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LG Electronics AS-W126URH0/UBH0/UWH0/UMH0/UCH0 Troubleshooting Guide, Refrigeration Cycle Diagram

Models: AS-W096URH1/UBH1/UWH1/UMH1 AS-W126URH1/UBH1/UWH1/UMH1 AS-W096URH0/UBH0/UWH0/UMH0 AS-W126URH0/UBH0/UWH0/UMH0/UCH0

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Page 57

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Troubleshooting Guide

Troubleshooting Guide

RefrigerationCycleDiagram

(1) Model Capillary Tube

INDOOR UNIT

HEAT EXCHANGE (EVAPORATOR)

		OUTDOOR UNIT
LIQUID SIDE	CHECK VALVE
LIQUID SIDE
3-WAY VALVE
		HEAT
		EXCHANGE
		(CONDENSER)
GAS SIDE
3-WAY VALVE	ACCUMU	REVERSING
3-WAY VALVE		VALVE
		VALVE
	LATOR
		COMPRESSOR	COOLING
		COMPRESSOR	HEATING
			HEATING

(2) Model Adopted Electrion Expansion Valve

INDOOR UNIT

HEAT EXCHANGE (EVAPORATOR)

		OUTDOOR UNIT
LIQUID SIDE
3-WAY VALVE		EER
3-WAY VALVE
		HEAT
		EXCHANGE
		(CONDENSER)
GAS SIDE
3-WAY VALVE	ACCUMU	REVERSING
3-WAY VALVE		VALVE
		VALVE
	LATOR
		COMPRESSOR	COOLING
		COMPRESSOR	HEATING
			HEATING

Service Manual 57

Image 57

LG Electronics AS-W126URH0/UBH0/UWH0/UMH0/UCH0 Troubleshooting Guide, Refrigeration Cycle Diagram, Model Capillary Tube

Contents

LG Room Air Conditioner Table of Contents LG Model Name 2002Code Type Code of Model Meaning Meaning 2003~2005 Installation Safety Precautions There is risk of fire, electric shock, explosion, or injury Thinner Operation Be cautious that water could not enter the product Keep level even when installing the product Operation Symbols Used in this Manual DimensionsIndoor Unit 9k, 12k Btu Series Outdoor Unit AS-W096U0 AS-W126U0 AS-W096U1 AS-W126U1 Product Specifications Select the best Location InstallationIndoor unit Outdoor unit Fixing Installation Plate Oil trap should be installed every 5~7 metersPiping Length and Elevation Flaring Work Drill a Hole in the Wall Check Connecting the PipingIndoor Foamed polyethylene or equivalent is recom- mended Wrap the insulation material around the connecting portion For left rear piping Indoor unit installation Bad case For left piping. Follow the instruction below Good case Outdoor unit Outdoor Connecting 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 Test Running Prepare remote controllerSettlement of outdoor unit Evaluation of the performance Pump Down Pump Down Procedure Functions Active power filter controlPSC Power relay controlOverheatng. ProtectionPower module Stand by control at low temp 3, 4, 5, 6 Off Timer Cancel Sleep Mode, Timer on or Timer OFFHigh39C Low11C Cooling Down to 18C Heating Down to 16C Up to 30C Operation LED display of indoor unitLG Brand/OEM Brand Control method Protection of the evaporator pipe from frosting Model Comp. Operating frequency Cooling mode operation Intake air Temp Setting Temp Healthy Dehumidification mode operation Heating mode operation Operating freq. step of compTemp. differences Comp. Operating frequency Intake air temp Setting temp Fan speed Fuzzy mode operationOptionalsFuzzy operation for cooling At beginning Fuzzy operation for dehumidification Fuzzy operation for Heating Jet heat mode operation Jet cool mode operationSwing mode Chaos swing mode Sleep timer operation Sleep timer operation for cooling cycleSleep timer operation for heating cycle Auto restarting operation Indoor temp Operating Mode Setting tempForced operation Trial Operation Protection from DC Peak Current Protection from total current control Portection from overheating of compressor Portection from overheating of power module Defrosting control AS-W096/126U0 SeriesAS-W096/126U1 Series Auto Cleaning Auto ChangeoverOptionalLow Ambient To remove the Grille from the Chassis Disassembly To remove the Control Box To remove the Discharge GrilleTo remove the Evaporator To remove the Cross-Flow Fan To remove the Motor Cover Schematic Diagram Electric Control DeviceIndoorAS-W096U 0, AS-W126U 0 Series OutdoorAS-W096Series, AS-W126Series Indoor Unit AS-W096/126U0,1 Series Wiring Diagram AS-W126U0 Series Outdoor Unit AS-W096U0 Series Components Location Indoor Main P.W.B Assembly DC Part Display ASSEMBLYAS-W096/126U0,1 Series Outdoor Main P.W.B Assembly AS-W096/126U0 Series Refrigeration Cycle Diagram Troubleshooting GuideModel Capillary Tube Model Adopted Electrion Expansion Valve Oil trap should be installed per 5~7 meters Pipe Length and the ElevationOutdoor unit Indoor unit Way Valve Liquid Side Way, 3-way Valve Air purging ProcedureCheck for gas leakage Purge the air from the system Pumping Down Air purging of the charge hoseSet the 2-way valve to the closed position Mount the valve stem nuts and the service port nut Re-installationRe-air Purging Air purging Gas leakage Balance Refrigerant of the 3-way Valve All amount of refrigerant leaked Evacuation After Evacuation Gas ChargingConnect the charge hose to the charging cylinder Purge the air from the charge hose Trouble analysis Cycle Parts Self-diagnosis function Diagnosis Procedure Precaution in Service or Check Electronic Parts Procedure Specification Remedy Product doesnt operate with the remote controller Check Point Comp. on Comp. OFF Compressor/Outdoor Fan are unable to drive When 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 all DC Peak ErrorError Code ➅ Trouble 8-1When compressor does not operate normally Communication error between Indoor and Outdoor Error Code ➄ Trouble 8-2When compressor does not oprate normally CT Error Error Code ➆ Trouble 8-3When compressor does not oprate normally Problem of missing the connector Outdoor Main PCB Assy Problem of missing the connector Indoor Main PCB AssyConnectors Condition Problem error mode CN-T/Block Indoor Unit Exploded View Outdoor Unit Description Replacement Parts List Panel ASSY, Front SUB No A20061Z October