Manuals / LG Electronics / Household Appliance / Air Conditioner

LG Electronics LAU121CNM, LAN121CNM, LA121HPMI service manual No. MFL31443001

Models: LA121HPMI LAU121CNM LAN121CNM LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, LA121CPMO

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P/No.: MFL31443001

Printed in Korea

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LG Electronics LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, LA121CPMO No. MFL31443001

Contents

Room Air Conditioner Table of Contents Be sure not to do Be sure to follow the instruction Safety PrecautionsInstallation Do not modify or extend the power cordOperation Moisture may condense and wet or damage furnishings Keep level even when installing the product InstallationDo not block the inlet or outlet of air flow Do not direct airflow at room occupantsReplace all the batteries in the remote DisuseDo not drink the water drained from the unit Indoor Unit DimensionsSymbols Used in this Manual 12k Outdoor UnitIntroduction FeaturesInstallation Tools InstallationInstallation Parts Bushing-Sleeve Installation MapThis Product Contains R-410A Refrigerant Confirm The RefrigerantOutdoor unit Rooftop InstallationsIndoor unit Piping Length and Elevation Drill 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 portionIndoor unit installation Insert the connecting cable into the indoor unitPiping for passage through piping hole Incorrect case Correct caseConnection of Piping -Outdoor Connection of The Drain HoseConnection of The Cable Wiring DiagramFront panel removing How to use the front panel Front panel openingFront panel closing Drain piping Checking The DrainageForming The Piping Leak test Air PurgingAir purging With Vacuum Pump PreparationFinishing the job EvacuationCharging Evaluation 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 restartHeating 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 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 PartsProduct is not operate with the remote controller Compressor/Outdoor Fan are unable to drive 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 12k Models 12k Wiring DiagramModels 12kC/O Models 12kH/P Outdoor UnitIndoor Components LocationOutdoor12k 6306A90009A 6871A00087B6871A00088A 6871A20259DCooling Only Product SpecificationsE.R P.E Cooling & HeatingIndoor Unit Exploded ViewW0CZZ Outdoor Unit 12k Btu/h SeriessParts List Indoor Replacement Parts ListParts List Outdoor No. MFL31443001