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LG Electronics manual Window Air Conditioner, Svc Manual, MODEL LP121CEM-Y8, Internal Use Only

Models: LP121CEM-Y8

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Internal Use Only

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Window Air Conditioner

SVC MANUAL

MODEL : LP121CEM-Y8

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

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LG Electronics manual Window Air Conditioner, Svc Manual, MODEL LP121CEM-Y8, Internal Use Only

Contents

SVC MANUAL Window Air ConditionerMODEL LP121CEM-Y8 Internal Use OnlyLGE Internal Use Only 1. SpecificationModel LP121CEM-Y8THE SLEEVE AND THE REAR GRILLE 1.2 FEATURES AND BENEFITSCompressor Restart Delay Fan-Only Setting - High/LowOutdoor Air Temperature Switchover Door Switch/Occupancy SensorTemperature limits Quick Heater RecoveryOPERATION ELECTRIC HEATING MODEL 1.3 CONTROL LOCATIONSVENTILATION COOLING ONLY MODEL1.4 ADDITIONAL CONTROLS TEMPERATURE LIMITINGREMOVING THE FRONT GRILLE ADDITIONAL CONTROLSENERGY SAVER REMOTE/LOCAL CONTROLFRONT DESK CONTROL REMOTE WALL THERMOSTAT2.1 MECHANICAL PARTS 2. Disassembly Instructions2.1.1 FRONT GRILLE 2.1.2 CONTROL BOX 2.2.1 ELECTRIC HEATER ELECTRIC HEATER MODEL ONLY 2.2 AIR HANDLING PARTS2.2.3 AXIAL FAN 2.2.2 CROSS FLOW FAN2.2.4 SHROUD 2.3. ELECTRICAL PARTS2.3.1 OUTDOOR MOTOR 2.3.3 COMPRESSOR2.3.6 P.C.B 2.3.5 POWER CORD2.4.1 CONDENSER 2.4 REFRIGERATION CYCLE2.4.2 EVAPORATOR 2.4.3 CAPILLARY TUBEReplacement of the refrigeration cycle Figure 21 B-Charging Figure 21 A-Pulling Vacuum3.1 HOW TO INSTALL THE UNIT 3. InstallationDimension of air conditioner Dimension of sleeve assembly optional3.2.1 Wall Case Installation Data 3.2 WALL SLEEVE INSTALLATIONGeneral 3.2.2 PREPARATION OF THE FRONT GRILLE Installation of Wall Case in Wall OpeningPreparation of the Wall Case for All Types of Construction Brick, Frame, Stucco and Shingle ConstructionLGE Internal Use Only Only for training and service purposesSub-Base Connected FRAME AND BRICK VENEER INSTALLATIONWALL SECTION - DETAILED SIDE VIEW Cord Set Connected3.2.3 UNIT INSTALLATION 3.3 ELECTRICAL REQUIREMENTS 3.3.2 ELECTRICAL SAFETY3.3.1 ELECTRICAL DATA FOR 230/208V MODEL 230/208 volt receptacle configurationInstallation 4. FieldInstalledAccessoriesControl Panel Key Lock DescriptionInstallation Condensate Disposal Pump Kit InstallationDescription ReceivingLGE Internal Use Only 10. Place the top cover assembly back into the unit15. Assembly the unit back following the reverse order of disassembly on any PTAC installation InstallationArchitecture Grille Aluminum - Single PackCondensate Drain kit Drain InstallationInstallation ReceivingFigure 42 - Outdoor Drain Kit Installation Outdoor Drain Kit InstallationLeveling Legs Indoor Drain Kit InstallationInstallation ChecklistFigure 48 - Leveling Leg Assembly Leveling Leg AssemblyInstallation on Wall Sleeve Figure 49 - Leveling Leg Installation on Wall SleeveJunction Box Kit Installation and Wiring Procedure Hard Wire KitInstallation Description265 Volt Units 208/230 Volt UnitsFigure 50 - Mounting Hard Wire Junction Box Kit Figure 52 - Electrical Wiring RoutingInstallation Remote Escutcheon KitDescription ReceivingInstallation SubbaseDescription ReceivingFigure 60 - Wiring Diagram Figure 59 - DimensionsThe proper subbase must be ordered to obtain the correct electrical receptacle. Figure5.1 OUTSIDE DIMENSIONS 5. TroubleshootingGuide5.2 PIPING SYSTEM Unit is running but cooling is ineffective Ineffective Cooling 5.3 TROUBLESHOOTING GUIDEFails to Start CAUSE COMPLAINTREMEDY COMPLAINT ROOM AIR CONDITIONER VOLTAGE LIMITSCAUSE REMEDYCAUSE COMPLAINTREMEDY Th2 Th1 HEAT EXCHANGER EVAPORATOR 6. PipingDiagramsCAPILLARY TUBE HEAT EXCHANGER CONDENSER COMPRESSOR In part A, there are 3 types 7.Schematic DiagramIn part B, there are 3 types 8. ExplodedView Copper pipe Aluminum pipe CONDENSER OUTDOOR SERVICE REPLACEMENT PROCEDUREBrazing point in assembling orFEBRUARY P/NO MFL42137114