Lg LA121HPMI User Manual

LG Room Air ConditionerSERVICE MANUALLGMODELS: LAN121CNM (ASNC121ERH0)LAU121CNM (ASUC121EUH0)LA121HPMI (ASNH121ERH0)LA121HPMO (ASUH121EUH0)LAN121HNM (

10 Room Air ConditionerDimensionsOutdoor Unit1. 12kWL2L3L1DHL4L5Gas side(3-way valve)Liquid side(2-way valve)MODEL12kDIM unitW mm(inch) 770(30.3)H mm(

Service Manual 11Introduction IntroductionThis symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that may cause har

12 Room Air ConditionerInstallationFigure FigureNameScrew driverElectric DrillMeasuring Tape, KnifeHole Core DrillSpannerTorque wrenchOhmmeterHexagona

Service Manual 13InstallationInstallation MapInstallation parts you should purchase. Vinyl tape (Wide)• Apply after carrying out a drainage test.•

14 Room Air Conditioner1. Check the quality label on the indoor and outdoor unit.2. Make certain that the refrigerant is R-410A.THIS PRODUCT CONTAINS

Service Manual 15Outdoor unit1. If an awning is built over the unit to preventdirect sunlight or rain exposure, make sure thatheat radiation from the

16 Room Air ConditionerPiping Length and Elevation12k Ø12.7(1/2") Ø6.35(1/4") 7.5(25) 7.5(25) 15(49) 20(0.22)Pipe SizeCapacity(Btu/h)Suction

Service Manual 17The wall you select should be strong and solid enoughto prevent vibration1. Mount the installation plate on the wall with type "

18 Room Air ConditionerFlaring WorkCut the pipes and the cable.1. Use the piping kit accessory or the pipes purchasedlocally.2. Measure the distance b

Service Manual 19Indoor1. Prepare the indoor unit's piping and drain hose for installation through the wall.2. Remove the plastic tubing retaine

2 Room Air ConditionerAir Conditioner Service ManualTABLE OF CONTENTSSafety Precautions...

20 Room Air ConditionerWrap the insulation material around theconnecting portion.• Overlap the connection pipe insulation materialand the indoor unit

Service Manual 21Insert the connecting cable into the indoorunit.• Don't connect the cable to the indoor unit.• Make a small loop with the cable

22 Room Air ConditionerReroute the pipings and the drain hoseacross the back of the chassis.Reroute the pipings and the drain hoseacross the back of t

Service Manual 23Installation Information. For left piping. Follow the instruction below.Correct case• Press on the upper side of clamp and unfold th

24 Room Air ConditionerPut a couple drops of refrigerant oil onthe face of the flare before assemblingtaking care not to add any contaminants.Align th

Service Manual 25Connection of The Cable1Indoor Unit Outdoor Unit234123456GTobranchcircuitGroundPower supplyaL1*L2Connecting cable(Low voltage)bT

26 Room Air ConditionerAfter the confirmation of the above conditions, prepare the wiring as follows:1) Never fail to have an individual power circuit

Service Manual 27Checking The Drainage• Pour a glass of water on the drain pan.• Ensure the water flows through the drain hose of the indoor unit wit

28 Room Air ConditionerForming The PipingForm the piping by wrapping the connect-ing portion of the indoor unit with insula-tion material and secure i

Service Manual 29Air PurgingAir purging With Vacuum PumpLo HiIndoor unitOutdoor unitManifold valveCharge hoseNitrogen gascylinder(in verticalstanding

Service Manual 3Safety Precautions Safety PrecautionsTo prevent injury to the user or other people and property damage, the following instructions m

30 Room Air ConditionerEvacuation• Connect the charge hose end described in thepreceding steps to the vacuum pump to evacuatethe tubing and indoor uni

Service Manual 31Charging Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft)line set. Any time a li

32 Room Air ConditionerOutside ambient TEMP. The pressure of the gas side service valve95°F(35°C)8.5~9.5kg/cm2 G(120~135 P.S.I.G.)Settlement of outdoo

Service Manual 33Operation Function of ControlsOperation • DISPLAY1) C/O Model Operation Indicator• ON while in appliance operation, OFF while in app

34 Room Air ConditionerOperation • While in compressor off, the indoor fan repeats low airflow speed and pause.• While the intake air temp is between

Service Manual 35Operation Airflow Speed Selection• The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input o

36 Room Air ConditionerOperation Forced operation • Operation procedures when the remote control can't be used.• The operation will be started

Service Manual 37Self-diagnosis FunctionOperation Display Function 1. Heating Model 2. Cooling Model• Cooling, Soft Dry, Fan, Heating • Cooling, So

38 Room Air ConditionerRemote Control OperationsOperation The controls will look like the following.1. START/STOP BUTTONOperation starts when this but

Service Manual 39Disassembly DisassemblyIndoor UnitDisconnect the unit from power supply before mak-ing any checks.Be sure the power switch is set to

4 Room Air ConditionerSafety Precautions OperationBe cautious when unpackingand installing the product.• Shape edges could cause injury.Be especia

40 Room Air ConditionerDisassembly2. To remove the Control Box.• Remove securing screws. • Pull the control box out from the chassis carefully.3. To r

Service Manual 41Disassembly• Unhook the tab on the right inside of the chassisat the same time, slightly pull the evaporatortoward you until the tab

