Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Troubleshooting
Related Manuals for LG LWC121CGMK0
Summary of Contents for LG LWC121CGMK0
-
Page 1: Service Manual
LG Room Air Conditioner SERVICE MANUAL MODELS: LWC121CGMK0 LWC143CGMK0 LWC143CSMK0 LWC243NSAB1 LWC243NSMM1 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 ..............................7 Outside Dimensions ...........................7 Product Specifications ..........................11 Installation ..............................11 Select the Best Location .........................11 Installation Check .............................11 How to Secure the Drain Pipe ........................11 How to Install(Installation kit not included models)...................12 How to Install(Installation kit included models)..................13 When Using Installation Kits ........................13 Suggested Tool Requirements .........................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. WARNING This symbol indicates the possibility of death or serious injury. - Page 4 Safety Precautions Operational Plug in the power plug proper- Do not operate or stop the Do not damage or use an unit by inserting or pulling out unspecified power cord. the power plug. • Otherwise, it will cause electric • It will cause electric shock or fire •...
- Page 5 Safety Precautions Do not allow water to run into Leave the door closed while Ventilate before operating air electric parts. the air conditioner is running. conditioner when gas goes out. • It will cause failure of machine or • It is not designed to cool the entire •...
- Page 6 Safety Precautions Do not place heavy object on If water enters the product, turn Do not clean the air the power cord and take care off the the power switch of the conditioner with water. so that the cord should not be main body of appliance.
-
Page 7: 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 12K , 14K MODELS Dimension mm(inch) - Page 8 Dimensions Model 24K Btu Dimension mm(inch) 660(26") mm(inch) 428(16 ") mm(inch) 675(26 ") 8 Room Air Conditioner...
-
Page 9: Product Specifications
Specfications Product Specifications LWC143CGMK0 LWC121CGMK0 MODELS LWC143CSMK0 ITEMS 1Ø,115V,60Hz 1Ø,220V,60Hz POWER SUPPLY 12,000 14,000 COOLING CAPACITY (Btu/h) 1,220 1,400 INPUT RUNNING CURRENT E.E.R (BTU/W.h) 26.7(DB),19.4(WB) OPERATING INDOOR (°C) 35(DB),23.9(WB) CONDITION OUTDOOR (°C) 355g(12.5oz) 670g(23.6oz) REFRIGERANT (R-22) CHARGE 2 ROW 16STACKS... - Page 10 Specfications LWC243NAB1 LWC243NSMM1 MODELS ITEMS 1Ø,220V,60Hz POWER SUPPLY 24,000 COOLING CAPACITY (Btu/h) 2,820 INPUT 12.9 RUNNING CURRENT E.E.R (BTU/W.h) 26.7(DB),19.4(WB) OPERATING INDOOR (°C) 35(DB),23.9(WB) CONDITION OUTDOOR (°C) 985g(34.8oz) REFRIGERANT (R-22) CHARGE 3 ROW 15STACKS EVAPORATOR 2 ROW 19STACKS CONDENSER TURBO FAN, INDOOR PROPELLER TYPE FAN WITH SLINGER-RING FAN, OUTDOOR...
-
Page 11: 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 sunlight does not shine directly FENCE on the unit. AWNING 3.The outside of the cabinet must extend outward for at COOLED AIR least 12"... -
Page 12: How To Install(Installation Kit Not Included Models)
Installation How to Install (Models without Installation kit) • For MODELS : LWC121CGMK0 / LWC143CGMK0 Shipping screws 1. Remove the screws which fasten the cabinet at both sides and at the back. 2. Slide the unit from the cabinet by gripping the base pan handle and pulling forward while bracing the cabinet. -
Page 13: How To Install(Installation Kit Included Models)
Installation How to Install (Models with Installaion Kit ) When Using Gasket RIGHT SIDE HORIZONTAL LINE 1. WINDOW (WIDTH-A, HEIGHT-B) 4. DETAILS 5.1 x 30 ROUND HEAD WOOD SCREWS 2. GASKET 3. WALL 625mm 392mm 280mm 30mm 0~25mm OVER 420mm 5~10mm -5~5mm ") -
Page 14: Suggested Tool Requirements
Installation Suggested Tool Requirements SCREWDRIVER(+, -), RULER, KNIFE, HAMMER, PENCIL, LEVEL Shipping screws Preparation of Chassis 1. Remove the screws which fasten the cabinet at both sides and at the back. 2. Slide the unit out from the cabinet by gripping the base pan handle and pulling forward while bracing the cabinet. - Page 15 Installation 3. Loosely assemble the sill support using the parts INDOOR OUTDOOR Figure Sill Support Bolt Figure 4 4. Select the position that will place the sill support near the outer most point on sill (See Figure Frame Guide Screw(Type A) Be careful when you install the cabinet NOTICE (Frame Guides...
- Page 16 Installation 10. Slide the unit into the cabinet.(See Fig. 8) CAUTION: For security purpose, reinstall screws (Type A) at the cabinet's sides. Power cord Screw(Type A) Figure 8 Screw(Type A) 11. Cut the Foam-Strip to the proper length and insert between the upper and lower window sash.
-
Page 17: Operation
Operation Operation Features • Designed for COOLING ONLY. • Powerful and quiet cooling. • Built-in adjustable THERMOSTAT • Slide-in and slide-out chassis for the simple instal- • Washable one-touch filter lation and service. • Compact size • Side air-intake, side cooled-air discharge. •... - Page 18 Operation Power Temp Fan Speed Timer Mode Energy Saver 1. POWER BUTTON To turn the air conditioner ON, push the button. To turn the air conditioner OFF, push the button again. This button takes priority over any other buttons. 2. OPERATION MODE SELECTION BUTTON Everytime you push this button, it will toggle COOL, FAN and DRY.
