website http://www.lgservice.com LG LG Room Air Conditioner SERVICE MANUAL MODEL: WG1805RY6,RAD-183A WG2405RY6,RAD-243A CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions..........................................................................................................................................3 Dimensions .....................................................................................................................................................5 Symbols Used in this Manual ..................................................................................................................
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. CAUTION This symbol indicates the possibility of injury or damage to property only. ■ Meanings of symbols used in this manual are as shown below.
Safety Precautions Do not modify or extend the power cord. • There is risk or fire or electric shock. Do not install, remove, or re-install the unit by yourself. • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpacking and installing the product. • Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator. Do not store or use flammable gas or combustibles near the air conditioner.
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. NOTICE This symbol indicates special notes.
Specfications Product Specifications Table -1 MODELS ITEMS WG2405RY7 WG1805RY6 POWER SUPPLY 1Ø, 208/230V, 60Hz COOLING CAPACITY 17,500/18,000 23,500/23,800 INPUT 1,800/1,850 2,760/2,800 9.7 8.5 RUNNING CURRENT REFRIGERANT (R-22) CHARGE(g) OPERATING TEMPERATURE 720g(25.4oz) 830g(29.
Specfications Product Specifications Table -1 MODELS ITEMS POWER SUPPLY RAD-183A 1Ø, 208/230V, 60Hz COOLING CAPACITY 17,500/18,000 INPUT 1,800/1,850 RUNNING CURRENT 9.7 REFRIGERANT (R-22) CHARGE(g) 720g(25.
Specfications Product Specifications Table -1 MODELS ITEMS POWER SUPPLY RAD-243A 1Ø, 208/230V, 60Hz COOLING CAPACITY 23,500/23,000 INPUT 2,760/2,710 RUNNING CURRENT 8.5 REFRIGERANT (R-22) CHARGE(g) 835g(29.
Installation Installation Select the Best Location CAUTION: All side louvers of the cabinet must remain exposed to the outside of the structure. AWNING COOLED AIR 75~15cm 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 on the unit. 3.
Installation Window Requirements NOTICE All supporting parts should be secured to firm wood, masonry, or metal. 26" to 41" 1. This unit is designed for installation in standard double hung windows with actual opening widths from 26" to 41". The top and bottom window sashes must open sufficiently to allow a clear vertical opening of 18" from the bottom of the upper sash to the window stool. 2. The stool offset (height between the stool and sill) must be less than 1 1/4".
Installation Suggested Tool Requirements PREPARATION OF CHASSIS Shipping screws 1. Remove the screws which fasten the cabinet at both sides and at the back. Figure 2 2. Slide the unit out from the cabinet by gripping the base pan handle and pulling forward while bracing the cabinet. 3. Cut the window sash seal to the proper length. Peel off the backing and attach the Foam-PE to the underside of the window sash. Figure 3 4.
Installation Cabinet Installation 1. Open the window. Mark a line on the center of the window stool between the side window stop moldings. Loosely attach the sill bracket to the support bracket using the carriage bolt and the lock nut. Sill Bracket Support Bracket Lock nut Carriage Bolt (M-Screw) Figure 6 2. Attach the sill bracket to the window sill using the screws (Type B).
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. Screw(Type C) 6. Attach each Frame curtain the window sash by using screws (Type C.) (See Fig. 11) Figure 11 7. Slide the unit into the cabinet.(See Fig. 12) CAUTION: For security purpose, reinstall screws(Type A) at cabinet's sides. Power Cord Screw Screw (Type A) Figure 12 8.
Operation Operation Features • Designed for COOLING ONLY. • Powerful and whispering cooling. • Slide-in and slide-out chassis for the simple installation and service. • Side air-intake, side cooled-air discharge. • Built-in adjustable THERMOSTAT • Washable one-touch filter • Compact size • Reliable and efficient rotary compressor Control Locations Function of Controls 1. Cooling Only Model • VENTILATION The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions.
Operation 2. Cooling Only Model with Remote Control and Touch Type DISPLAY REMOTE CONTROL WG2405RY6, WG2405RY6 WG2405RY6 WG2405RY6 3 2 Power 1 8 Temp 5 6 1 Fan Speed 4 Timer Mode Energy Saver Auto Swing 2 3 4 5 7 6 7 PRECAUTION: The Remote Control unit will not function properly if bright light strikes the sensor window of the air conditioner or if there are obstacles between the Remote Control unit and the air conditioner.
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 upward . 2. Remove the screw that fastens the front grille. 3. Pull the front grille from the right side. 4. Remove the front grille. 5. Re-install the component by referring to the removal procedure, above.(See Figure 17) NOTICE Mark " "of inlet grille means opening d irection. 2. Cabinet 1.
