Manuals / LG Electronics / Household Appliance / Air Conditioner

LG Electronics AS-W096URH1/UBH1/UWH1/UMH1, AS-W126URH1/UBH1/UWH1/UMH1 Table of Contents

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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Air Conditioner Service Manual
TABLE OF CONTENTS
LG Model Name	3
Safety Precautions	5
Dimensions	10
Symbols Used in this Manual	10
Indoor Unit	10
Outdoor Unit	11
Product Specifications	12
Installation	13
Select the Best Location	13
Piping Length and Elevation	14
Fixing Installation Plate	14
Drill a Hole in the Wall	15
Flaring Work	15
Connection of Piping	16
Connecting the Cables	22
Checking the Drainage	24
Forming the Piping	25
Air Purging	26
Test Running	28
Functions	30
Operation	33
Disassembly	47
Indoor Unit	47
Schematic Diagram	50
Electric Control device	50
Wiring Diagram	52
Components Location	54
Troubleshooting Guide	57
Refrigeration Cycle Diagram	57
Pipe Length and the Elevation	58
2-way, 3-way Valve	59
Cycle Parts	66
Self-diagnosis Function	67
Electronic Parts	69
Exploded View	80
Indoor Unit	80
Outdoor Unit	81
Replacement Parts List	82
Indoor	82
Outdoor	84

2Room Air Conditioner

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LG Electronics AS-W096URH1/UBH1/UWH1/UMH1, AS-W126URH1/UBH1/UWH1/UMH1, AS-W126URH0/UBH0/UWH0/UMH0/UCH0 Table of Contents

Contents

LG Room Air Conditioner Table of Contents Code Type Code of Model Meaning LG Model Name2002 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 Piping Length and Elevation Fixing Installation PlateOil trap should be installed every 5~7 meters 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 Drain piping Checking the DrainageTo check the drainage Forming the Piping Air purging with vacuum pump Air PurgingAir purging Finishing the job Soap water methodEvacuation 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 LG Brand/OEM Brand OperationLED display of indoor unit 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 Temp. differences Comp. Operating frequency Heating mode operationOperating freq. step of comp 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 for heating cycle Sleep timer operationSleep timer operation for cooling 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 AS-W096/126U1 Series Defrosting controlAS-W096/126U0 Series Low Ambient Auto CleaningAuto ChangeoverOptional Disassembly To remove the Grille from the Chassis To remove the Evaporator To remove the Control BoxTo remove the Discharge Grille To remove the Motor Cover To remove the Cross-Flow Fan IndoorAS-W096U 0, AS-W126U 0 Series Schematic DiagramElectric Control Device 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 Outdoor unit Indoor unit Oil trap should be installed per 5~7 metersPipe Length and the Elevation Way, 3-way Valve Way Valve Liquid Side Check for gas leakage ProcedureAir purging Purge the air from the system Set the 2-way valve to the closed position Pumping DownAir purging of the charge hose 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