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LG LAN181CNW, LAU181CNW, LA180CPI, LA180CPO Service Manual
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LG LAN181CNW, LAU181CNW, LA180CPI, LA180CPO Service Manual

LG LAN181CNW, LAU181CNW, LA180CPI, LA180CPO Service Manual

Lg room air conditioner service manual
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LG
Room Air Conditioner

SERVICE MANUAL

MODELS: LAN181CNW(ASNC183VML3)
LAU181CNW(ASUC183VML3)
LA180CPI (ASNC183VML3)
LA180CPO (ASUC183VML3)
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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Summary of Contents for LG LAN181CNW, LAU181CNW, LA180CPI, LA180CPO

  • Page 1: Service Manual

    Room Air Conditioner SERVICE MANUAL MODELS: LAN181CNW(ASNC183VML3) LAU181CNW(ASUC183VML3) LA180CPI (ASNC183VML3) LA180CPO (ASUC183VML3) website http://www.lgservice.com 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 Details of 2006 LG Model Name... 3 Safety Precautions... 4 Functions ... 10 Product References ... 12 Dimensions... 13 Refrigeration Cycle Diagram... 15 Wiring Diagram... 16 Operation Details ... 17 Display Function ... 23 Self-diagnosis Function ...23...

  • Page 3: Details Of 2006 Lg Model Name

    Details of 2006 LG Model Name Code Type Producing Center/ Refrigerant Type of Air conditioner Cooling/Heating Capacity(Btu/h) Electric Range Chassis Color Function Serial No. Code of Model Meaning L: ChangWon R22, A: ChangWon R410A, C: ChangWon R407C S: Split Type Air conditioner...

  • Page 4: Safety Precautions

    Install the panel and the cover of control box securely. • There is risk of fire or electric shock. 4 Room Air Conditioner Be sure not to do. Be sure to follow the instruction. For electrical work, contact the dealer, seller, a qualified electri- cian, or an Authorized Service Center.
  • Page 5 Be cautious when unpacking and installing the product. • Shape edges could cause injury. Be especially careful of the sharp edges. Be sure the installation area does not deteriorate with age. • If the base collapses, the air con- ditioner could fall with it, causing property damage, product failure, and personal injury.
  • Page 6 • There is risk of property damage, failure of product, or electric shock. 6 Room Air Conditioner Do not let the air conditioner run for a long time when the humidi- ty is very high and a door or a window is left open.
  • Page 7 • There is risk of electric shock. Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in. • There are sharp and moving parts that could cause personal injury.
  • Page 8 • There is risk of fire, electric shock or damage to the plastic parts of the product. Always insert the filter securely. Clean the filter every two weeks or more often if necessary. • A dirty filter reduces the efficien- cy of the air conditioner and...
  • Page 9 Do not drink the water drained from the unit. • It is not sanitary and could cause serious health issues. Disuse Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire. • They may burn or explode. Use a firm stool or ladder when cleaning or maintaining the air conditioner.

  • Page 10: Functions

    Airflow Direction Control • The louver can be set at the desired position or swing up and down automatically. 10 Room Air Conditioner : Lights up during the system operation. : Lights up during Sleep Mode Auto operation. : Lights up during Timer operation.

  • Page 11: Remote Control

    Remote Control Operation ON/OFF Operation Mode Selection Cooling Operation Mode.( (Cooling (Heating Healthy Dehumidification Operation Mode.( model only) model only) Fan Speed Selection (Low) Room, Temperature Checking : (Low:11°C Temperature Setting HIGH TEMPERATURE Cooling JET COOL Setting the Time or Timer Timer Selection : OFF, ON, OFF Timer Setting...

  • Page 12: Product References

    Net Weight Indoor Outdoor Gross Weight Indoor Outdoor NOTE: Please refer to Label Quality on the product since this specification may be changed for improving performance 12 Room Air Conditioner Unit LA*181CNW(AS-C183VML3)/LA180CP* (AS-C183VML3) ø, V, Hz BTU/h /min(cfm) l/h(pts/hr) dB(A)±3 dB(A)±3...

