LG Electronics LA090HPO, LA120HPO, LA120CPO, LA120HPI When indoor Fan does not operate, Nector

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Troubleshooting Guide

When indoor Fan does not operate.

Does the voltage of each terminals of CN-MOTOR CONNECTOR in

Indoor unit corresponds to values in the Table of page 72

Does the voltage of terminal of CN-DC/DC CONNECTOR in Indoor unit corresponds to the values in the table of page 72

Check connecting condition of the CN-MOTOR CON-

NECTOR

Do the voltage of terminal of CN-DC/DC CONNECTOR in Outdoor unit corresponds to the values in the table of page 72

Check the pattern and the condition of Indoor unit PWB Ass'y.

Check the interference of Indoor Fan.

NO

Check the patterns and the conditions of outdoor unit PWB Assy's.

Check the connecting condi- tion and disconnection of connecting wires between Indoor and Outdoor unit.

Check the motor of Indoor Fan

Indoor Fan may be stopped in the Soft Dry Mode(change to the Cooling Operation Mode).

Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F. (At that times, Defrost indicator is turned on)

66Room Air Conditioner

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Contents Room Air Conditioner Table of Contents Do not use damaged power cords, plugs, or a loose socket Safety PrecautionsInstallation Install the panel and the coverDo not install the product on a defective installation stand OperationDo not use the product in a tight When flammable gas leaks, turnDo not place a heater or other Sounds, odors, or smoke comesKeep level even when installing That water is drained away propCial purposes, such as preserv Product when removingDo not use the product for spe Ing foods, works of art, etc. It is aDisuse Outlet while the air conditioner isIt is not sanitary and could cause Dimensions Symbols Used in this ManualIndoor Unit Outdoor Unit 9k, 12k ModelsProduct Specifications ModelsInstallation Installation PartsInstallation Tools Installation Map Confirm The Refrigerant This Product Contains R-410A RefrigerantIndoor unit Rooftop InstallationsSelect the best Location Outdoor unitOil trap should be installed every 16.4~23feets 5~7 meters Piping Length and ElevationCover pipe and cover side remove Preparing Work for InstallationOpen panel front Drain hose junctionPipe and the wire. Refer to installation Fixing Indoor UnitCase of nothing wrong, connect Flaring work and connection of piping Flaring WorkIndoor Connecting the PipingCheck 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 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 Charging Panel Front Assembly Settlement of outdoor unit Prepare remote controllerTest Running Evaluation of the performancePump Down Procedure Pump DownHow to replace picture & photograph Operation FunctionsCooling Operation Mode Time delay Safety ControlChaos Swing Mode Function of main controlAuto Operation Electronic control mode Auto Operation for CoolingHealthy Dehumidification Auto Operation for Dehumidificationonly Heating ModelAuto Operation for Heatingonly Heating Model Heating Operation Modeonly Heating Model Hot-Start ControlCooling or Heating Mode with Sleep Mode Auto Control Cooling Mode with the Sleep ModeHeating Mode with the Sleep Modeonly Heating Model Cooling Heat pump Model Auto restartForced Operation Test operationSelf-diagnosis Function Signal ReceptorDisplay Function Operation Indication LampsRemote Control Operations ControlsNd F Button Disassembly To remove the Grille from the ChassisTo remove the Control Box To remove the Evaporator. Remove hole tubing holde Before removing the Turbo FanTo 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 Pumping Down ProcedureWay Valve Air purging of the charge hoseRe-air purging Balance refrigerant of the 3-way valve Gas leakageEvacuation All amount of refrigerant leakedConnect the charge hose to the charging cylinder Gas ChargingAfter Evacuation Purge the air from the charge hoseAccording to Indoor & Outdoor Temperature Method of using graphMethod of using equation 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