- Page 19 Operation • For MODELS : LWC243NSMM1 1. POWER BUTTON Operation starts, when this button is pressed and stops when you press the button again. 2. AUTO SWING (Optional) The vertical louver swings horizontally by the automatic system and stops when you press the button again. 3.
-
Page 20: Disassembly
Disassembly Disassembly — Before disassembly, set the CONTROL BOX to OFF and disconnect the power cord. Mechanical Parts 1. Front Grille 1. Open the lnlet grille upward . 2. Remove the screw which fastens the front grille. 3. Pull the front grille from the right side. 4. -
Page 21: 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 which fasten the brace. 5. -
Page 22: Electrical Parts
Disassembly 6. Shroud 1. Remove the fan. (Refer to section 5) 2. Remove the screw that fastens the shroud. 3. Remove the shroud. (See Figure 21) 4. Re-install the component by referring to the removal procedure, above. Figure 21 Electrical Parts 7. -
Page 23: Rotary Switch
Disassembly 9. Capacitor 1. Remove the control box. (Refer to section 3) 2. Remove the knobs and the screw that fasten control panel from control box. 3. Remove the screw located in the front. 4. Open the bottom side of control box. 5. -
Page 24: Refrigerating Parts
Disassembly 13. Motor 1. Remove the cabinet. (Refer to section 2) 2. Remove the evaporator. (Refer to section 4) 3. Remove the orifice. (Refer to section 4) 4. Remove the blower. (Refer to section 4) 5. Remove the fan. (Refer to section 5) 6. -
Page 25: Capillary Tube
Disassembly 16. Capillary Tube 3. Remove the capillary tube. 1. Remove the cabinet. (Refer to section 2) 4. Re-install the component by referring to notes. 2. After discharging the refrigerant completely, unbraze the interconnecting tube at the capillary tube.(See caution above) NOTICE —... - Page 26 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 31B-Charging Figure 31A-Pulling Vacuum 26 Room Air Conditioner...
-
Page 27: Schematic Diagram
Schematic Diagram Schematic Diagram Electronic Control Device • 12K , 14K MODELS A : Heat Pump Only Service Manual 27... -
Page 28: Wiring Diagram
Schematic Diagram Wiring Diagram Mechanical Model : LWC243NSAB1 POWER INPUT BK(BR) WH(BL) (Plain) (Ribbed) SYNC. M. WIRING DIACRAM ROCKER SWITCH Micom Model : LWC121CGMK0 , LWC143CGMK0 LWC243NSMM1 LWC143CSMK0 POWER INPUT WH(BL) BK(BR) (Ribbed) (Plain) GN/YL(GN) THERMISTOR CN-TH1 MOTOR OR(BR) OR(BR) -
Page 29: Components Location
Schematic Diagram Components Location Main P.C.B Assembly Display P.C.B Assembly Service Manual 29... -
Page 30: 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 31: 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 32 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 33: 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 none. Power supply cord Check voltage to rotary switch and control box. If none, check power supply cord. - Page 34 Troubleshooting Guide COMPLAINT REMEDY CAUSE Compressor will not run, Check the TEMP control. If not at the lowest num- Thermistor but fan motor runs. ber, 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 35: Exploded View
Exploded View Exploded View Indoor Unit • 12K , 14K MODELS 147582 552101 249950 266003 269310 W0CZZ 137215 266002 135500 149410 237200 264110 Service Manual 35... - Page 36 Exploded View • MODEL: 24K MODELS 130910 148000 559010 352390 W48602 149980 346811 359012 349480 349600 554031 147582 130410 W48602 349001 354210 249950 554160 W0CZZ 269310 249950 261704 237200 263230 268712 W0CZZ 137215 266003 135500 266002 135500 135510 146812 264110 238310 268714 146812...
-
Page 37: Replacement Parts List
Replacement Parts List Replacement Parts List PART NO. LOCATION DESCRIPTION REMARK LWC143CSMK0 LWC143CGMK0 LWC121CGMK0 130410 BASE ASSEMBLY,SINGLE 3041AR1524F 3041AR1524F 3041A20012R 130910 CABINET ASSEMBLY,SINGLE 3091AR2286G 3091A10032X 3091AR2286Z 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A20009U 3531A20009Q 3531A20009Q 135313 GRILLE,INLET 3530A10069A 135500 COVER,CONTROL(INDOOR) 3550AR7032A 3550AR7032A 3550AR7032A... -
Page 38: 38 Room Air Conditioner
Replacement Parts List PART NO. LOCATION DESCRIPTION REMARK LWC243NSMM1 LWC243NSAB1 559010 FAN ASSEMBLY,AXIAL 5900AR1330B 5900AR1330B 554160 COMPRESSOR SET 2520UHFK2CA 2520UHFK2CA 554031 CONDENSER ASSEMBLY,BENT 5403A20032H 5403A20032H 552111 TUBE,CAPILLARY BEND 5211A30296E 5211A30296E 552101 TUBE,CAPILLARY 5425AR3147X 359012 FAN ASSEMBLY,TURBO 5901A20009A 5901A20009A 354210 EVAPORATOR ASSEMBLY,FIRST 5421A20017N 5421A20017N 352390... - Page 39 Memo Service Manual 39...
- Page 40 July, 2004 P/No.: 3828A30032P Printed in Korea...