LG Electronics LA090HPO Additional gas charging, Method of using graph, Method of using equation

Page 61

Troubleshooting Guide

Additional gas charging

(Gas leakage)

•When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal operating suc- tion pressure.

•Use the graph or the equation below to get operating suction pressure according to indoor and outdoor tem- perature.

Suction pressure was measured at 3-way valve service port after operating the unit for 10 minutes.

The method of using graph

-Find outdoor temperature.

-Find indoor temperature onto the curve of outdoor temperature.

-Read suction pressure at the axis of ordinates.

The method of using equation

-. Calculate suction pressure after putting indoor and outdoor temperature into the equation.

Operating Suction Pressure (For R410A)

(According to Indoor & Outdoor Temperature)

Suction Pressure (Kg/cm2.g)

		(At operating the Unit for 10 minutes)
	13
	12	50˚C
	12
	11	40˚C
	10	30˚C
	9	20˚C
	8	10˚C
	8	0˚C
		0˚C

7

6

5

5

10

15

20

25

30

35

40

Indoor Temp. (˚C)

Outdoor Temp. (˚C)

P = 3 + 0.0123 x Tout1.5 + 0.8 x Tin0.5

Where, P : Suction Pressure(kg/cm2.g)

Tout : Outdoor Temperature(˚C)

Tin : Indoor Temperature(˚C)

Service Manual 61

Image 61

Contents Room Air Conditioner Table of Contents Installation Safety PrecautionsDo not use damaged power cords, plugs, or a loose socket Install the panel and the coverOperation Do not install the product on a defective installation standDo not place a heater or other When flammable gas leaks, turnDo not use the product in a tight Sounds, odors, or smoke comesThat water is drained away prop Keep level even when installingDo not use the product for spe Product when removingCial purposes, such as preserv Ing foods, works of art, etc. It is aOutlet while the air conditioner is DisuseIt is not sanitary and could cause Symbols Used in this Manual DimensionsIndoor Unit 9k, 12k Models Outdoor UnitModels Product SpecificationsInstallation Parts InstallationInstallation Tools Installation Map This Product Contains R-410A Refrigerant Confirm The RefrigerantSelect the best Location Rooftop InstallationsIndoor unit Outdoor unitPiping Length and Elevation Oil trap should be installed every 16.4~23feets 5~7 metersOpen panel front Preparing Work for InstallationCover pipe and cover side remove Drain hose junctionFixing Indoor Unit Pipe and the wire. Refer to installationCase of nothing wrong, connect Flaring Work Flaring work and connection of pipingCheck Connecting the PipingIndoor Foamed polyethylene or equivalent is recommendedIndoor unit tubing Flare nut Pipings Wrap the insulation material around the connecting portionBad case For right piping. Follow the instruction below Good caseConnection of Piping -Outdoor Connecting the Cables How to connect wiring to the terminals Connection method of the connecting cableExampleConnecting the cable between indoor unit and outdoor unit To check the drainage Checking the DrainageDrain piping Forming the Piping Air purging Air PurgingAir purging with vacuum pump Evacuation Soap water methodFinishing the job Charging Panel Front Assembly Test Running Prepare remote controllerSettlement of outdoor unit Evaluation of the performancePump Down Pump Down ProcedureHow to replace picture & photograph Functions OperationChaos Swing Mode Time delay Safety ControlCooling Operation Mode Function of main controlAuto Operation for Cooling Auto Operation Electronic control modeAuto Operation for Dehumidificationonly Heating Model Healthy DehumidificationAuto Operation for Heatingonly Heating Model Hot-Start Control Heating Operation Modeonly Heating ModelCooling Mode with the Sleep Mode Cooling or Heating Mode with Sleep Mode Auto ControlHeating Mode with the Sleep Modeonly Heating Model Forced Operation Auto restartCooling Heat pump Model Test operationDisplay Function Signal ReceptorSelf-diagnosis Function Operation Indication LampsControls Remote Control OperationsNd F Button To remove the Grille from the Chassis DisassemblyTo remove the Control Box Before removing the Turbo Fan To remove the Evaporator. Remove hole tubing holdeTo remove the Motor Heat Pump/Cooling Only SeriesIndoor Unit Schematic DiagramHeat Pump Series/ Cooling Only Series Outdoor Unit No A20999A PCB ASSEMBLY, Main Top View Bottom View Indoor Unit P.W.B. AssemblyNo A20901C PCB ASSEMBLY, Main Top View Bottom View Outdoor Unit P.W.B. AssemblyDisplay P.W.B. ASM No A20921A PCB AssemblyWiring Diagram Outdoor UnitCooling Only Models, & Heating Models Refrigeration Cycle Diagram Troubleshooting GuidePiping Length and Elevation Way Valve ProcedurePumping Down Air purging of the charge hoseRe-air purging Gas leakage Balance refrigerant of the 3-way valveAll amount of refrigerant leaked EvacuationAfter Evacuation Gas ChargingConnect the charge hose to the charging cylinder Purge the air from the charge hoseMethod of using equation Method of using graphAccording to Indoor & Outdoor Temperature Additional gas chargingTrouble analysis Cycle PartsProduct does not operate at all Electronic Parts 9k modelProduct 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 RY-COMP-B Voltage of Connectors according to Indoor Fan SpeedIndoor Unit Exploded ViewOutdoor Unit Parts ListIndoor Replacement Parts ListParts ListOutdoor December No A20926C