  • Page 13: Dimensions

    Dimensions Indoor Unit Pipe Hole MODEL Unit mm(inch) mm(inch) mm(inch) Indoor Unit 928(36.5) 522(20.6) 147(5.8) Fix Hole Service Manual 13...
  • Page 14 Outdoor Unit MODEL mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) 14 Room Air Conditioner OUTDOOR UNIT 870(34.3) 655(25.8) 320(12.6) 370(14.6) 25(1.0) 630(24.8) 25(1.0) 546(21.5) 162(6.4) 162(6.4) 54(2.1) 74.5(2.9) 79(3.1) Gas side 3-way valve Liquid side...

  • Page 15: Refrigeration Cycle Diagram

    Refrigeration Cycle Diagram Cooling Only Models INDOOR UNIT HEAT EXCHANGER (EVAPORATOR) Pipe size(Diameter:ø) MODEL 1/2" (Cooling Only) For installation over rated, *a proper quantity of refrigerant should be added for each meter. a proper quantity of refrigerant LIQUID SIDE CAPILLARY TUBE GAS SIDE Piping length Liquid...

  • Page 16: Wiring Diagram

    Wiring Diagram Wiring Diagram Indoor Unit 18K (Cooling Only Models) Outdoor Unit 16 Room Air Conditioner...

  • Page 17: Operation Details

    Operation Details MAIN UNIT FUNCTION • DISPLAY 1) C/O Model Operation Indicator • ON while in appliance operation, OFF while in appliance pause. • Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on) Sleep Timer Indicator •...

  • Page 18: Defrost Control

    • When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of the defrost conditions above. • While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off. 18 Room Air Conditioner Setting Temp+0.5°C Setting Temp-0.5°C Setting Temp.
  • Page 19 Fuzzy Operation (C/O Model) • According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on. Compressor ON Temp Compressor OFF Temp •...
  • Page 20 • The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached. • If the appliance is operating at the time set by the timer, the operation continues. 20 Room Air Conditioner Setting Temp + 0.5°C Setting Temp+0.5°C...

  • Page 21: Sleep Timer Operation

    Off-Timer Operation • When the set time is reached after the time is input by the remote control, the appliance stops operating. • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. •...

  • Page 22: Forced Operation

    • When a key is input by the remote control while the slide switch on the main unit of the appliance is on the forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received. 22 Room Air Conditioner Heat pump Model Healthy Dehumidification...

  • Page 23: Display Function

    Display Function 1. Heating Model Operation Indicator • Cooling, Soft Dry, Fan, Heating Sleep Timer Indicator • Sleep Mode Timer Indicator • Timer Mode Defrost Indicator • Hot-start, Defrost Self-diagnosis Function Error Error Display LED Code (Indoor body operation LED) (once) 3sec 2.

  • Page 24: Introduction

    This symbol indicates special notes. NOTICE Features Air Inlet Front Panel Air Discharge Air Intake Vents Air Outlet Vents Base Plate 24 Room Air Conditioner NEO Plasma Filter Air Filter Signal Receptor Power Cord Piping Connecting Wires Drain Hose...

