Evacuation | LG Electronics LA120CPI, LA120HPO, LA090HPO, LA120CPO

Troubleshooting Guide

2. Evacuation

(All amount of refrigerant leaked)

Indoor unit	Liquid side
Indoor unit
		Outdoor unit
	3-Way
	valve	Open
	Gas side
	3-Way
	valve	Open
Vacuum pump
	Lo
OPEN	CLOSE

• Procedure

(1)Connect the vacuum pump to the center hose of charge set center hose

(2)Evacuation for approximately one hour.

–Confirm that the gauge needle has moved toward -76 cmHg (vacuum of 4 mmHg or less).

(3)Close the valve (Lo side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approxima- tely 5 minutes after turning off the vacuum pump).

(4)Disconnect the charge hose from the vacuum pump.

–Vacuum pump oil.

If the vacuum pump oil becomes dirty or depleted, replenish as needed.

Service Manual 59

Image 59

LG Electronics LA120CPI, LA120HPO, LA090HPO, LA120CPO, LA120HPI service manual Evacuation, All amount of refrigerant leaked

Contents

Room Air Conditioner Table of Contents Install the panel and the cover Safety PrecautionsInstallation Do not use damaged power cords, plugs, or a loose socket Operation Do not install the product on a defective installation stand Sounds, odors, or smoke comes When flammable gas leaks, turnDo not place a heater or other Do not use the product in a tight That water is drained away prop Keep level even when installing Ing foods, works of art, etc. It is a Product when removingDo not use the product for spe Cial purposes, such as preserv It is not sanitary and could cause DisuseOutlet while the air conditioner is Indoor Unit DimensionsSymbols Used in this Manual 9k, 12k Models Outdoor Unit Models Product Specifications Installation Tools InstallationInstallation Parts Installation Map This Product Contains R-410A Refrigerant Confirm The Refrigerant Outdoor unit Rooftop InstallationsSelect the best Location Indoor unit Piping Length and Elevation Oil trap should be installed every 16.4~23feets 5~7 meters Drain hose junction Preparing Work for InstallationOpen panel front Cover pipe and cover side remove Case of nothing wrong, connect Pipe and the wire. Refer to installationFixing Indoor Unit Flaring Work Flaring work and connection of piping Foamed polyethylene or equivalent is recommended Connecting the PipingCheck Indoor Indoor unit tubing Flare nut Pipings Wrap the insulation material around the connecting portion Bad case For right piping. Follow the instruction below Good case Connection of Piping -Outdoor Connecting the Cables How to connect wiring to the terminals Connection method of the connecting cableExample Connecting the cable between indoor unit and outdoor unit Drain piping Checking the DrainageTo check the drainage Forming the Piping Air purging with vacuum pump Air PurgingAir purging Finishing the job Soap water methodEvacuation Charging Panel Front Assembly Evaluation of the performance Prepare remote controllerTest Running Settlement of outdoor unit Pump Down Pump Down Procedure How to replace picture & photograph Functions Operation Function of main control Time delay Safety ControlChaos Swing Mode Cooling Operation Mode Auto Operation for Cooling Auto Operation Electronic control mode Auto Operation for Heatingonly Heating Model Healthy DehumidificationAuto Operation for Dehumidificationonly Heating Model Hot-Start Control Heating Operation Modeonly Heating Model Heating Mode with the Sleep Modeonly Heating Model Cooling or Heating Mode with Sleep Mode Auto ControlCooling Mode with the Sleep Mode Test operation Auto restartForced Operation Cooling Heat pump Model Operation Indication Lamps Signal ReceptorDisplay Function Self-diagnosis Function Nd F Button Remote Control OperationsControls To remove the Control Box DisassemblyTo remove the Grille from the Chassis To remove the Motor To remove the Evaporator. Remove hole tubing holdeBefore removing the Turbo Fan Heat Pump/Cooling Only SeriesIndoor Unit Schematic Diagram Heat Pump Series/ Cooling Only Series Outdoor Unit No A20999A PCB ASSEMBLY, Main Top View Bottom View Indoor Unit P.W.B. Assembly No A20901C PCB ASSEMBLY, Main Top View Bottom View Outdoor Unit P.W.B. Assembly Display P.W.B. ASM No A20921A PCB Assembly Wiring Diagram Outdoor UnitCooling Only Models, & Heating Models Refrigeration Cycle Diagram Troubleshooting Guide Piping Length and Elevation Air purging of the charge hose ProcedureWay Valve Pumping Down Re-air purging Gas leakage Balance refrigerant of the 3-way valve All amount of refrigerant leaked Evacuation Purge the air from the charge hose Gas ChargingAfter Evacuation Connect the charge hose to the charging cylinder Additional gas charging Method of using graphMethod of using equation According to Indoor & Outdoor Temperature Trouble analysis Cycle Parts Product does not operate at all Electronic Parts 9k model Product is not operate with the remote controller Compressor/Outdoor Fan are unable to drive Nector When indoor Fan does not operate When Vertical Louver does not operate When a comunication error occurs Indoor Unit Phenomena in case of connecting error Outdoor Unit RY-COMP-B Voltage of Connectors according to Indoor Fan Speed Indoor Unit Exploded View Outdoor Unit Parts ListIndoor Replacement Parts List Parts ListOutdoor December No A20926C