LG Electronics LAN121CNM, LAU121CNM, LA121HPMI service manual Balance Refrigerant of the 3-way Valve

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Troubleshooting Guide

Balance Refrigerant of the 3-way Valve

(Gas leakage)

Indoor unit	Liquid side

Outdoor unit

3-Way

valve Open

Gas side

3-Way

valve Open

OPENCLOSE

• Procedure

(1)Confirm that both the 2-way and 3-way valves are set to the back seat.

(2)Connect the charge set to the 3-way valve’s port.

–Leave the valve on the charge set closed.

–Connect the charge hose to the service port.

(3)Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge indicates 0 kg/cm2G.

–If there is no air in the refrigerant cycle (the pressure when the air conditioner is not running is higher than 1 kg/cm2G), dis- charge the refrigerant until the gauge indi- cates 0.5 to 1 kg/cm2G. if this is the case, it will not be necessary to apply a evacuatin.

–Discharge the refrigerant gradually; if it is discharged too suddenly, the refrigeration oil will also be discharged.

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Contents Room Air Conditioner Table of Contents Installation Safety PrecautionsDo not modify or extend the power cord Be sure not to do Be sure to follow the instructionOperation Moisture may condense and wet or damage furnishings Keep level even when installing the product Do not block the inlet or outlet of air flow Do not direct airflow at room occupantsDisuse Do not drink the water drained from the unitReplace all the batteries in the remote Dimensions Symbols Used in this ManualIndoor Unit 12k Outdoor UnitIntroduction FeaturesInstallation Installation PartsInstallation Tools Bushing-Sleeve Installation MapThis Product Contains R-410A Refrigerant Confirm The RefrigerantRooftop Installations Indoor unitOutdoor unit Piping Length and Elevation Drill a Hole In The Wall How to Mount Installation PlateCut the pipes and the cable Flaring WorkBurrs removal Putting nut onConnecting The Piping Indoor unit installationIndoor 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 DiagramHow to use the front panel Front panel opening Front panel closingFront panel removing Drain piping Checking The DrainageForming The Piping Air purging With Vacuum Pump Air PurgingPreparation Leak testFinishing the job EvacuationCharging Test Running Prepare remote controlSettlement of outdoor unit Evaluation of the performanceHealthy Dehumidification Mode Cooling Mode OperationOperation Function of ControlsDefrost Control Heating Mode OperationChaos Natural Wind Mode Sleep Timer OperationJet Cool Mode Operation C/O Model Jet Cool Mode Operation H/P ModelTest operation Forced operationAuto restart Protection of the evaporator pipe from frostingDisplay Function Self-diagnosis FunctionHeating Model Operation Mode Remote Control OperationsTo remove the Grille from the Chassis DisassemblyTo remove the Control Box To remove the Motor Cover Refrigeration Cycle Diagram Troubleshooting GuideCooling Only Models Cooling & Heating ModelsWay Valve Liquid Side Way, 3-way ValvePumping Down ProcedureBalance Refrigerant of the 3-way Valve Vacuum pump After Evacuation Gas ChargingMethod of using equation Method of using graphAccording to Indoor & Outdoor Temperature Additional gas chargingTrouble 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 Components Location Outdoor12k 6871A00088A 6871A00087B6871A20259D 6306A90009ACooling Only Product SpecificationsE.R P.E Cooling & HeatingExploded View W0CZZ Outdoor Unit 12k Btu/h SeriessParts List Indoor Replacement Parts ListParts List Outdoor No. MFL31443001

LA121HPMI, LAU121CNM, LAN121CNM, LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, LA121CPMO specifications

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