeration Cycle
Disassembly Refrigeration cycle CAUTION: Discharge the refrigerant system using 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. 16. - Page 19 NOTICE - Replacement of the refrigeration cycle. 1. When replacing the refrigeration cycle, be sure to discharge the refrigerant system using a Freon recovery System. 6. Recharge as follows : If there is no valve to attach the recovery system, 1) Refrigeration cycle systems are charged from the install one (such as a WATCO A-1) before venting High-side.
- Page 20 Disassembly Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable of making a leak-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. Figure 31B-Charging Figure 31A-Pulling Vacuum 21 Room Air Conditioner...
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Page 21: Schematic Diagram
Schematic Diagram Schematic Diagram Wiring Diagram ELECTRIC HEATING MODEL Service Manual 22... -
Page 22: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL CAPILLARY TUBE MOTOR COMPRESSOR BLOWER EVAPORATOR COIL Figure 32 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: Room Air Conditioner Voltage Limits
Troubleshooting Guide Room Air Conditioner Voltage Limits NAME PLATE RATING MINIMUM MAXIMUM 208~230±10% 187V 253V 115±10% 104V 126V COMPLAINT CAUSE REMEDY Fan motor will not run. No power Check voltage at outlet. Correct if necessary. Power supply cord Check voltage to rotary switch. If none, check power supply cord. - Page 26 Troubleshooting Guide COMPLAINT CAUSE REMEDY Thermostat Compressor will not run, Check the position of knob If not at the coldest set- but fan motor runs. ting, advance the knob to this setting and restart unit. Check continuity of the thermostat. Replace ther- mostat if circuit is open.
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Page 27: Exploded View
Exploded View Exploded View 554030 130910 148000 W48602 352390 559011 130410 749740 346811 731273 349600 359012 354210 554160 349001 W48602 147582 550140 249950 135312 264110 135301 567480 W52106 352113 W4430 W0CZZ 159830 552111 352111 135303 268711-1 137215 35211A 238310 146812 753010 268711-2 135500... -
Page 28: Replacement Parts List
March, 2007 P/No.: 3828A20841B Printed in China...