LG Electronics AS-W096URH0/UBH0/UWH0/UMH0 Soap water method, Evacuation, Finishing the job

Page 27

Installation

Soap water method

1.

Remove the caps from the 2-way and 3-way valves.

2.

Remove the service-port cap from the 3-way valve.

3.

To open the 2-way valve turn the valve stem counterclock-

 

wise approximately 90°, wait for about 2~3 sec, and close it.

4.

Apply a soap water or a liquid neutral detergent on the

 

indoor unit connection or outdoor unit connections by a soft

Liquid side

Gas side

brush to check for leakage of the connecting points of the

piping.

5. If bubbles come out, the pipes have leakage

Evacuation

1.Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit.

Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump.

The operation time for evacuation varies with tubing length and capacity of the pump. The following table shows the time required for evacuation.

Required time for evacuation when 30 gal/h vacuum

pump is used

If tubing length is less

If tubing length is longer

than 10m (33 ft)

than 10m (33 ft)

 

 

10 min. or more

15 min. or more

2.When the desired vacuum is reached, close the "Lo" knob of the manifold valve and stop the vacuum pump.

Finishing the job

1.With a service valve wrench, turn the valve stem of liquid side valve counter-clockwise to fully open the valve.

2.Turn the valve stem of gas side valve counter-clockwise to fully open the valve.

3.Loosen the charge hose connected to the gas side ser- vice port slightly to release the pressure, then remove the hose.

4.Replace the flare nut and its bonnet on the gas side ser- vice port and fasten the flare nut securely with an adjustable wrench. This process is very important to pre- vent leakage from the system.

5.Replace the valve caps at both gas and liquid side ser- vice valves and fasten them tight.

This completes air purging with a vacuum pump. The air conditioner is now ready to test run.

2-way valve (Open)

3-way valve (Close)

Hexagonal wrench

Indoor unit

Outdoor unit

 

Manifold valve

Pressure

Hi

gauge

Lo

 

 

 

Open

Close

Vacuum pump

Cap

Service Manual 27

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Contents LG Room Air Conditioner Table of Contents LG Model Name 2002Code Type Code of Model Meaning Meaning 2003~2005Installation Safety PrecautionsThere is risk of fire, electric shock, explosion, or injury Thinner OperationBe cautious that water could not enter the product Keep level even when installing the productOperation 9k, 12k Btu Series DimensionsSymbols Used in this Manual Indoor UnitOutdoor Unit AS-W096U0 AS-W126U0 AS-W096U1 AS-W126U1 Product SpecificationsOutdoor unit InstallationSelect the best Location Indoor unitFixing Installation Plate Oil trap should be installed every 5~7 metersPiping Length and Elevation Flaring Work Drill a Hole in the WallFoamed polyethylene or equivalent is recom- mended Connecting the PipingCheck IndoorWrap the insulation material around the connecting portion For left rear piping Indoor unit installation Bad case For left piping. Follow the instruction below Good caseOutdoor unit OutdoorConnecting the Cables Circuit Grade Breaker 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 Evaluation of the performance Prepare remote controllerTest Running Settlement of outdoor unitPump Down Pump Down ProcedureFunctions Stand by control at low temp Power relay controlActive power filter controlPSC Overheatng. ProtectionPower moduleCooling Down to 18C Heating Down to 16C Up to 30C Cancel Sleep Mode, Timer on or Timer OFF3, 4, 5, 6 Off Timer High39C Low11COperation LED display of indoor unitLG Brand/OEM Brand Control method Protection of the evaporator pipe from frostingModel Comp. Operating frequency Cooling mode operationIntake air Temp Setting Temp Healthy Dehumidification mode operationHeating mode operation Operating freq. step of compTemp. differences Comp. Operating frequency At beginning Fuzzy mode operationOptionalsIntake air temp Setting temp Fan speed Fuzzy operation for coolingFuzzy operation for dehumidification Fuzzy operation for HeatingChaos swing mode Jet cool mode operationJet heat mode operation Swing modeSleep timer operation Sleep timer operation for cooling cycleSleep timer operation for heating cycle Trial Operation Indoor temp Operating Mode Setting tempAuto restarting operation Forced operationProtection from DC Peak Current Protection from total current controlPortection from overheating of compressor Portection from overheating of power moduleDefrosting control AS-W096/126U0 SeriesAS-W096/126U1 Series Auto Cleaning Auto ChangeoverOptionalLow Ambient To remove the Grille from the Chassis DisassemblyTo remove the Control Box To remove the Discharge GrilleTo remove the Evaporator To remove the Cross-Flow Fan To remove the Motor CoverSchematic Diagram Electric Control DeviceIndoorAS-W096U 0, AS-W126U 0 Series OutdoorAS-W096Series, AS-W126Series Indoor Unit AS-W096/126U0,1 Series Wiring DiagramAS-W126U0 Series Outdoor Unit AS-W096U0 SeriesComponents Location Indoor Main P.W.B Assembly DC PartDisplay ASSEMBLYAS-W096/126U0,1 Series Outdoor Main P.W.B Assembly AS-W096/126U0 Series Model Adopted Electrion Expansion Valve Troubleshooting GuideRefrigeration Cycle Diagram Model Capillary TubeOil trap should be installed per 5~7 meters Pipe Length and the ElevationOutdoor unit Indoor unit Way Valve Liquid Side Way, 3-way ValvePurge the air from the system ProcedureAir purging Check for gas leakagePumping Down Air purging of the charge hoseSet the 2-way valve to the closed position Air purging Re-installationMount the valve stem nuts and the service port nut Re-air PurgingGas leakage Balance Refrigerant of the 3-way ValveAll amount of refrigerant leaked EvacuationPurge the air from the charge hose Gas ChargingAfter Evacuation Connect the charge hose to the charging cylinderTrouble analysis Cycle PartsSelf-diagnosis function Diagnosis Procedure Precaution in Service or CheckElectronic Parts Procedure Specification RemedyProduct doesnt operate with the remote controller Check Point Comp. on Comp. OFF Compressor/Outdoor Fan are unable to driveWhen indoor Fan does not operate Trouble 5 When the horizontal louver does not operate Heater does not operate at all Indoor Outdoor Outdoor Unit does not operate at allDC Peak ErrorError Code ➅ Trouble 8-1When compressor does not operate normallyCommunication error between Indoor and Outdoor Error Code ➄ Trouble 8-2When compressor does not oprate normallyCT Error Error Code ➆ Trouble 8-3When compressor does not oprate normallyCN-T/Block Problem of missing the connector Indoor Main PCB AssyProblem of missing the connector Outdoor Main PCB Assy Connectors Condition Problem error modeIndoor Unit Exploded ViewOutdoor Unit Description Replacement Parts ListPanel ASSY, Front SUB No A20061Z October