Troubleshooting Guide | LG Electronics LA120CPI, LA120HPO, LA090HPO

Troubleshooting Guide

Troubleshooting Guide

RefrigerationCycleDiagram

(1) Cooling Only Models

INDOOR UNIT

LIQUID SIDE

HEAT EXCHANGE (EVAPORATOR)

OUTDOOR UNIT

CAPILLARY TUBE

HEAT EXCHANGE (CONDENSER)

GAS SIDE

COMPRESSOR

(2) Cooling & Heating Models

INDOOR UNIT

HEAT EXCHANGE (EVAPORATOR)

LIQUID SIDE

GAS SIDE

OUTDOOR UNIT

	CHECK VALVE
	CAPILLARY TUBE
		HEAT
		EXCHANGE
		(CONDENSER)
		REVERSING
		VALVE
	COMPRESSOR	COOLING
	COMPRESSOR	HEATING
		HEATING

54Room Air Conditioner

Image 54

LG Electronics LA120CPI, LA120HPO, LA090HPO, LA120CPO, LA120HPI Troubleshooting Guide, Refrigeration Cycle Diagram

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 Disuse Outlet while the air conditioner isIt is not sanitary and could cause Dimensions Symbols Used in this ManualIndoor Unit Outdoor Unit 9k, 12k Models Product Specifications Models Installation Installation PartsInstallation 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 Pipe and the wire. Refer to installation Fixing Indoor UnitCase 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 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 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 Healthy Dehumidification Auto Operation for Dehumidificationonly Heating ModelAuto Operation for Heatingonly Heating Model Heating Operation Modeonly Heating Model Hot-Start Control Cooling or Heating Mode with Sleep Mode Auto Control Cooling Mode with the Sleep ModeHeating 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 Remote 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 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