  • Page 25: Installation

    Installation Read carefully, and then follow step by step. Installation Parts Installation plate Type "B" screw Installation Tools Figure Measuring tape, Knife Hole core drill Torque wrench Type "A" screw and plastic anchor Name Figure Screw driver Electric drill Spanner Remote control holder Name Ohmmeter...
  • Page 26 Installation Map Installation parts you should purchase. NOTICE More than 19.6"(50cm) (Left and right are identical) More than 28"(70cm) 26 Room Air Conditioner More than 3.9"(10cm) Saddle More than 24"(60cm) More than 12"(30cm) More than More than 12"(30cm) 12"(30cm) Sleeve...
  • Page 27 Confirm The Refrigerant 1. Check the quality label on the indoor and outdoor unit. 2. Make certain that the refrigerant is R-410A. NOTICE THIS PRODUCT CONTAINS R-410A REFRIGERANT 1) Different compressor oil - R-410A(Polyol ester) / R-22(Mineral). - Do not mix the existing mineral oil. - Do not apply used pipe, tools and gauges covered with the existing mineral oil.
  • Page 28 70cm(27.5") of space. Do not place animals and plants in the path of the warm air. Take the air conditioner weight into account and select a place where noise and vibration are mini- mum. Select a place so that the warm air and noise from the air conditioner do not disturb neighbors.
  • Page 29 3) Preparing work for Installation 1. Open panel front First,Pull the grille bottom, then remove screws(2 pieces), and close grille bottom again. The moment of lifting the both lower parts of panel front, you can hear sound this panel came out, In this time panel front is separated After pull down this panel a bit, and separate con- necting wire with product.
  • Page 30 60mm (2.4") Ø 70mm (2.8") 30 Room Air Conditioner 5) Preparing work for installation 1. Drill a hole in the wall • Drill the piping hole with a ø50mm hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.
  • Page 31 Flaring Work and Connection of Piping 1) Flaring work Main cause for refrigerant leakage is due to defect in the flaring work. Carry out correct flaring work using the following procedure. 1. Cut the pipes and the cable. • Use the piping kit accessory or pipes purchased locally. •...
  • Page 32 Indoor unit tubing Flare nut • Tighten the flare nut with a wrench. Open-end wrench (fixed) Flare nut Wrench Indoor unit tubing 32 Room Air Conditioner Ø6.35 Ø9.52 Ø12.7 Ø15.88 Ø19.05 • When extending the drain hose at the indoor unit, install the drain pipe.
  • Page 33 CAUTION Installation Information (For right piping) • Good case For right piping. Follow the instruction below. Press on the upper side of clamp and unfold the tubing to downward slowly. • Bad case Following bending type from left to right could cause problem of pipe damage.
  • Page 34 Power Supply AWG(MIN.) Model Power source ⓐ 1ø, 208/230V 34 Room Air Conditioner Wiring Diagram Indoor Unit Terminal L1 is neutral for 115V models. 2. Separately wire the high and low voltage line. 3. Use heat-proof electrical wiring capable of withstanding temperatures up to 167 F.
  • Page 35 2) Connection method of the connecting cable(Example) (1) Dismount two-caps on the conduit panel. (2) Make a hole appropriate for the passage of connection cable through on cap by tool. (for low voltage line) (3) Pass the connecting cable through the hole. (4) Properly connect the cable on the terminal block.
  • Page 36 After the confirmation of the above conditions, prepare the wiring as follows: 1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring, be guided by the circuit diagram posted on the inside of control cover.
  • Page 37 Checking the Drainage and forming the pipings 1) Checking the drainage 1. To check the drainage. Pour a glass of water on the evaporator. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.
  • Page 38 Wrong wiring can cause the unit to misoperate to result in a fire hazard. • Check local electrical codes and any specified wiring instructions or limitations. 38 Room Air Conditioner CAUTION CAUTION Circuit Breaker Use a circuit breaker or time delay fuse.
  • Page 39 Air Purging 1) Air purging Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. • Pressure in the system rises. • Operating current rises. • Cooling(or heating) efficiency drops. • Moisture in the refrigerant circuit may freeze and block capillary tubing.
  • Page 40 • Replace the valve caps at both gas and liquid side service valves and fasten them tight. This completes air purging with a vacuum pump. The air conditioner is now ready to test run. 40 Room Air Conditioner 3-way valve...
  • Page 41 Panel Front Assembly 1. First, Check the side cover assembly exactly, Fix power cord in the bottom groove of cover side left. 2. Assemble connecting lead wire with controller and first fix the upper part of panel front, then match the lower part of panel front 3.
  • Page 42 Refrigerant R-410A NOTE: If the actual pressure is higher than shown, the The air conditioner is now ready for use. This is performed when the unit is to be relocated or the refrigerant circuit is serviced. Pump Down means collecting all refrigerant in the outdoor unit without loss in refrigerant gas.

  • Page 43: Operation

    Operation Remote Control Operations The controls will look like the following. Signal transmitter CANCEL AUTO CLEAN Operation Mode Cooling Operation Auto Operation or Auto Changeover Healthy Dehumidification Operation Heating Operation • Cooling Model( ), Heat Pump Model( 1. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again.

