LG Electronics LA120CPI Operation, Do not install the product on a defective installation stand

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Safety Precautions

Be cautious when unpacking and installing the product.

For installation, always contact the dealer or an Authorized Service Center.

Do not install the product on a defective installation stand.

•Sharp edges could cause injury. Be especially careful of the case edges and the fins on the con- denser and evaporator.

•There is risk of fire, electric shock, explosion, or injury.

•It may cause injury, accident, or damage to the product.

Be sure the installation area does not deteriorate with age.

•If the base collapses, the air condi- tioner could fall with it, causing property damage, product failure, and personal injury.

Do not let the air conditioner run for a long time when the humidity is very high and a door or a win- dow is left open.

•Moisture may condense and wet or damage furnishings.

■Operation

Take care to ensure that power cords could not be pulled out or damaged during operation.

•There is risk of fire or electrical shock.

Do not place anything on the power cord.

•There is risk of fire or electric shock.

Do not turn the air-conditioner ON or OFF by plugging or unplugging the power plug.

•There is risk of fire or electrical shock.

4Room Air Conditioner

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Contents Room Air Conditioner Table of Contents Safety Precautions InstallationDo not use damaged power cords, plugs, or a loose socket Install the panel and the coverDo not install the product on a defective installation stand OperationWhen flammable gas leaks, turn Do not place a heater or otherDo not use the product in a tight Sounds, odors, or smoke comesKeep level even when installing That water is drained away propProduct when removing Do not use the product for speCial purposes, such as preserv Ing foods, works of art, etc. It is aOutlet while the air conditioner is DisuseIt is not sanitary and could cause Symbols Used in this Manual DimensionsIndoor Unit Outdoor Unit 9k, 12k ModelsProduct Specifications ModelsInstallation Parts InstallationInstallation Tools Installation Map Confirm The Refrigerant This Product Contains R-410A RefrigerantRooftop Installations Select the best LocationIndoor unit Outdoor unitOil trap should be installed every 16.4~23feets 5~7 meters Piping Length and ElevationPreparing Work for Installation Open panel frontCover pipe and cover side remove Drain hose junctionFixing Indoor Unit Pipe and the wire. Refer to installationCase of nothing wrong, connect Flaring work and connection of piping Flaring WorkConnecting the Piping CheckIndoor Foamed polyethylene or equivalent is recommendedWrap the insulation material around the connecting portion Indoor unit tubing Flare nut PipingsFor right piping. Follow the instruction below Good case Bad caseConnection of Piping -Outdoor Connecting the Cables Connection method of the connecting cableExample How to connect wiring to the terminalsConnecting the cable between indoor unit and outdoor unit 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 Charging Panel Front Assembly Prepare remote controller Test RunningSettlement of outdoor unit Evaluation of the performancePump Down Procedure Pump DownHow to replace picture & photograph Operation FunctionsTime delay Safety Control Chaos Swing ModeCooling Operation Mode Function of main controlAuto Operation Electronic control mode Auto Operation for CoolingAuto Operation for Dehumidificationonly Heating Model Healthy DehumidificationAuto Operation for Heatingonly Heating Model Heating Operation Modeonly Heating Model Hot-Start ControlCooling Mode with the Sleep Mode Cooling or Heating Mode with Sleep Mode Auto ControlHeating Mode with the Sleep Modeonly Heating Model Auto restart Forced OperationCooling Heat pump Model Test operationSignal Receptor Display FunctionSelf-diagnosis Function Operation Indication LampsControls Remote Control OperationsNd F Button To remove the Grille from the Chassis DisassemblyTo remove the Control Box Before removing the Turbo Fan To remove the Evaporator. Remove hole tubing holdeTo remove the Motor Schematic Diagram Heat Pump/Cooling Only SeriesIndoor UnitHeat Pump Series/ Cooling Only Series Outdoor Unit Indoor Unit P.W.B. Assembly No A20999A PCB ASSEMBLY, Main Top View Bottom ViewOutdoor Unit P.W.B. Assembly No A20901C PCB ASSEMBLY, Main Top View Bottom ViewNo A20921A PCB Assembly Display P.W.B. ASMWiring Diagram Outdoor UnitCooling Only Models, & Heating Models Troubleshooting Guide Refrigeration Cycle DiagramPiping Length and Elevation Procedure Way ValvePumping Down Air purging of the charge hoseRe-air purging Balance refrigerant of the 3-way valve Gas leakageEvacuation All amount of refrigerant leakedGas Charging After EvacuationConnect the charge hose to the charging cylinder Purge the air from the charge hoseMethod of using graph Method of using equationAccording to Indoor & Outdoor Temperature Additional gas chargingCycle Parts Trouble analysisElectronic Parts 9k model Product does not operate at allProduct is not operate with the remote controller Compressor/Outdoor Fan are unable to drive When indoor Fan does not operate NectorWhen Vertical Louver does not operate When a comunication error occurs Phenomena in case of connecting error Indoor UnitOutdoor Unit Voltage of Connectors according to Indoor Fan Speed RY-COMP-BExploded View Indoor UnitOutdoor Unit Replacement Parts List Parts ListIndoorParts ListOutdoor December No A20926C