LG Electronics AMNH123DEA0(LMN120HE) service manual Error Code, Check Point, Indoor air sensor

Page 72

Troubleshooting Guide

ErrorCode

■Trouble Shooting

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

			• Open / Short	Normal resistor : 10KΩ / at 25°C (Unplugged)
	01	Indoor air sensor	• Soldered poorly	Normal resistor : 10KΩ / at 25°C (Unplugged)
	01	Indoor air sensor	• Soldered poorly	Normal voltage : 2.5Vdc / at 25°C (plugged)
			• Internal circuit error	Normal voltage : 2.5Vdc / at 25°C (plugged)
			• Internal circuit error

			• Open / Short	Normal resistor : 5KΩ	/ at 25°C (Unplugged)
	02	Indoor inlet pipe sensor	• Soldered poorly	Normal resistor : 5KΩ	/ at 25°C (Unplugged)
	02	Indoor inlet pipe sensor	• Soldered poorly	Normal voltage : 2.5Vdc / at 25°C (plugged)
			• Internal circuit error	Normal voltage : 2.5Vdc / at 25°C (plugged)
			• Internal circuit error

			• Open / Short	Normal resistor : 5KΩ	/ at 25°C (Unplugged)
	06	Indoor outlet pipe sensor	• Soldered poorly	Normal resistor : 5KΩ	/ at 25°C (Unplugged)
	06	Indoor outlet pipe sensor	• Soldered poorly	Normal voltage : 2.5Vdc / at 25°C (plugged)
			• Internal circuit error	Normal voltage : 2.5Vdc / at 25°C (plugged)
			• Internal circuit error

10KΩ

Ω

2.5Vdc

V

Check the resistance / voltage

❑Check Point

1.Unplug the sensor on Indoor unit PCB.

2.Estimate the resistance of each sensor

3. If the resistance of the sensor is 10KΩ /5KΩ at 25°C, then sensor is normal

4.If the resistance of the sensor is 0 KΩ or ∞ , then sensor is abnormal. ➔ Change the sensor.

5.Plug the sensor on Indoor unit PCB and Power ON.

6.Estimate the voltage of each sensor.

7.If the voltage of the sensor is 2.5Vdc / at 25°C, then sensor is normal.

8.If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. ➔ Repair or Change the PCB

72Multi type Air Conditioner

Image 72

Contents Indoor Unit Room Type Art Cool Type Outdoor Unit A3UH363FA0LMU360HE A3UC363FA0LMU360CETable of Contents Model Number Nomenclature Indoor UnitOutdoor Unit Symbols Used in this Manual Combination tableSafety Precautions InstallationBe sure not to do Be sure to follow the instruction Control box securely Cuit and breakerDo not place anything on the power cable Be cautious when unpackingBe sure the installation area does not deteriorate with age OperationNect the power supply cable Do not allow water to run into electric partsSmoke comes from product Hurricane arrivesWhen the product is soaked Install the drain hose to ensure that Keep level even whenInstalling the product Not enter the productOperational Air flowVents, etc Not use harsh detergents, solLy. Clean the filter every two When cleaning or maintainingDo not step on or put anyting on the product. outdoor units Do not drink the water drained from the productDimensions Indoor UnitSplit Type Indoor Outdoor Unit Product Specifications Indoor UnitOutdoor Unit Multiple piping models Model A3UC363FA0LMU360CE A3UH363FA0LMU360HEInstallation Installation PartsInstallation Tools Rooftop Installations Select the best locationOutdoor unit Piping length and elevation Multi Piping TypeFixing Installation PlateStandard Type Preparing work for Installation Artcool Type Only Open panel frontRemove cover pipe and cover side Drain hose junctionSticking the installation guide map and fixing Indoor unit Put an Installation Guide Map on the desired surfaceDrill a hole in the wall Drive the fore plastic anchors into drilled pointsFlaring Work and Connection of Piping Flaring workConnecting the Piping CheckIndoor Wrap the insulation material around the connecting por- tion For left rear piping Plastic bands Insulation material Connection Indoor Panel AssemblyArt Cool Type only Drive two screwsGood case Bad caseRemote Control Preparationoptional Outdoor Outdoor unitConnecting the Cable between Indoor Unit and Outdoor Unit Connect the cable to the Indoor unitConnect the cable to the Outdoor unit Outdoor unitConnection method of the connecting cableExample How to connect wiring to the terminalsConnect the cable to the indoor unit Checking the drainage To check the drainageDrain piping Forming the piping Air Purging and Evacuation Checking methodPreparation Leakage testRepeat evacuation procedure for each indoor unit EvacuationFinishing the job Charging AdditionalTest Running Split, Art Cool TypeCooling Mode Operation Soft Dry Operation ModeHeating Mode Operation OperationDefrost ControlHeating Fuzzy OperationFuzzy Operation for Cooling On-Timer Operation Off-Timer OperationAirflow Speed Selection Fuzzy Operation for DehumidificationOff-Timer = On-Timer Operation Sleep Timer OperationChaos Swing Mode Chaos Natural Wind ModeForced Operation Buzzer Sounding OperationFunction of Indoor Unit Split Type Indoor UnitIndicator Art Cool Type Indoor UnitOperation DefrostDeice control HeatingFunction of Outdoor Unit Remote Control Operation Cooling Model , Heat Pump Model15 2nd F Button Disassembly To remove the Grille from the ChassisTo remove the Control Box To remove the Motor Cover To remove the Control Box To remove the Evaporator Before removing the Turbo FanTo remove the Motor Schematic Diagram Electronic Control DeviceSplit Type Outdoor Outdoor Unit Schematic Diagram Wiring Diagram Art Cool Type Indoor UnitComponents Locations Bottom ViewArt Cool Type Schematic Diagram Component side Solder side Troubleshooting Guide Refrigeration Cycle DiagramA3UH363FA0LMU360HE A3UC363FA0LMU360CEIndoor Error Outdoor ErrorError Indicator Self-diagnosis FunctionCycle Troubleshooting Guide Trouble analysisElectronic Parts Troubleshooting Guide Procedure Specification RemedyProduct doesnt operate with the remote controller Compressor/Outdoor Fan are dont operate Check Point Comp. on Comp. OFFTrouble 4 When indoor Fan does not operate NectorTroubleshooting Guide Error Code Check PointIndoor air sensor Indoor inlet pipe sensorPower input AC 230V.Outdoor, Indoor Communication line is shorted at GNDError Title Cause of error Check point & Normal condition Title Cause of error Check point & Normal condition Outdoor air sensorCondensor pipe sensor Pipe sensorWay, 3-way Valve Way Valve Liguid SideProcedure Pumping downAir purging of the charge hose Set the liquid side valve to the closed positionMount the valve caps and the service port caps EvacuationAll amount of refrigerant leaked Mount the valve stem nuts and the service port nut Gas ChargingAfter Evacuation Connect the gauge to the charging cylinderExploded View & Replacement Parts List S4, SE chassisParts List S4, SE chassis S4 chassis SE chassisLMN090HE SP3 Chassis Art Cool Type Parts List SP3 chassis Filter ASSEMBLY,AIR CleanerA3UC363FA0LMU360CE Parts List A3UH363FA0LMU360HE, A3UC363FA0LMU360CE CodeMay No A20474C