  • Page 44: Disassembly Of The Parts (Indoor Unit)

    PWB. - Pull the cover control out from the control box and disconnect other wires. - Remove securing screws. - Pull the control box out from the chassis carefully. 44 Room Air Conditioner Panel Front Connector CN-DC/DC CN-UD...
  • Page 45 3. To remove the Evaporator. - Remove 1 screws securing the evaporator. - Pull the evaporator out from the chassis carefully. 4. Before removing the Turbo Fan. - Remove the securing screws from the chassis. - Pull the pipe cover, top cover and the air guide. 5.

  • Page 46: 2-Way, 3-Way Valve

    Pumping down (Transfering) Evacuation (Servicing) Gas charging (Servicing) Pressure check (Servicing) Gas releasing (Servicing) 46 Room Air Conditioner 2-way Valve (Liquid Side) Hexagonal wrench (4mm) Open position Closed position To outdoor unit Shaft position Closed (with valve cap) Open (counter-clockwise)

  • Page 47: Air Purging

    1. Air purging Required tools : hexagonal wrench, adjustable wrench, torque wrenches, wrench to hold the joints, and gas leak detec- tor. The additional gas for air purging has been charged in the outdoor unit. However, if the flare connections have not be done correctly and there gas leaks, a gas cylinder and the charge set will be needed.

  • Page 48: Pumping Down

    Gas side Closed 3-Way valve CLOSE (6) Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg/cm (7) Immediately set the 3-way valve to the closed position. – Do this quickly so that the gauge ends up indi-...
  • Page 49 1) Re-air purging (Re-installation) Indoor unit Gas cylinder OPEN • Procedure (1) Confirm that both the 2-way valve and the 3- way valve are set to the closed position. (2) Connect the charge set and a gas cylinder to the service port of the 3-way valve. –...
  • Page 50 0 kg/cm – If there is no air in the refrigerant cycle (the pressure when the air conditioner is not run- ning is higher than 1 kg/cm refrigerant until the gauge indicates 0.5 to 1 kg/cm sary to apply a evacuatin.
  • Page 51 3. Evacuation (All amount of refrigerant leaked) Indoor unit Vacuum pump OPEN • Procedure (1) Connect the vacuum pump to the charge set’s center hose (2) Evacuation for approximately one hour. – Confirm that the gauge needle has moved toward -76 cmHg (vacuum of 4 mmHg or less). (3) Close the valve (Lo side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approxima-...

  • Page 52: Gas Charging

    (approximately 150g each time) while operating the air conditioner in the cooling cycle; however, one time is not suffi- cient, wait approximately 1 minute and then repeat the procedure (pumping down-pin).
  • Page 53 Additional gas charging (Gas leakage) • When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal oper- ating suction pressure. • Use the graph or the equation below to get operating suction pressure according to indoor and out- door temperature.

  • Page 54: Cycle Troubleshooting Guide

    Notice: 1. The suction pressure is usually 8.5~9.5 kg/cm 2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with put- 54 Room Air Conditioner Temp. difference :approx. 0°F Current :less than 80% of rated current Temp.
  • Page 55 2. Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Does "beeping" sound is made from the Indoor Unit? Check the voltage of power(About AC 208V/AC230V, 60Hz) • Main power's voltage • Voltage applied to the unit •...
  • Page 56 Check the connecting circuit between the remote controller MICOM (No. ) - R17(2 ) - IR LED - Q1 - R16(2.2K ). 56 Room Air Conditioner Turn on Main Power Caused by other parts except the remote controller Check the contact of CN-D1/D2 connector.
  • Page 57 4. Compressor/Outdoor Fan are unable to drive. Operate "Cooling Mode( remote controller is less than one of the indoor temperature by 2°F at least. When in Fan Mode, Compressor/Outdoor Fan is stopped. Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).

