LG Electronics AMNC123DEA0(LMN120CE), AMNH123DEA0(LMN120HE) Power input AC 230V.Outdoor, Indoor

Page 73

			Troubleshooting Guide

Error	Title	Cause of error	Check point & Normal condition
code	Title	Cause of error	Check point & Normal condition
code

			• Power input AC 230V.(Outdoor, Indoor)
			• The connector for transmission is disconnected.
05 / 53	Communication		• The connecting wires are misconnected.
05 / 53	(Indoor ➔ Outdoor)	• Communication poorly	• The GND 1,2 is not connected at main GND.
	(Indoor ➔ Outdoor)	• Communication poorly	• The GND 1,2 is not connected at main GND.
			• The communication line is shorted at GND.
			• Transmission circuit of outdoor PCB is abnormal.
			• Transmission circuit of indoor PCB is abnormal.

❑Check Point

1.Check the input power AC 230V.(Outdoor, Indoor)

2.Check the communication wires are correctly connected.

➔Adjust the connection of wire

➔Confirm the wire of "Live", "Neutral".

3.Check the resistance between communication line and GND.(Normal : Over 2MΩ )

4.Check the connector for communication is correctly connected.

5.Check the connection of GND1, GND2, and main GND.

6.If one indoor unit is operated normally, outdoor PCB is no problem.

➔Check the another indoor unit.

* CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.

Service Manual 73

Image 73

Contents Outdoor Unit A3UH363FA0LMU360HE A3UC363FA0LMU360CE Indoor Unit Room Type Art Cool TypeTable of Contents Indoor Unit Model Number NomenclatureOutdoor Unit Combination table Symbols Used in this ManualInstallation Safety PrecautionsBe sure not to do Be sure to follow the instruction Control box securely Cuit and breakerBe cautious when unpacking Do not place anything on the power cableBe sure the installation area does not deteriorate with age OperationDo not allow water to run into electric parts Nect the power supply cableSmoke comes from product Hurricane arrivesInstall the drain hose to ensure that Keep level even when When the product is soakedInstalling the product Not enter the productAir flow OperationalVents, etc Not use harsh detergents, solWhen cleaning or maintaining Ly. Clean the filter every twoDo not step on or put anyting on the product. outdoor units Do not drink the water drained from the productIndoor Unit DimensionsSplit Type Indoor Outdoor Unit Indoor Unit Product SpecificationsModel A3UC363FA0LMU360CE A3UH363FA0LMU360HE Outdoor Unit Multiple piping modelsInstallation Parts InstallationInstallation Tools Select the best location Rooftop InstallationsOutdoor unit Multi Piping Type Piping length and elevationFixing Installation PlateStandard Type Open panel front Preparing work for Installation Artcool Type OnlyRemove cover pipe and cover side Drain hose junctionPut an Installation Guide Map on the desired surface Sticking the installation guide map and fixing Indoor unitDrill a hole in the wall Drive the fore plastic anchors into drilled pointsFlaring work Flaring Work and Connection of PipingCheck Connecting the PipingIndoor Wrap the insulation material around the connecting por- tion For left rear piping Plastic bands Insulation material Connection Indoor Drive two screws Panel AssemblyArt Cool Type onlyBad case Good caseRemote Control Preparationoptional Outdoor unit OutdoorConnect the cable to the Indoor unit Connecting the Cable between Indoor Unit and Outdoor UnitOutdoor unit Connect the cable to the Outdoor unitHow to connect wiring to the terminals Connection method of the connecting cableExampleConnect the cable to the indoor unit To check the drainage Checking the drainageDrain piping Forming the piping Checking method Air Purging and EvacuationPreparation Leakage testEvacuation Repeat evacuation procedure for each indoor unitFinishing the job Additional ChargingSplit, Art Cool Type Test RunningSoft Dry Operation Mode Cooling Mode OperationHeating Mode Operation OperationFuzzy Operation Defrost ControlHeatingFuzzy Operation for Cooling Off-Timer Operation On-Timer OperationAirflow Speed Selection Fuzzy Operation for DehumidificationSleep Timer Operation Off-Timer = On-Timer OperationChaos Swing Mode Chaos Natural Wind ModeBuzzer Sounding Operation Forced OperationSplit Type Indoor Unit Function of Indoor UnitArt Cool Type Indoor Unit IndicatorOperation DefrostDeice control HeatingFunction of Outdoor Unit Cooling Model , Heat Pump Model Remote Control Operation15 2nd F Button To remove the Grille from the Chassis DisassemblyTo remove the Control Box To remove the Motor Cover To remove the Control Box Before removing the Turbo Fan To remove the EvaporatorTo remove the Motor Electronic Control Device Schematic DiagramSplit Type Outdoor Outdoor Unit Schematic Diagram Art Cool Type Indoor Unit Wiring DiagramBottom View Components LocationsArt Cool Type Schematic Diagram Component side Solder side Refrigeration Cycle Diagram Troubleshooting GuideA3UH363FA0LMU360HE A3UC363FA0LMU360CEOutdoor Error Indoor ErrorError Indicator Self-diagnosis FunctionTrouble analysis Cycle Troubleshooting GuideProcedure Specification Remedy Electronic Parts Troubleshooting GuideProduct doesnt operate with the remote controller Check Point Comp. on Comp. OFF Compressor/Outdoor Fan are dont operate Nector Trouble 4 When indoor Fan does not operateTroubleshooting Guide Check Point Error CodeIndoor air sensor Indoor inlet pipe sensorCommunication line is shorted at GND Power input AC 230V.Outdoor, IndoorError Title Cause of error Check point & Normal condition Outdoor air sensor Title Cause of error Check point & Normal conditionCondensor pipe sensor Pipe sensorWay Valve Liguid Side Way, 3-way ValvePumping down ProcedureAir purging of the charge hose Set the liquid side valve to the closed positionEvacuation Mount the valve caps and the service port capsAll amount of refrigerant leaked Gas Charging Mount the valve stem nuts and the service port nutAfter Evacuation Connect the gauge to the charging cylinderS4, SE chassis Exploded View & Replacement Parts ListS4 chassis SE chassis Parts List S4, SE chassisLMN090HE SP3 Chassis Art Cool Type Filter ASSEMBLY,AIR Cleaner Parts List SP3 chassisA3UC363FA0LMU360CE Code Parts List A3UH363FA0LMU360HE, A3UC363FA0LMU360CEMay No A20474C