Manuals / LG Electronics / Household Appliance / Air Conditioner

LG Electronics AS-W096URH1/UBH1/UWH1/UMH1 Trouble 8-3When compressor does not oprate normally

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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Troubleshooting Guide

Trouble 8-3When compressor does not oprate normally.

■CT Error (Error Code ➆)

Does the operating LED in Display PCB Ass'y blink 7 times?

YES

Is the courrent transformer(CT) in Main PCB Ass'y right?

YES

NO

•Check the state of connecting cable (3 line) bewteen Indoor and Outdoor Unit .

•Check fuse, Noise Filter, PTC, etc.

NO

Check the PCB pattern(resoldering)

NO

Is the indoor/outdoor fan locked?

YES

Is the discharge temperature of Indoor unit right(11°C~17°C) in the cooling mode?

YES

Is the refrigerant pressure right?

YES

Replace the PCB Ass'y.

•Main PCB Ass'y(Outdoor)

•Control Box Ass'y(Outdoor)

Check the indoor/outdoor fan motor.

NO

Check the compressor.

NO

Supply the refrigerant or Discharge the refrigerant.

78Room Air Conditioner

Image 78

LG Electronics AS-W096URH1/UBH1/UWH1/UMH1 Trouble 8-3When compressor does not oprate normally, CT Error Error Code ➆

Contents

LG Room Air Conditioner Table of Contents LG Model Name 2002Code Type Code of Model Meaning 2003~2005 Meaning Safety Precautions Installation There is risk of fire, electric shock, explosion, or injury Operation Thinner Keep level even when installing the product Be cautious that water could not enter the product Operation Indoor Unit DimensionsSymbols Used in this Manual 9k, 12k Btu Series Outdoor Unit Product Specifications AS-W096U0 AS-W126U0 AS-W096U1 AS-W126U1 Indoor unit InstallationSelect the best Location Outdoor unit Fixing Installation Plate Oil trap should be installed every 5~7 metersPiping Length and Elevation Drill a Hole in the Wall Flaring Work Indoor Connecting the PipingCheck Foamed polyethylene or equivalent is recom- mended Wrap the insulation material around the connecting portion For left rear piping Indoor unit installation For left piping. Follow the instruction below Good case Bad case Outdoor Outdoor unit Connecting 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 Settlement of outdoor unit Prepare remote controllerTest Running Evaluation of the performance Pump Down Procedure Pump Down Functions Overheatng. ProtectionPower module Power relay controlActive power filter controlPSC Stand by control at low temp High39C Low11C Cancel Sleep Mode, Timer on or Timer OFF3, 4, 5, 6 Off Timer Cooling Down to 18C Heating Down to 16C Up to 30C Operation LED display of indoor unitLG Brand/OEM Brand Protection of the evaporator pipe from frosting Control method Cooling mode operation Model Comp. Operating frequency Healthy Dehumidification mode operation Intake air Temp Setting Temp Heating mode operation Operating freq. step of compTemp. differences Comp. Operating frequency Fuzzy operation for cooling Fuzzy mode operationOptionalsIntake air temp Setting temp Fan speed At beginning Fuzzy operation for Heating Fuzzy operation for dehumidification Swing mode Jet cool mode operationJet heat mode operation Chaos swing mode Sleep timer operation Sleep timer operation for cooling cycleSleep timer operation for heating cycle Forced operation Indoor temp Operating Mode Setting tempAuto restarting operation Trial Operation Protection from total current control Protection from DC Peak Current Portection from overheating of power module Portection from overheating of compressor Defrosting control AS-W096/126U0 SeriesAS-W096/126U1 Series Auto Cleaning Auto ChangeoverOptionalLow Ambient Disassembly To remove the Grille from the Chassis To remove the Control Box To remove the Discharge GrilleTo remove the Evaporator To remove the Motor Cover To remove the Cross-Flow Fan Schematic Diagram Electric Control DeviceIndoorAS-W096U 0, AS-W126U 0 Series OutdoorAS-W096Series, AS-W126Series Wiring Diagram Indoor Unit AS-W096/126U0,1 Series Outdoor Unit AS-W096U0 Series AS-W126U0 Series Indoor Main P.W.B Assembly DC Part Components Location Display ASSEMBLYAS-W096/126U0,1 Series Outdoor Main P.W.B Assembly AS-W096/126U0 Series Model Capillary Tube Troubleshooting GuideRefrigeration Cycle Diagram Model Adopted Electrion Expansion Valve Oil trap should be installed per 5~7 meters Pipe Length and the ElevationOutdoor unit Indoor unit Way, 3-way Valve Way Valve Liquid Side Check for gas leakage ProcedureAir purging Purge the air from the system Pumping Down Air purging of the charge hoseSet the 2-way valve to the closed position Re-air Purging Re-installationMount the valve stem nuts and the service port nut Air purging Balance Refrigerant of the 3-way Valve Gas leakage Evacuation All amount of refrigerant leaked Connect the charge hose to the charging cylinder Gas ChargingAfter Evacuation Purge the air from the charge hose Cycle Parts Trouble analysis Self-diagnosis function Precaution in Service or Check Diagnosis Procedure Procedure Specification Remedy Electronic Parts Product doesnt operate with the remote controller Compressor/Outdoor Fan are unable to drive Check Point Comp. on Comp. OFF When 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 Outdoor Trouble 8-1When compressor does not operate normally DC Peak ErrorError Code ➅ Trouble 8-2When compressor does not oprate normally Communication error between Indoor and Outdoor Error Code ➄ Trouble 8-3When compressor does not oprate normally CT Error Error Code ➆ Connectors Condition Problem error mode Problem of missing the connector Indoor Main PCB AssyProblem of missing the connector Outdoor Main PCB Assy CN-T/Block Exploded View Indoor Unit Outdoor Unit Replacement Parts List Description Panel ASSY, Front SUB No A20061Z October