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LG Electronics LP121CEM-Y8 manual TroubleshootingGuide, Outside Dimensions, Piping System

Models: LP121CEM-Y8

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5. TroubleshootingGuide

5.1 OUTSIDE DIMENSIONS

1,066mm (42")

406mm (16")

505mm (20")

406mm (16")

5.2 PIPING SYSTEM

Following is a brief description of the important components and their functions in the refrigeration system. Refer to Figure 62 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle.

ROOM AIR CONDITIONER

CYCLE OF REFRIGERATION

EVAPORATOR COILS

CONDENSER COILS

COOLED AIR

	SUCTION LIME	VAPOR INLET
COMPLETE LIQUID
	COOL LOW PRESSURE VAPOR
BOIL OFF POINT

ROOM AIR HEAT LOAD

OUTSIDE COOLING

AIR FOR REFRIGERANT

PASS THROUGH

MOTOR

COMPRESSOR

OIL

HOT DISCHARGED AIR

LIQUID PRESSURE DROP

LIQUID OUTLET

(LIQUID REFRIGERANT)

HIGH PRESSURE VAPOR

CAPILLARY TUBE		LIQUID PEFRIGERANT
CAPILLARY TUBE

Figure 62

LOW PRESSURE VAPOR

Copyright ©2008 LG Electronics. Inc. All right reserved.	- 38 -
Only for training and service purposes	LGE Internal Use Only
Only for training and service purposes

Page 38

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LG Electronics LP121CEM-Y8 manual TroubleshootingGuide, Outside Dimensions, Piping System

Contents

MODEL LP121CEM-Y8 Window Air ConditionerSVC MANUAL Internal Use OnlyModel 1. SpecificationLGE Internal Use Only LP121CEM-Y8Compressor Restart Delay 1.2 FEATURES AND BENEFITSTHE SLEEVE AND THE REAR GRILLE Fan-Only Setting - High/LowTemperature limits Door Switch/Occupancy SensorOutdoor Air Temperature Switchover Quick Heater RecoveryVENTILATION 1.3 CONTROL LOCATIONSOPERATION ELECTRIC HEATING MODEL COOLING ONLY MODELREMOVING THE FRONT GRILLE TEMPERATURE LIMITING1.4 ADDITIONAL CONTROLS ADDITIONAL CONTROLSFRONT DESK CONTROL REMOTE/LOCAL CONTROLENERGY SAVER REMOTE WALL THERMOSTAT2.1.1 FRONT GRILLE 2. Disassembly Instructions2.1 MECHANICAL PARTS 2.1.2 CONTROL BOX 2.2 AIR HANDLING PARTS 2.2.1 ELECTRIC HEATER ELECTRIC HEATER MODEL ONLY2.2.2 CROSS FLOW FAN 2.2.3 AXIAL FAN2.3.1 OUTDOOR MOTOR 2.3. ELECTRICAL PARTS2.2.4 SHROUD 2.3.3 COMPRESSOR2.3.5 POWER CORD 2.3.6 P.C.B2.4.2 EVAPORATOR 2.4 REFRIGERATION CYCLE2.4.1 CONDENSER 2.4.3 CAPILLARY TUBEReplacement of the refrigeration cycle Figure 21 A-Pulling Vacuum Figure 21 B-ChargingDimension of air conditioner 3. Installation3.1 HOW TO INSTALL THE UNIT Dimension of sleeve assembly optionalGeneral 3.2 WALL SLEEVE INSTALLATION3.2.1 Wall Case Installation Data Preparation of the Wall Case for All Types of Construction Installation of Wall Case in Wall Opening3.2.2 PREPARATION OF THE FRONT GRILLE Brick, Frame, Stucco and Shingle ConstructionOnly for training and service purposes LGE Internal Use OnlyWALL SECTION - DETAILED SIDE VIEW FRAME AND BRICK VENEER INSTALLATIONSub-Base Connected Cord Set Connected3.2.3 UNIT INSTALLATION 3.3.1 ELECTRICAL DATA FOR 230/208V MODEL 3.3.2 ELECTRICAL SAFETY3.3 ELECTRICAL REQUIREMENTS 230/208 volt receptacle configurationControl Panel Key Lock 4. FieldInstalledAccessoriesInstallation DescriptionDescription Condensate Disposal Pump Kit InstallationInstallation Receiving10. Place the top cover assembly back into the unit LGE Internal Use Only15. Assembly the unit back following the reverse order of disassembly Architecture Grille Aluminum - Single Installationon any PTAC installation PackInstallation Drain InstallationCondensate Drain kit ReceivingOutdoor Drain Kit Installation Figure 42 - Outdoor Drain Kit InstallationInstallation Indoor Drain Kit InstallationLeveling Legs ChecklistInstallation on Wall Sleeve Leveling Leg AssemblyFigure 48 - Leveling Leg Assembly Figure 49 - Leveling Leg Installation on Wall SleeveInstallation Hard Wire KitJunction Box Kit Installation and Wiring Procedure DescriptionFigure 50 - Mounting Hard Wire Junction Box Kit 208/230 Volt Units265 Volt Units Figure 52 - Electrical Wiring RoutingDescription Remote Escutcheon KitInstallation ReceivingDescription SubbaseInstallation ReceivingThe proper subbase must be ordered to obtain the correct Figure 59 - DimensionsFigure 60 - Wiring Diagram electrical receptacle. Figure5.2 PIPING SYSTEM 5. TroubleshootingGuide5.1 OUTSIDE DIMENSIONS 5.3 TROUBLESHOOTING GUIDE Unit is running but cooling is ineffective Ineffective CoolingFails to Start REMEDY COMPLAINTCAUSE CAUSE ROOM AIR CONDITIONER VOLTAGE LIMITSCOMPLAINT REMEDYREMEDY COMPLAINTCAUSE CAPILLARY TUBE HEAT EXCHANGER CONDENSER COMPRESSOR 6. PipingDiagramsTh2 Th1 HEAT EXCHANGER EVAPORATOR In part B, there are 3 types 7.Schematic DiagramIn part A, there are 3 types 8. ExplodedView Brazing point in CONDENSER OUTDOOR SERVICE REPLACEMENT PROCEDURECopper pipe Aluminum pipe assembling orP/NO MFL42137114 FEBRUARY