LG Electronics LA120HPO Gas Charging, After Evacuation, Purge the air from the charge hose

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Troubleshooting Guide

3. Gas Charging

(After Evacuation)

Indoor unit	Liquid side

Open	Outdoor unit

3-Way valve

Gas side

Open

	3-Way
Check valve	valve
Check valve

Charging cylinder

Lo

(1) OPEN

CLOSE

• Procedure

(1)Connect the charge hose to the charging cylinder.

–Connect the charge hose which you dis-con- nected from the vacuum pump to the valve at the bottom of the cylinder.

–If you are using a gas cylinder, also use a scale and reverse the cylinder so that the sys- tem can be charged with liquid.

(2)Purge the air from the charge hose.

–Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air. (Be careful of the liquid refriger- ant). The procedure is the same if using a gas cylinder.

(3)Open the valve (Lo side on the charge set and charge the system with liquid refrigerant.

–If the system can not be charged with the spec- ified amount of refrigerant, it can be charged with a little at a time (approximately 150g each time) while operating the air conditioner in the cooling cycle; however, one time is not suffi- cient, wait approximately 1 minute and then repeat the procedure (pumping down-pin).

\

This is different from previous procedures. Because you are charging with liquid refrigerant from the gas side, absolutely do not attempt to charge with larger amounts of liquid refrigerant while operating the air conditioner.

(4)Immediately disconnect the charge hose from the 3-way valve’s service port.

–Stopping partway will allow the gas to be dis- charged.

–If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose.

(5)Mount the valve 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.

CAUTION

This unit is charged with R-410A.

Pay attention not to charge R-22.

60Room Air Conditioner

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Contents Room Air Conditioner Table of Contents Safety Precautions InstallationDo not use damaged power cords, plugs, or a loose socket Install the panel and the coverDo not install the product on a defective installation stand OperationWhen flammable gas leaks, turn Do not place a heater or otherDo not use the product in a tight Sounds, odors, or smoke comesKeep level even when installing That water is drained away propProduct when removing Do not use the product for speCial purposes, such as preserv Ing foods, works of art, etc. It is aDisuse Outlet while the air conditioner isIt is not sanitary and could cause Dimensions Symbols Used in this ManualIndoor Unit Outdoor Unit 9k, 12k ModelsProduct Specifications ModelsInstallation Installation PartsInstallation Tools Installation Map Confirm The Refrigerant This Product Contains R-410A RefrigerantRooftop Installations Select the best LocationIndoor unit Outdoor unitOil trap should be installed every 16.4~23feets 5~7 meters Piping Length and ElevationPreparing Work for Installation Open panel frontCover pipe and cover side remove Drain hose junctionPipe and the wire. Refer to installation Fixing Indoor UnitCase of nothing wrong, connect Flaring work and connection of piping Flaring WorkConnecting the Piping CheckIndoor Foamed polyethylene or equivalent is recommendedWrap the insulation material around the connecting portion Indoor unit tubing Flare nut PipingsFor right piping. Follow the instruction below Good case Bad caseConnection of Piping -Outdoor Connecting the Cables Connection method of the connecting cableExample How to connect wiring to the terminalsConnecting the cable between indoor unit and outdoor unit Checking the Drainage To check the drainageDrain piping Forming the Piping Air Purging Air purgingAir purging with vacuum pump Soap water method EvacuationFinishing the job Charging Panel Front Assembly Prepare remote controller Test RunningSettlement of outdoor unit Evaluation of the performancePump Down Procedure Pump DownHow to replace picture & photograph Operation FunctionsTime delay Safety Control Chaos Swing ModeCooling Operation Mode Function of main controlAuto Operation Electronic control mode Auto Operation for CoolingHealthy Dehumidification Auto Operation for Dehumidificationonly Heating ModelAuto Operation for Heatingonly Heating Model Heating Operation Modeonly Heating Model Hot-Start ControlCooling or Heating Mode with Sleep Mode Auto Control Cooling Mode with the Sleep ModeHeating Mode with the Sleep Modeonly Heating Model Auto restart Forced OperationCooling Heat pump Model Test operationSignal Receptor Display FunctionSelf-diagnosis Function Operation Indication LampsRemote Control Operations ControlsNd F Button Disassembly To remove the Grille from the ChassisTo remove the Control Box To remove the Evaporator. Remove hole tubing holde Before removing the Turbo FanTo remove the Motor Schematic Diagram Heat Pump/Cooling Only SeriesIndoor UnitHeat Pump Series/ Cooling Only Series Outdoor Unit Indoor Unit P.W.B. Assembly No A20999A PCB ASSEMBLY, Main Top View Bottom ViewOutdoor Unit P.W.B. Assembly No A20901C PCB ASSEMBLY, Main Top View Bottom ViewNo A20921A PCB Assembly Display P.W.B. ASMWiring Diagram Outdoor UnitCooling Only Models, & Heating Models Troubleshooting Guide Refrigeration Cycle DiagramPiping Length and Elevation Procedure Way ValvePumping Down Air purging of the charge hoseRe-air purging Balance refrigerant of the 3-way valve Gas leakageEvacuation All amount of refrigerant leakedGas Charging After EvacuationConnect the charge hose to the charging cylinder Purge the air from the charge hoseMethod of using graph Method of using equationAccording to Indoor & Outdoor Temperature Additional gas chargingCycle Parts Trouble analysisElectronic Parts 9k model Product does not operate at allProduct is not operate with the remote controller Compressor/Outdoor Fan are unable to drive When indoor Fan does not operate NectorWhen Vertical Louver does not operate When a comunication error occurs Phenomena in case of connecting error Indoor UnitOutdoor Unit Voltage of Connectors according to Indoor Fan Speed RY-COMP-BExploded View Indoor UnitOutdoor Unit Replacement Parts List Parts ListIndoorParts ListOutdoor December No A20926C