LG Electronics LSN120HE, LSN090CE, LSU120CE Moisture may condense and wet or damage furnishings

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Safety Precautions

Do not place a heater or other appliances near the power cable.

There is risk of fire, failure of the product, and/or electric shock.

Do not let the air conditioner run for a long time when the humidi- ty is very high and a door or a window is left open.

Moisture may condense and wet or damage furnishings.

Do not store of use flammable gas or combustibles near the air conditioner.

There is risk of fire or product fail- ure.

Do not use the product in a tightly closed space for a long time.

Oxygen deficiency could occur.

Some ventilation by opeing win- dow is necessary for the fresh air.

Stop operation and close any window in storm or hurricane. before the hurricane arrives.

There is risk of property damage, failure of product, or electric shock.

When flammable gas leaks, turn off the gas and open a window for venti- lation before turning the product on. Do not use the telephone or turn switches on or off.

• There is risk of explosion or fire.

Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

There is risk of physical injury, electric shock, or product.

Wax

Thinner

 

Unplug the unit if strange sounds odors or smoke comes from it.

There is risk of fireproduct failure and/or electric shock.

When the product is soaked (flooded or submerged), contact an Authorized Service Center.

• There is risk of electrical shock.

Service Manual 5

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Contents Room Air Conditioner Table of Contents Installation Safety PrecautionsDo not modify or extend the power cord Be sure not to do Be sure to follow the instructionOperation Moisture may condense and wet or damage furnishings Low refrigerant levels may cause product failure Keep level even when installing the productSalt spray directly OccupantsSolvents, etc On the product. outdoor unitReplace all the batteries in the remote DisuseDo not drink the water drained from the unit Indoor Unit DimensionsSymbols Used in this Manual Model Btu Series Dimension Mminch 109042.9 30011.8 1787.0 9k, 12k Outdoor UnitDIM 18k, 24kIntroduction FeaturesInstallation Tools InstallationInstallation Parts Bushing-Sleeve Installation MapThis Product Contains R-410A Refrigerant Confirm The RefrigerantSelect The Best Location Rooftop InstallationsIndoor unit Outdoor unitEvap Moz/ft Piping Length And ElevationDrill a Hole In The Wall How To Mount Installation PlateCut the pipes and the cable Flaring WorkBurrs removal Putting nut onIndoor Connecting The PipingIndoor unit installation Tighten the flare nut with a wrench Wrap the insulation material around the connecting portionIndoor unit installation Insert the connecting cable into the indoor unitConnection Indoor Incorrect case Correct caseConnection Of Piping -Outdoor Connection Of The Drain HoseConnection Of The Cable Wiring DiagramRoom Air Conditioner Drain piping Checking The DrainageSeal small openings around pipings with a gum type sealer Forming The PipingAir purging With Vacuum Pump Air PurgingPreparation Leak testFinishing the job EvacuationBtu/h ChargingTest Running Prepare remote controlSettlement of outdoor unit Evaluation of the performanceHealthy Dehumidification Mode Cooling Mode OperationOperation Function of ControlsDefrost Control Heating Mode OperationChaos Natural Wind Mode Sleep Timer OperationJet Cool Mode Operation C/O Model Jet Cool Mode Operation H/P ModelTest operation Forced operationAuto restart Protection of the evaporator pipe from frostingHeating Model Display FunctionSelf-diagnosis Function Operation Mode Remote Control OperationsTo remove the Grille from the Chassis DisassemblyTo remove the Control Box To remove the Motor Cover Refrigeration Cycle Diagram Troubleshooting GuideCooling Only Models Cooling & Heating ModelsWay Valve Liquid Side Way, 3-way ValvePumping Down ProcedureBalance Refrigerant of the 3-way Valve Vacuum pump After Evacuation Gas ChargingMethod of using equation Method of using graphAccording to Indoor & Outdoor Temperature Additional gas chargingTrouble 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 Wiring Diagram Models 9kC/O Models 12kH/P, 12kC/O, H/P Models 18kC/O Models 18kH/P, 24kC/O, H/P Components Location Outdoor9k, 12k Outdoor18k, 24k 6871A20680 6871A20681Cooling Only Product SpecificationsLS090HE LS120HE LS180HE LS240HE Cooling & HeatingExploded View Outdoor Unit 9k, 12k Btu/h Seriess 435512 W0CZZ-2 Outdoor Unit 18kH/P, 24k SeriessParts List Indoor Replacement Parts ListLSN180CE LSU120HE Parts List OutdoorReplacement Parts List LSU240HE No A20462V
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