LG Electronics AS-W126URH1/UBH1/UWH1/UMH1 service manual When indoor Fan does not operate

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Troubleshooting Guide

Trouble 4	When indoor Fan does not operate.

		Turn off main power.

Check the connection of CN-MOTOR.

Check the Fan Motor.

Check the Fuse(AC250V, T2A).

Check the related circuit of indoor Fan Motor.

•The pin No.45 of micom and the part for driving SSR.

•Check the related pattern.

•Check the SSR.

-SSR Open: Indoor Fan Motor never operate.

-SSR short: Indoor Fan Motor always operates in case of ON or OFF.

Turn on the main power

Check the SSR high speed operation by remote control.

(the Indoor Fan Motor is connected)

The voltage of Pin No 1(orange) and 3(black) of CN-MOTOR.

About AC 180V over

About AC 50V over

SSR is not damaged

Check SSR

72Room Air Conditioner

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Contents LG Room Air Conditioner Table of Contents LG Model Name 2002Code Type Code of Model Meaning 2003~2005 MeaningSafety Precautions InstallationThere is risk of fire, electric shock, explosion, or injury Operation ThinnerKeep level even when installing the product Be cautious that water could not enter the productOperation Dimensions Symbols Used in this ManualIndoor Unit 9k, 12k Btu SeriesOutdoor Unit Product Specifications AS-W096U0 AS-W126U0 AS-W096U1 AS-W126U1Installation Select the best LocationIndoor unit Outdoor unitFixing Installation Plate Oil trap should be installed every 5~7 metersPiping Length and Elevation Drill a Hole in the Wall Flaring WorkConnecting the Piping CheckIndoor Foamed polyethylene or equivalent is recom- mendedWrap the insulation material around the connecting portion For left rear piping Indoor unit installation For left piping. Follow the instruction below Good case Bad caseOutdoor Outdoor unitConnecting 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 Prepare remote controller Test RunningSettlement of outdoor unit Evaluation of the performancePump Down Procedure Pump DownFunctions Power relay control Active power filter controlPSCOverheatng. ProtectionPower module Stand by control at low tempCancel Sleep Mode, Timer on or Timer OFF 3, 4, 5, 6 Off TimerHigh39C Low11C Cooling Down to 18C Heating Down to 16C Up to 30COperation LED display of indoor unitLG Brand/OEM Brand Protection of the evaporator pipe from frosting Control methodCooling mode operation Model Comp. Operating frequencyHealthy Dehumidification mode operation Intake air Temp Setting TempHeating mode operation Operating freq. step of compTemp. differences Comp. Operating frequency Fuzzy mode operationOptionals Intake air temp Setting temp Fan speedFuzzy operation for cooling At beginningFuzzy operation for Heating Fuzzy operation for dehumidificationJet cool mode operation Jet heat mode operationSwing mode Chaos swing modeSleep timer operation Sleep timer operation for cooling cycleSleep timer operation for heating cycle Indoor temp Operating Mode Setting temp Auto restarting operationForced operation Trial OperationProtection from total current control Protection from DC Peak CurrentPortection from overheating of power module Portection from overheating of compressorDefrosting control AS-W096/126U0 SeriesAS-W096/126U1 Series Auto Cleaning Auto ChangeoverOptionalLow Ambient Disassembly To remove the Grille from the ChassisTo remove the Control Box To remove the Discharge GrilleTo remove the Evaporator To remove the Motor Cover To remove the Cross-Flow FanSchematic Diagram Electric Control DeviceIndoorAS-W096U 0, AS-W126U 0 Series OutdoorAS-W096Series, AS-W126Series Wiring Diagram Indoor Unit AS-W096/126U0,1 SeriesOutdoor Unit AS-W096U0 Series AS-W126U0 SeriesIndoor Main P.W.B Assembly DC Part Components LocationDisplay ASSEMBLYAS-W096/126U0,1 Series Outdoor Main P.W.B Assembly AS-W096/126U0 Series Troubleshooting Guide Refrigeration Cycle DiagramModel Capillary Tube Model Adopted Electrion Expansion ValveOil trap should be installed per 5~7 meters Pipe Length and the ElevationOutdoor unit Indoor unit Way, 3-way Valve Way Valve Liquid SideProcedure Air purgingCheck for gas leakage Purge the air from the systemPumping Down Air purging of the charge hoseSet the 2-way valve to the closed position Re-installation Mount the valve stem nuts and the service port nutRe-air Purging Air purgingBalance Refrigerant of the 3-way Valve Gas leakageEvacuation All amount of refrigerant leakedGas Charging After EvacuationConnect the charge hose to the charging cylinder Purge the air from the charge hoseCycle Parts Trouble analysisSelf-diagnosis function Precaution in Service or Check Diagnosis ProcedureProcedure Specification Remedy Electronic PartsProduct doesnt operate with the remote controller Compressor/Outdoor Fan are unable to drive Check Point Comp. on Comp. OFFWhen indoor Fan does not operate Trouble 5 When the horizontal louver does not operate Heater does not operate at all Outdoor Unit does not operate at all Indoor OutdoorTrouble 8-1When compressor does not operate normally DC Peak ErrorError Code ➅Trouble 8-2When compressor does not oprate normally Communication error between Indoor and Outdoor Error Code ➄Trouble 8-3When compressor does not oprate normally CT Error Error Code ➆Problem of missing the connector Indoor Main PCB Assy Problem of missing the connector Outdoor Main PCB AssyConnectors Condition Problem error mode CN-T/BlockExploded View Indoor UnitOutdoor Unit Replacement Parts List DescriptionPanel ASSY, Front SUB No A20061Z October