Disassembly Air Handling Parts 4. Cover (at the top) 1. Remove the front grille. (Refer to section 17) 2. Remove the cabinet. (Refer to section 18) 3. Remove 11 screws which fasten the brace and covers. 4. Remove the covers and the brace. (See Fig. 20) 5. Re-install the components by referring to the removal procedure, above. Figure 20 5. Blower 1. Remove the cover. (Refer to section 20) 2. Remove the 3 screws which fasten the evaporator at the left side and the top side. 3.
Disassembly 6. Shroud 1. Remove the fan. (Refer to section 21) 2. Remove the screw that fastens the shroud. 3. Remove the shroud. (See Figure 24) 4. Re-install the component by referring to the removal procedure, above. Figure 24 Electrical Parts 7. Motor 1. Remove the cabinet. (Refer to section 18) 2. Remove the cover control and disconnect a wire housing in control box. (Refer to section 19) 3. Remove the blower. (Refer to section 21) 4. Remove the fan. (Refer to section 22) 5.
Disassembly 9. Capacitor 1. Remove the control box. (Refer to section 19) 2. Remove the knobs and the screw that fasten control panel from control box. 3. Remove the screw that located in the front. 4. Open the bottom side of control box. 5. Remove the screw and the clamp that fastens the capacitor. 6. Disconnect all the leads of capacitor terminals. 7. Re-install the components by referring to the removal procedure, above. (See Figure 27) Figure 27 10. Power Cord 1. Remove the control box.
Disassembly Refrigerating Cycle CAUTION: Discharge the refrigerant system using a FreonTM Recovery System. If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the FreonTM. Leave the valve in place after servicing the system. 13. Condenser 1. Remove the cabinet. (Refer to section 18) 2. Remove the 4 screws that fasten the brace.(Refer to section 20) 3. Remove the 5 screws that fasten the condenser and shroud. 4.
Disassembly NOTICE — Replacement of the refrigeration cycle. 1. When replacing the refrigeration cycle, be sure to Discharge the refrigerant system using a FreonTM recovery System. If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the FreonTM. Leave the valve in place after servicing the system. 2. After discharging the unit completely, remove the desired component, and unbraze the pinch-off tubes. 3.
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.
MAIN POWER FAN COMP HERM C CAPACITOR FAN MOTOR S/V4WAY SYNC MOTOR PIPE-TH ROOM-TH 1 3 1 1 3 1 CN-BK CN-BL CN-RD CN-4WAY 250V/T3.15A FUSE G4A-1A-E-LG RY-COMP 12V CN-SYNC CN-WOR 3 2 4 3 4 3 1 2 1 2 SMW250-04 CN-TH1 R01J TVR14271 ZNR01J 120 1/2W 0.
Schematic Diagram Wiring Diagram • MODEL : WG1805RY6 / WG2405RY6 POWER INPUT WH(BL) BK(BR) (Plain) GN/YL(GN) BK BL RD OR(BR) YL RD H PTC COMP. BK RD BL R S C BL 3854AR2330P WIRING DIAGRAM 23 Room Air Conditioner BR BR RY-SYNC ZNR RY-COMP 4 3 OLP CN-DISP RY-HI RY-MID CN-SYNC OR(BR) BK RD MAIN P.W.B ASM C BK CN-WORK GN/YL (GN) CAPACITOR F THERMISTOR CN-TH1 RY-LO MOTOR BK BL RD OR(BR) YL DISPLAY P.W.
Schematic Diagram Components Location Main P.W.B Assembly Display P.W.
Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL FAN CAPILLARY TUBE MOTOR COMPRESSOR BLOWER EVAPORATOR COIL Figure 34 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.
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. Ineffective Cooling Check cold air circulation for smooth flow. Check outdoor coil (heat exchanger) & the fan operation. Dirty indoor coil (Heat exchanger) Check gas leakage.
Troubleshooting Guide Fails to Start Check of power source. Check circuit breaker and fuse. Check of control switch setting. Gas leakage of feeler bulb of thermostat Check of control switch. Compressor only fails to start. Fan only fails to start. Improper wiring. Drop of power voltage. Improper thermostat setting. Defect of fan motor capacitor. Defect of compressor capacitor. Loose terminal connection. Capacitor check. Irregular motor resistance ( ). Irregular motor insulation ( ).
Troubleshooting Guide Electrical Parts Troubleshooting Guide Possible Trouble 1 The unit does not operate. Is the Trans output power AC 220V? NO • Check the Fuse. • Check the wiring diagram. YES Is the Trans output power about AC 14V? NO YES Is output Voltage of IC01D DC 12V? Is shorted the Trans. output? YES NO NO • Check the Main PCB pattern. • Exchange the Trans. • Exchange D02D~D05D. • Exchange IC01D. YES Is output Voltage of IC02D DC 5V? NO • Exchange IC02D.
Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is setting Temp. set lower than Room Temp.-0.5°C? NO • Select the setting Temp. to lower Number. YES Is the voltage No.10 of IC01M 0V? NO Is the voltage N0.7 of IC01M DC 5V? YES YES • Check the RY-COMP. • Check the wiring Diagram. • Exchange IC01M. NO Is the Unit for 3 minutes delay? NO YES • Wait 3 Minutes. • Exchange MAIN PCB Ass'y. Possible Trouble 3 The compressor always operate.
Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.1 or 4 of IC01M DC 5V? NO • Exchange IC01M. YES Is the voltage NO.13 or 16 of IC01M 0V? NO • Exchange IC01M. YES • Check the RY-Hi or RY-Lo. • Check the wiring diagram. Possible Trouble 5 Auto Swing does not operate. Is the voltage NO.6 of IC01M DC 5V? NO • Exchange Micom. YES Is the voltage NO.11 of IC01M 0V? NO • Exchange IC01M. YES • Check the RY-SYNC. • Check the connectionn of CN-SYNC.
Troubleshooting Guide Possible Trouble 6 Remote controller does not operate. Is the voltage of Battery about over 2.3V? NO • Exchange the battery. YES Is the voltage No.16 of CN-DISP on Main PCB Ass'y DC 5V? NO • Check the PCB pattern. YES NO Is the connection of CN-DISP all right? • Connect connector to CN-DISP exactly. YES • Exchange Receiver Ass'y. Possible Trouble 7 It displays abnormally on display PCB Ass'y. Is the IC01G all right? NO • Exchange IC01G.
Troubleshooting Guide Room Air Conditioner Voltage Limits NAME PLATE RATING 208~230±10% 115±10% COMPLAINT Fan motor will not run. MINIMUM 187V 104V CAUSE MAXIMUM 253V 126V REMEDY No power Check voltage at outlet. Correct if necessary. Power supply cord Check voltage to rotary switch. If none, check power supply cord. Replace cord if circuit is open. Rotary switch Check switch continuity. Refer to wiring diagram for terminal identification. Replace switch if defective.
Troubleshooting Guide COMPLAINT Compressor will not run, but fan motor runs. Compressor cycles on overload. Compressor cycles on overload. Compressor cycles on overload. Insufficient cooling or heating Excessive noise CAUSE REMEDY Thermostat Check the position of knob If not at the coldest setting, advance the knob to this setting and restart unit. Check continuity of the thermostat. Replace thermostat if circuit is open. Thermistor Check the TEMP control.
Troubleshooting Guide COMPLAINT Compressor cycles on overload. Insufficient cooling or heating Excessive noise. CAUSE Capacitor Wiring Refrigerating system Air filter Exhaust damper door Unit undersized Turbo or fan Copper tubing Auto air-swing fails. Rotary switch. Wiring Synchronous motor. REMEDY Test capacitor. Check the terminals. If loose, repair or replace. Check the system for a restriction. If restricted, clean of replace. Close if open.
Exploded View Exploded View Cooling Model 135500 554030 554031 148000 130910 W48602 559011 149980 352380 349600 130410 346811 135515 554160 359012 354210 550140 349480 147582 W48602 W52106-1 W52106-2 349001 552111 352115 352113 352111 135312 35211A 159830 249950 135314 269300 W0CZZ 137215 266002 147581-2 146812 266003 149410 147581-1 264100 Room Air Conditioner 135510
Exploded View Exploded View Cooling Model 135500 554030 554031 148000 130910 W48602 559011 149980 352380 349600 130410 346811 135515 554160 359012 354210 550140 349480 W52106-2 147582 W48602 W52106-1 349001 552111 267110 352113 352111 249950 135312 567480 35211A W0CZZ 159830 268711-1 135314 237200 238310 135510 146812 147581-2 268711-2 147581-1 Room Air Conditioner 264110
Replacement Parts List R: Service Parts LOCATION NO. DESCRIPTION PART NO. WG1805RY6 REMARK 130410 BASE ASSEMBLY,SINGLE 3041A30001H R 130910 CABINET ASSEMBLY,SINGLE 3091AR6056P R 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A11002B R 135303 GRILLE,INLET 3530A10189A R 135500 COVER ASSEMBLY,CONTROL(SINGLE) 3551A30015A R 146812 MOTOR ASSEMBLY,SYNC.
LOCATION No.
Replacement Parts List PART NO LOCATION NO DESCRIPTION 130410 130910 135312 135303 135500 146812 147581-1 147581-2 147582 148000 149980 152302 237200 238310 249950 263230 264110 267110 BASE ASSEMBLY,SINGLE CABINET ASSY,SINGLE GRILLE ASSY,FRONT(SINGLE) GRILLE ASSY,INLET COVER,CONTROL(INDOOR) MOTOR ASSEMBLY,SYNC LOUVER,HORIZONTAL LOUVER,HORIZONTAL LOUVER,VERTICAL BRACE SHROUD FILTER ASSY,A/C PANEL,CONTROL ESCUTCHEON CONTROL BOX ASSEMBLY,SINGLE THERMISTOR ASSEMBLY POWER CORD ASSEMBLY REMOTE CONTROLLER 304
LOCATION No.
P/No.