LG Electronics LS120HP(AS-H121E1H0), LS090HP(AS-H091E1H0) Balance Refrigerant of the 3-way Valve

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Troubleshooting Guide

Balance Refrigerant of the 3-way Valve

(Gas leakage)

Indoor unit	Liquid side

Outdoor unit

3-Way

valve Open

Gas side

3-Way

valve Open

Lo

OPENCLOSE

• Procedure

(1)Confirm that both the 2-way and 3-way valves are set to the back seat.

(2)Connect the charge set to the 3-way valve’s port.

–Leave the valve on the charge set closed.

–Connect the charge hose to the service port.

(3)Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge indicates 0 kg/cm2G.

–If there is no air in the refrigerant cycle (the pressure when the air conditioner is not running is higher than 1 kg/cm2G), dis- charge the refrigerant until the gauge indi- cates 0.5 to 1 kg/cm2G. if this is the case, it will not be necessary to apply a evacuatin.

–Discharge the refrigerant gradually; if it is discharged too suddenly, the refrigeration oil will also be discharged.

Copyright ©2007 LG Electronics. Inc. All right reserved.	- 47 -
Only for training and service purposes	LGE Internal Use Only
Only for training and service purposes

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Contents SVC MANUALExploded View Table of Contents Be sure not to do Be sure to follow the instruction Safety PrecautionsInstallation Do not modify or extend the power cordOperation There is risk of explosion or fire Oxygen deficiency could occurLow refrigerant levels may cause product failure Keep level even when installing the productOn the product. outdoor unit OccupantsSalt spray directly Solvents, etcReplace all the batteries in the remote DisuseDo not drink the water drained from the unit Model Btu Series DimensionsSymbols Used in this Manual Indoor UnitModel Btu Series Dimension Mminch 109042.9 30011.8 1787.0 9k, 12k Outdoor Unit18k, 24k Introduction FeaturesRead carefully, and then follow step by step InstallationInstallation Parts Installation ToolsAdditional drain pipe Installation MapOperation Indication Lamps This Product Contains R-410A Refrigerant Confirm The RefrigerantOutdoor unit Rooftop InstallationsSelect The Best Location Indoor unitEvap Moz/ft Piping Length And ElevationDrill a Hole In The Wall How To Mount Installation PlatePutting nut on Flaring WorkCut the pipes and the cable Burrs removalIndoor Connecting The PipingIndoor unit installation Tighten the flare nut with a wrench Wrap the insulation material around the connecting portionConnecting cable Insert the connecting cable into the indoor unitIndoor unit installation Connection Indoor Incorrect case Correct caseConnection Of Piping -Outdoor Connection Of The Drain HoseCapacity Connection Of The CableInstallation Avoid these situations Checking The DrainageDrain piping Drain hose should point downward for easy drain flowForming The Piping Preparation Dry nitrogen gas cylinder to this service portAir Purging Air purging With Vacuum PumpFinishing the job EvacuationBtu/h ChargingEvaluation of the performance Prepare remote controlTest Running Settlement of outdoor unitFunction of Controls Cooling Mode OperationHealthy Dehumidification Mode OperationDefrost Control Heating Mode OperationJet Cool Mode Operation H/P Model Sleep Timer OperationChaos Natural Wind Mode Jet Cool Mode Operation C/O ModelProtection of the evaporator pipe from frosting Forced operationTest operation Auto restartThermistor open/short Display FunctionSelf-diagnosis Function Heating ModelRemote Control Operations To remove the Grille from the Chassis DisassemblyTo remove the Evaporator When repair, do not damage the Caution labelTo remove the Motor Cover Cooling & Heating Models Troubleshooting GuideRefrigeration Cycle Diagram Cooling Only ModelsWay Valve Liquid Side Way, 3-way ValvePumping Down ProcedureBalance Refrigerant of the 3-way Valve Vacuum pump After Evacuation Gas ChargingAdditional gas charging Method of using graphMethod of using equation According to Indoor & Outdoor TemperatureTrouble analysis Cycle PartsProduct does not operate at all Electronic Parts 9k modelElectronic Parts 18k model Product is not operate with the remote controller Compressor/Outdoor Fan are unable to drive.9k Model Compressor/Outdoor Fan are unable to drive.18k Model Nector When indoor Fan does not operateWhen Vertical Louver does not operate When a comunication error occurs Indoor Unit Phenomena in case of connecting errorOutdoor Unit Electric Control Device Schematic DiagramOutdoor 9k, 12k Outdoor 18k, 24k Models 9k, 12k, 18k, 24k Wiring DiagramModels 9kC/O Models 12kH/P, 12kC/O, H/P Models 18kC/O Models 18kH/P, 24kC/O, H/P Components Location Main P.W.B Assembly TOP View Bottom ViewTOP View Bottom View Outdoor9k, 12kOutdoor18k, 24k 6871A20680 6871A20681Cooling Only Product SpecificationsLS090HP LS120HP LS180HP LS240HP Cooling & HeatingExploded View Outdoor Unit 9k, 12k C/O Seriess Outdoor Unit 9k, 12k H/P Seriess Outdoor Unit 18kC/O Seriess W0CZZB Outdoor Unit 24kC/O SeriessOutdoor Unit 18k, 24k H/P Seriess No MFL32351801 December