  • Page 58: When Indoor Fan Does Not Operate

    Indoor Fan may be stopped in the Soft Dry Mode(change to the Cooling Operation Mode). Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F. (At that times, Defrost indicator is turned on) 58 Room Air Conditioner Check connecting condition of the CN-MOTOR CON- NECTOR Check the interference of Indoor Fan.
  • Page 59 6. When Vertical Louver does not operate. • Confirm that the Vertical Louver is normally geared with the shaft of Step- ping Motor. • If the regular torque is detected when rotating the Vertical Louver with hands Normal • Check the connecting condition of CN-U/D, CN-L/R Connector •...
  • Page 60 Caution: If the connecting wires of Indoor and Outdoor unit are not connected within 2 minutes after the power of Outdoor unit is applied, a communication error will occur. Therefore, the power should be applied after connecting them. 60 Room Air Conditioner...

  • Page 61: Indoor Unit

    8. The phenomena in case of connecting error INDOOR UNIT Connector Type CN-DC/DC Open and connecting error Blue Black Brown CN-MOTOR CN-UD Short between terminals CN-D1/D2 CN-TH Short between terminals Short between terminals Condition • The same as the phenomenon of Outdoor Unit. •...

  • Page 62: Outdoor Unit

    Black Brown Connecting error Connecting error Connecting error Connecting error 62 Room Air Conditioner Condition • All functions stop. • The operation with the remote controller, forced and OPEN test one do not operate. • PWB pattern is damaged when applying the power.
  • Page 63 Cycle Troubleshooting Guide 9. Voltage of Connectors according to Indoor Fan Speed Service Manual 63...

  • Page 64: Electronic Control Device

    Electronic Control Device MAIN PWB ASSY(Indoor Unit) • TOP VIEW • BOTTOM VIEW • PWB ASSY SVC PART LIST MODEL 18K Cooling Model OJ1H, OJ2H, : SHORT 64 Room Air Conditioner P/No. OR1H OR2H 6871A20387J OPTIONAL FUNCTION OR3H OR4H OR5H...
  • Page 65 Electronic Control Device MAIN PWB ASSY(Outdoor Unit) • TOP VIEW • BOTTOM VIEW...
  • Page 66 Electronic Control Device DISPLAY PWB ASSEMBLY • TOP VIEW • BOTTOM VIEW 66 Room Air Conditioner...

  • Page 67: Schematic Diagram

    Schematic Diagram Indoor Unit OR RD BL PK YL AVdd1 AVss OR YL YL PK BL YL OR RD Service Manual 67...
  • Page 68 Schematic Diagram Outdoor Unit 68 Room Air Conditioner...

  • Page 69: Exploded View And Replacement Parts List

    Exploded View and Replacement Parts List Exploded View and Replacement Parts List Indoor Unit 352380-2 249951 352380-1 146811 147581 135311-2 268711-2 131410 135500-2 146811 147581 349490 346810-2 359012-2 346810-1 147581 135500-1 146811 359012-1 135311-3 135311-1 330870 135500-3 567480 267110 354210 159830 268711-1 352115...

  • Page 70: 70 Room Air Conditioner

    359012-1 FAN,TURBO 359012-2 FAN,TURBO 135313 GRILLE ASSEMBLY, INLET NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request. (GCSC WEBSITE http://biz.LGservice.com) 70 Room Air Conditioner PART No. LAN181CNW(ASNC183VML3) LA180CPF(ASNC183UML3) 3141A20008J 3531A20124K 3531A20124J 3531A20125G 3531A10334J 3550A20512B...
  • Page 71 Exploded View and Replacement Parts List 2. Outdoor unit(18K) Service Manual 71...
  • Page 72 BARRIER ASSEMBLY OUTDOOR 263230-1 THERMISTOR ASSEMBLY 263230-2 THERMISTOR ASSEMBLY NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request. (GCSC WEBSITE http://biz.LGservice.com) 72 Room Air Conditioner PART No. LAU181CNW(ASUC183VML3) LA180CPO(ASUC183VML3) 2H02479B 5220A20006A 5403A20058B 2520UGJK2AA 2520UGAK2AA...
  • Page 73 P/No.: 3828A20065Y Printed in Korea...

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