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LG Electronics AS-W126URH0/UBH0/UWH0/UMH0/UCH0 service manual LG Room Air Conditioner

Models: AS-W096URH1/UBH1/UWH1/UMH1 AS-W126URH1/UBH1/UWH1/UMH1 AS-W096URH0/UBH0/UWH0/UMH0 AS-W126URH0/UBH0/UWH0/UMH0/UCH0

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LG

LG Room

Air Conditioner

SERVICE MANUAL

MODELS: AS-W096URH0/UBH0/UWH0/UMH0

AS-W126URH0/UBH0/UWH0/UMH0/UCH0

AS-W096URH1/UBH1/UWH1/UMH1

AS-W126URH1/UBH1/UWH1/UMH1

CAUTION

•BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

•ONLY FOR AUTHORIZED SERVICE PERSONNEL.

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LG Electronics AS-W126URH0/UBH0/UWH0/UMH0/UCH0, AS-W126URH1/UBH1/UWH1/UMH1 service manual LG Room Air Conditioner

Contents

LG Room Air Conditioner Table of Contents 2002 LG Model NameCode Type Code of Model Meaning Meaning 2003~2005 Installation Safety Precautions There is risk of fire, electric shock, explosion, or injury Thinner Operation Be cautious that water could not enter the product Keep level even when installing the product Operation Symbols Used in this Manual DimensionsIndoor Unit 9k, 12k Btu Series Outdoor Unit AS-W096U0 AS-W126U0 AS-W096U1 AS-W126U1 Product Specifications Select the best Location InstallationIndoor unit Outdoor unit Oil trap should be installed every 5~7 meters Fixing Installation PlatePiping Length and Elevation Flaring Work Drill a Hole in the Wall Check Connecting the PipingIndoor Foamed polyethylene or equivalent is recom- mended Wrap the insulation material around the connecting portion For left rear piping Indoor unit installation Bad case For left piping. Follow the instruction below Good case Outdoor unit Outdoor Connecting the Cables Circuit Grade Breaker To check the drainage Checking the DrainageDrain piping Forming the Piping Air purging Air PurgingAir purging with vacuum pump Evacuation Soap water methodFinishing the job Test Running Prepare remote controllerSettlement of outdoor unit Evaluation of the performance Pump Down Pump Down Procedure Functions Active power filter controlPSC Power relay controlOverheatng. ProtectionPower module Stand by control at low temp 3, 4, 5, 6 Off Timer Cancel Sleep Mode, Timer on or Timer OFFHigh39C Low11C Cooling Down to 18C Heating Down to 16C Up to 30C LED display of indoor unit OperationLG Brand/OEM Brand Control method Protection of the evaporator pipe from frosting Model Comp. Operating frequency Cooling mode operation Intake air Temp Setting Temp Healthy Dehumidification mode operation Operating freq. step of comp Heating mode operationTemp. differences Comp. Operating frequency Intake air temp Setting temp Fan speed Fuzzy mode operationOptionalsFuzzy operation for cooling At beginning Fuzzy operation for dehumidification Fuzzy operation for Heating Jet heat mode operation Jet cool mode operationSwing mode Chaos swing mode Sleep timer operation for cooling cycle Sleep timer operationSleep timer operation for heating cycle Auto restarting operation Indoor temp Operating Mode Setting tempForced operation Trial Operation Protection from DC Peak Current Protection from total current control Portection from overheating of compressor Portection from overheating of power module AS-W096/126U0 Series Defrosting controlAS-W096/126U1 Series Auto ChangeoverOptional Auto CleaningLow Ambient To remove the Grille from the Chassis Disassembly To remove the Discharge Grille To remove the Control BoxTo remove the Evaporator To remove the Cross-Flow Fan To remove the Motor Cover Electric Control Device Schematic DiagramIndoorAS-W096U 0, AS-W126U 0 Series OutdoorAS-W096Series, AS-W126Series Indoor Unit AS-W096/126U0,1 Series Wiring Diagram AS-W126U0 Series Outdoor Unit AS-W096U0 Series Components Location Indoor Main P.W.B Assembly DC Part Display ASSEMBLYAS-W096/126U0,1 Series Outdoor Main P.W.B Assembly AS-W096/126U0 Series Refrigeration Cycle Diagram Troubleshooting GuideModel Capillary Tube Model Adopted Electrion Expansion Valve Pipe Length and the Elevation Oil trap should be installed per 5~7 metersOutdoor unit Indoor unit Way Valve Liquid Side Way, 3-way Valve Air purging ProcedureCheck for gas leakage Purge the air from the system Air purging of the charge hose Pumping DownSet the 2-way valve to the closed position Mount the valve stem nuts and the service port nut Re-installationRe-air Purging Air purging Gas leakage Balance Refrigerant of the 3-way Valve All amount of refrigerant leaked Evacuation After Evacuation Gas ChargingConnect the charge hose to the charging cylinder Purge the air from the charge hose Trouble analysis Cycle Parts Self-diagnosis function Diagnosis Procedure Precaution in Service or Check Electronic Parts Procedure Specification Remedy Product doesnt operate with the remote controller Check Point Comp. on Comp. OFF Compressor/Outdoor Fan are unable to drive When 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 all DC Peak ErrorError Code ➅ Trouble 8-1When compressor does not operate normally Communication error between Indoor and Outdoor Error Code ➄ Trouble 8-2When compressor does not oprate normally CT Error Error Code ➆ Trouble 8-3When compressor does not oprate normally Problem of missing the connector Outdoor Main PCB Assy Problem of missing the connector Indoor Main PCB AssyConnectors Condition Problem error mode CN-T/Block Indoor Unit Exploded View Outdoor Unit Description Replacement Parts List Panel ASSY, Front SUB No A20061Z October