42 Room Air ConditionerTroubleshooting Guide Troubleshooting Guide INDOOR UNIT OUTDOOR UNITINDOOR UNIT OUTDOOR UNITHEATEXCHANGE(EVAPORATOR)HEATEXCHANG

Service Manual 43Troubleshooting Guide 2-way, 3-way Valve 2-way Valve (Liquid Side) 3-way Valve (Gas Side)Shaft position Shaft position Service port

44 Room Air ConditionerTroubleshooting Guide • Procedure (1) Confirm that both the 2-way and 3-wayvalves are set to the open position. – Remove the

Service Manual 45Troubleshooting Guide Balance Refrigerant of the 3-way Valve (Gas leakage)• Procedure (1) Confirm that both the 2-way and 3-wayvalv

46 Room Air ConditionerTroubleshooting Guide Evacuation (All amount of refrigerant leaked)• Procedure (1) Connect the vacuum pump to the centerhose of

Service Manual 47Troubleshooting Guide Gas Charging (After Evacuation)• Procedure (1) Connect the charge hose to the chargingcylinder. – Connect the

48 Room Air ConditionerTroubleshooting Guide Additional gas charging(Gas leakage)• When refrigerant is insufficient by leakage, recharge the unit with

Service Manual 49Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp.

Service Manual 5Safety Precautions Do not place a heater or otherappliances near the powercable.• There is risk of fire, failure of theproduct, and/

50 Room Air ConditionerTroubleshooting Guide Electronic PartsProduct does not operate at all.(* Refer to Electronic Control Device drawing and Schemat

Service Manual 51Troubleshooting Guide The product is not operate with the remote controller.Turn on Main PowerWhile the compressor has been stopped,

52 Room Air ConditionerTroubleshooting Guide Compressor/Outdoor Fan are unable to drive.Turn on Main PowerOperate "Cooling Mode( )" by s

Service Manual 53Troubleshooting Guide When indoor Fan does not operate.Check connecting condition of the CN-MOTOR CON-NECTORDoes the voltage of term

54 Room Air ConditionerTroubleshooting Guide When Vertical Louver does not operate.• Confirm that the Vertical Louver is normally geared with the shaf

Service Manual 55Troubleshooting Guide • The operation indicator of Indoor unit blinks five times.• The red indicator of Outdoor unit blinks five tim

56 Room Air ConditionerTroubleshooting Guide The phenomena in case of connecting errorINDOOR UNITConnector TypeConditionOpen and connecting errorOpenO

Service Manual 57OUTDOOR UNITConnector TypeConditionOPEN• PWB pattern is damaged when applying the power.Connecting reverselyConnecting reverselyOPEN

58 Room Air ConditionerSchematic DiagramSchematic DiagramElectric Control Device Indoor

Service Manual 59Schematic Diagram Outdoor (12k)

6 Room Air ConditionerSafety Precautions Ventilate the product from timeto time when operating it togeth-er with a stove, etc.• There is risk of fir

60 Room Air ConditionerSchematic DiagramWiring Diagram Indoor Unit Models: 12k

Service Manual 61 Outdoor Unit Models: 12k(C/O)Models: 12k(H/P)Schematic Diagram

62 Room Air ConditionerSchematic DiagramComponents Location IndoorMAIN P.W.B ASSEMBLY• TOP VIEW• BOTTOM VIEW

Service Manual 63 Outdoor(12k)• TOP VIEW• BOTTOM VIEWSchematic Diagram

64 Room Air ConditionerDISPLAY ASSEMBLYSchematic DiagramLCD MODULE– 6871A00087B– 6306A90009A – 6306A90009C111111111111111111CN_LIMIT2CN_RECEIVER_1CN_F

Service Manual 65Product Specifications Product Specifications Power Supply Ø, V, HzCooling Capacity BTU/hInput WRunning Current ACOMP. Locked Rotor

Items Unit66 Room Air ConditionerProduct Specifications Cooling & HeatingPower Supply ø, V, HzCooling Capacity BTU/hHeating Capacity BTU/hInput Co

Service Manual 67Exploded View 152302137211135316263040146811-2268711-4342800359011131410 733010135311147581146811-1346810135516249951268711-3268711-

68 Room Air ConditionerExploded View Outdoor Unit: 12k Btu/h Seriess550140554160567502552113437211435301447910559010546810549610554031430410552203-155

Service Manual 69Replacement Parts ListReplacement Parts ListParts List (Indoor)LOCATIONDESCRIPTIONPART No.REMARKSNo.131410 CHASSIS ASSEMBLY 3141A200

Service Manual 7 OperationSafety Precautions Do not install the product wherethe noise or hot air from the out-door unit could damage theneighborho

70 Room Air ConditionerReplacement Parts ListParts List (Outdoor)LOCATIONDESCRIPTIONPART No.REMARKSNo.430410 BASE ASSEMBLY,OUTDOOR 3041A20008K 3041A20

P/No.: MFL31443001Printed in Korea

8 Room Air ConditionerDimensionsDo not recharge or disassemble the batteries. Donot dispose of batteries in a fire.• They may burn or explode.If the l

Service Manual 9DimensionsDimensionsInstallation plateDHWIndoor UnitThis symbol alerts you to the risk of electric shock. This symbol alerts you to h