LG Electronics AS-W096URH0/UBH0/UWH0/UMH0 Outdoor Unit does not operate at all, Indoor Outdoor

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Troubleshooting Guide

Trouble 7

The Outdoor Unit does not operate at all.

Does the Operating LED of indoor unit blink when Operation's ON?

NO

Is the Connection between indoor power relay Pin ➂ and terminal block No. 1 right?

YES

Is the connection of cable between indoor and outdoor unit right?

YES

Is the voltage of Terminal Block , in outdoor Control Box about AC220V / 240V?

YES

Is the voltage of NF01J ➀, ➁ in outdoor PCB Ass'y about AC220V / 240V when Operation's ON?

YES

Is the Bridge Diode(BD01S) right?

YES

Refer to the self-diagnosis function.

NO

Check the connecting state of connector

NO

Indoor	Outdoor
1(Brown)	1(Brown)
2(Blue)	2(Blue)
3(Green/YL)	3(Green/YL)
4(Red)	4(Red)

NO

Check the Fuse of Outdoor PCB Ass'y.

NO

Check the PTC and RY-PWR.

NO

Check the Bring Diode.

NO

Replace the PCB Ass'y.

Service Manual 75

Image 75

Contents LG Room Air Conditioner Table of Contents LG Model Name 2002Code Type Code of Model Meaning Meaning 2003~2005Installation Safety PrecautionsThere is risk of fire, electric shock, explosion, or injury Thinner OperationBe cautious that water could not enter the product Keep level even when installing the productOperation 9k, 12k Btu Series DimensionsSymbols Used in this Manual Indoor UnitOutdoor Unit AS-W096U0 AS-W126U0 AS-W096U1 AS-W126U1 Product SpecificationsOutdoor unit InstallationSelect the best Location Indoor unitFixing Installation Plate Oil trap should be installed every 5~7 metersPiping Length and Elevation Flaring Work Drill a Hole in the WallFoamed polyethylene or equivalent is recom- mended Connecting the PipingCheck IndoorWrap the insulation material around the connecting portion For left rear piping Indoor unit installation Bad case For left piping. Follow the instruction below Good caseOutdoor unit OutdoorConnecting the Cables Circuit Grade Breaker Checking the Drainage To check the drainageDrain piping Forming the Piping Air Purging Air purgingAir purging with vacuum pump Soap water method EvacuationFinishing the job Evaluation of the performance Prepare remote controllerTest Running Settlement of outdoor unitPump Down Pump Down ProcedureFunctions Stand by control at low temp Power relay controlActive power filter controlPSC Overheatng. ProtectionPower moduleCooling Down to 18C Heating Down to 16C Up to 30C Cancel Sleep Mode, Timer on or Timer OFF3, 4, 5, 6 Off Timer High39C Low11COperation LED display of indoor unitLG Brand/OEM Brand Control method Protection of the evaporator pipe from frostingModel Comp. Operating frequency Cooling mode operationIntake air Temp Setting Temp Healthy Dehumidification mode operationHeating mode operation Operating freq. step of compTemp. differences Comp. Operating frequency At beginning Fuzzy mode operationOptionalsIntake air temp Setting temp Fan speed Fuzzy operation for coolingFuzzy operation for dehumidification Fuzzy operation for HeatingChaos swing mode Jet cool mode operationJet heat mode operation Swing modeSleep timer operation Sleep timer operation for cooling cycleSleep timer operation for heating cycle Trial Operation Indoor temp Operating Mode Setting tempAuto restarting operation Forced operationProtection from DC Peak Current Protection from total current controlPortection from overheating of compressor Portection from overheating of power moduleDefrosting control AS-W096/126U0 SeriesAS-W096/126U1 Series Auto Cleaning Auto ChangeoverOptionalLow Ambient To remove the Grille from the Chassis DisassemblyTo remove the Control Box To remove the Discharge GrilleTo remove the Evaporator To remove the Cross-Flow Fan To remove the Motor CoverSchematic Diagram Electric Control DeviceIndoorAS-W096U 0, AS-W126U 0 Series OutdoorAS-W096Series, AS-W126Series Indoor Unit AS-W096/126U0,1 Series Wiring DiagramAS-W126U0 Series Outdoor Unit AS-W096U0 SeriesComponents Location Indoor Main P.W.B Assembly DC PartDisplay ASSEMBLYAS-W096/126U0,1 Series Outdoor Main P.W.B Assembly AS-W096/126U0 Series Model Adopted Electrion Expansion Valve Troubleshooting GuideRefrigeration Cycle Diagram Model Capillary TubeOil trap should be installed per 5~7 meters Pipe Length and the ElevationOutdoor unit Indoor unit Way Valve Liquid Side Way, 3-way ValvePurge the air from the system ProcedureAir purging Check for gas leakagePumping Down Air purging of the charge hoseSet the 2-way valve to the closed position Air purging Re-installationMount the valve stem nuts and the service port nut Re-air PurgingGas leakage Balance Refrigerant of the 3-way ValveAll amount of refrigerant leaked EvacuationPurge the air from the charge hose Gas ChargingAfter Evacuation Connect the charge hose to the charging cylinderTrouble analysis Cycle PartsSelf-diagnosis function Diagnosis Procedure Precaution in Service or CheckElectronic Parts Procedure Specification RemedyProduct doesnt operate with the remote controller Check Point Comp. on Comp. OFF Compressor/Outdoor Fan are unable to driveWhen indoor Fan does not operate Trouble 5 When the horizontal louver does not operate Heater does not operate at all Indoor Outdoor Outdoor Unit does not operate at allDC Peak ErrorError Code ➅ Trouble 8-1When compressor does not operate normallyCommunication error between Indoor and Outdoor Error Code ➄ Trouble 8-2When compressor does not oprate normallyCT Error Error Code ➆ Trouble 8-3When compressor does not oprate normallyCN-T/Block Problem of missing the connector Indoor Main PCB AssyProblem of missing the connector Outdoor Main PCB Assy Connectors Condition Problem error modeIndoor Unit Exploded ViewOutdoor Unit Description Replacement Parts ListPanel ASSY, Front SUB No A20061Z October