LG Electronics LSC183VMA service manual Pumping down, Air purging of the charge hose

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2. Pumping down

Indoor unit	Liquid side

Open	Outdoor unit

2-Way valve

Gas side

Closed

3-Way valve

Lo

CLOSECLOSE

Purge the air

• Procedure

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

–Remove the valve stem caps and confirm that the valve stems are in the raised position.

–Be sure to use a hexagonal wrench to operate the valve stems.

(2)Operate the unit for 10 to 15 minutes.

(3)Stop operation and wait for 3 minutes, then connect the charge set to the service port of the 3-way valve.

–Connect the charge hose with the push pin to the service port.

(4)Air purging of the charge hose.

–Open the low-pressure valve on the charge set slightly to air purge from the charge hose.

(6)Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg/cm2g.

(7)Immediately set the 3-way valve to the closed position.

–Do this quickly so that the gauge ends up indicating 3 to 5kg/cm2g.

(8)Disconnect the charge set, and mount the 2- way and 3-way valve’s stem nuts and the service port nut.

–Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m.

–Be sure to check for gas leakage.

(5) Set the 2-way valve to the closed position.

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Contents Room Air Conditioner Contents Code Type Code of Model Meaning Details of 2003 LG Model NameIndoor Unit FunctionsRoom, Temperature Checking Operation ON/OFF Operation Mode SelectionTemperature Setting Setting the Time or Timer Timer SelectionLSC183VMA Product ReferencesIndoor Unit DimensionsIndoor Unit Gas side Outdoor Unit 18KCooling Only Models Refrigeration Cycle Diagram18K Cooling Only Models Wiring DiagramHealthy Dehumidification Mode Cooling Mode OperationOperation Details Defrost Control Heating Mode OperationFuzzy Operation H/P Model Fuzzy Operation C/O ModelFuzzy Operation for Cooling Airflow Speed Selection On-Timer OperationFuzzy Operation for Dehumidification Fuzzy Operation for HeatingOff-Timer ↔ On-Timer Operation Off-Timer OperationSleep Timer Operation Chaos Swing ModeRemote Control Operation Mode Jet Cool Mode Operation H/P ModelForced Operation Test operationDisplay Function Compressor on IndicatorSelf-diagnosis Function Heating ModelInstallation of indoor, Outdoor unit InstallationSelect the best location Piping length and elevationOpen panel front Preparing work for InstallationCover pipe and cover side remove Drain hose junctionHow to fix installation plate Flaring work Flaring Work and Connection of PipingConnection of piping Indoor Wrap the insulation material around the connecting portion Indoor unit installationBad case Installation Information For right piping Good caseConnection of the pipes-Outdoor For right piping. Follow the instruction belowConnection of the cable Connecting The Cable Between Indoor Unit and Outdoor UnitFor strand wiring Connection method of the connecting cableExampleChecking the drainage Checking the Drainage and forming the pipingsForm the piping To check the drainageConnect the cable to the indoor unit Circuit Breaker Use a circuit breaker or time delay fuseAir purging Air PurgingAir purging with vacuum pump PreparationFinishing the job EvacuationDrive three screws Panel Front AssemblyPump Down Procedure Prepare remote controlTest Running Settlement of outdoor unitOperation Name and Function-Remote ControlTo remove the Control Box To remove the Grille from the ChassisBefore removing the Turbo Fan To remove the EvaporatorTo remove the Motor Way Valve Liquid Side Way, 3-way ValveAir purging ProcedureCheck for gas leakage Purge the air from the systemAir purging of the charge hose Pumping downSet the 2-way valve to the closed position Re-air purging Gas leakage Balance refrigerant of the 2-way, 3-way valvesAll amount of refrigerant leaked EvacuationAfter Evacuation Gas ChargingConnect the charge hose to the charging cylinder Purge the air from the charge hoseTrouble analysis Cycle Troubleshooting GuideYES Product is not operate with the remote controller Compressor/Outdoor Fan are unable to drive Check connecting condition of the CN-MOTOR Connector 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 No. of pins Voltage of Connectors according toIndoor Fan Speed Main PWB ASSYIndoor Unit Electronic Control DeviceModel Main PWB ASSYOutdoor UnitDisplay PWB Assembly SUB PCB ASM Indoor UnitMicom Outdoor UnitExploded View and Replacement Parts List Location Description Remarks LSC183VMA Parts ListindoorW0CZZ Outdoor unit18KLocation Description QTY Remarks LSC183VMA Parts ListoutdoorMemo Memo August