Balance refrigerant of the 3-way valve | LG Electronics LA120HPI

Troubleshooting Guide

2) Balance refrigerant of the 3-way valve

(Gas leakage)

Indoor unit	Liquid side

Outdoor unit

3-Way

valve Open

Gas side

3-Way

valve Open

Lo

OPENCLOSE

• Procedure

(1)Confirm that both the liquid side and gas side valves are set to the back seat.

(2)Connect the charge set to the 3-way valve’s port.

–Leave the valve on the charge set closed.

–Connect the charge hose to the service port.

(3)Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge indi- cates 0 kg/cm2G.

–If there is no air in the refrigerant cycle (the pressure when the air conditioner is not running is higher than 1 kg/cm2G), discharge the refrig- erant until the gauge indicates 0.5 to 1 kg/cm2G. if this is the case, it will not be neces- sary to apply a evacuatin.

–Discharge the refrigerant gradually; if it is dis- charged too suddenly, the refrigeration oil will also be discharged.

58Room Air Conditioner

Image 58

LG Electronics LA120HPI, LA120HPO, LA090HPO, LA120CPO, LA120CPI Balance refrigerant of the 3-way valve, Gas leakage

Contents

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