LG Electronics A2UH243FA0(LMU240HE) service manual Function of control, Cooling Mode Operation

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Operation

Operation

Functionofcontrol

1. MAIN UNIT FUNCTION

•DISPLAY

Operation Indicator

•On while in appliance operation, off while in appliance pause

•Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)

Sleep Timer Indicator

•On while in sleep timer mode, off when sleep timer cancel or appliance operation pause

Timer Indicator

•On while in timer mode (on/off), off when timer mode is completed or canceled

Defrost Indicator

•Off except when hot start during heating mode operation or while in defrost control

■Cooling Mode Operation

•When the intake air temperature reaches 0.5°C(32.9°F) below the setting temp, the compressor and the outdoor fan stop.

•When it reaches 0.5°C(32.9°F) above the setting temp, they start to operate again.

Compressor ON Temp

➲ Setting Temp+0.5°C(32.9°F)

Compressor OFF Temp

➲ Setting Temp-0.5°C(31.1°F)

•While in compressor running, operating with the airflow speed set by the remote control. While compressor is off fan operates at low speed regardless of the setting.

■Soft Dry Operation Mode

•When the dehumidification operation input by the remote control is received, the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature.

26°C(78.8°F) ≤ Intake Air Temp

➲ 25°C(77°F)

24°C(75.2°F) ≤ Intake Intake Air Temp<26°C(78.8°F)

➲ Intake Air Temp-1°C(30.2°F)

18°C(64.4°F) ≤ Intake Intake Air Temp<24°C(75.2°F)

➲ Intake Air Temp-0.5°C(31.1°F)

Intake Air Temp<18°C(64.4°F)

➲ 18°C(64.4°F)

•While compressor off, the indoor fan repeats low airflow speed and stop.

•While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification operation and 4-min compressor off repeat.

Compressor ON Temp. ➲ Setting Temp+0.5°C(32.9°F) Compressor OFF Temp. ➲ Setting Temp-0.5°C(31.1°F)

•In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

■Heating Mode Operation

•When the intake air temp reaches +3°(37.4°F)…above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.

Compressor ON Temp. ➲ Setting Temp. Compressor OFF Temp. ➲ Setting Temp.+3°C(37.4°F)

•While compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C(68°F), when above

27°C(80.6°F) , it operates with the low or setting speed. When the indoor pipe temp is between 20°C(68°F) and

40Multi type Air Conditioner

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Contents Multi Type Air Conditioner Indoor Unit Room Type Art Cool TypeTable of Contents Indoor Unit Model Number NomenclatureOutdoor 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 productIndoor Unit DimensionsSplit Type Indoor Outdoor Unit Product Specifications Indoor UnitOutdoor Unit Multiple piping models Model A2UC243FA0LMU240CE A2UH243FA0LMU240HEInstallation Parts InstallationInstallation Tools Select the best location Rooftop InstallationsOutdoor unit Multi Piping Type Piping length and elevation24k Fixing 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 workCheck Connecting the PipingIndoor Wrap the insulation material around the connecting por- tion For left rear piping 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 terminalsAttach the Grille onto the cabinet To check the drainage Checking the drainageDrain piping Forming the piping Air Purging and Evacuation Checking methodPreparation Leakage testEvacuation Repeat evacuation procedure for each indoor unitFinishing the job Charging AdditionalTest Running Split, Art Cool TypeCooling Mode Operation Soft Dry Operation ModeHeating Mode Operation OperationFuzzy Operation Defrost ControlHeatingFuzzy 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 Cooling Model , Heat Pump Model Remote Control Operation15 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 Before removing the Turbo Fan To remove the EvaporatorTo remove the Motor Electronic Control Device Schematic DiagramSplit Type Outdoor TMP87CM41F RY-4WAY RY-LIQ RY-GAS RY-FANL RY-FANH Wiring Diagram Art Cool Type Indoor UnitComponents Locations Bottom ViewArt Cool Type Schematic Diagram Component side Solder side Troubleshooting Guide Refrigeration Cycle DiagramA2UH243FA0LMU240HE A2UC243FA0 LMU240CEIndoor 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 positionEvacuation Mount the valve caps and the service port capsAll 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 chassisS4 chassis SE chassis Parts List S4, SE chassisLMN090HE SP3 Chassis Art Cool Type Parts List SP3 chassis Filter ASSEMBLY,AIR CleanerA2UC243FA0 LMU240CE Location Parts List A2UH243FA0LMU240HE, A2UC243FA0 LMU240CEDescription April No A20462Z

AMNC093APM0(LMAN090CNS), AMNH123DEA0 (LMN120HE), A2UC243FA0 (LMU240CE), AMNH123APM0(LMAN120HNS), A2UH243FA0(LMU240HE) specifications

LG Electronics has established a prominent position in the HVAC (heating, ventilation, and air conditioning) market with its diverse range of air conditioning units, including models AMNH123APM0 (LMAN120HNS), AMNH123DEA0 (LMN120HE), AMNC123DEA0 (LMN120CE), A2UH243FA0 (LMU240HE), and A2UC243FA0 (LMU240CE). Each of these models is designed to provide efficient cooling and heating solutions, boasting advanced technologies and user-friendly features.

The AMNH123APM0 (LMAN120HNS) model stands out for its energy efficiency, thanks to its inverter technology that adjusts power consumption according to the cooling or heating demand. This feature not only reduces energy costs but also enhances the lifespan of the unit. Additionally, its compact design allows for easy installation in various residential or commercial settings.

Similarly, the AMNH123DEA0 (LMN120HE) offers robust performance with its variable-speed compressor technology. This model ensures precise temperature control and minimal fluctuations, promoting comfort throughout the space. The unit also incorporates a quiet operation mode, making it ideal for bedrooms or offices where noise levels need to be minimized.

The AMNC123DEA0 (LMN120CE) is another compelling choice, featuring a sleek design that fits seamlessly into any décor. It operates efficiently in various weather conditions, maintaining a consistent indoor climate year-round. Its smart diagnostic system simplifies maintenance, allowing for timely troubleshooting and ensuring long-term reliability.

For larger spaces, the A2UH243FA0 (LMU240HE) and A2UC243FA0 (LMU240CE) models provide effective solutions with their powerful cooling and heating capacities. These units are equipped with multi-zone capabilities, allowing users to customize temperatures for different areas of a building. The advanced filtration system in these models captures dust and allergens, improving indoor air quality.

Another noteworthy feature across these models is their SmartThinQ technology, which enables users to control their systems remotely via a smartphone app. This feature not only adds convenience but also facilitates energy management by allowing users to monitor and adjust settings on the go.

In conclusion, LG Electronics offers a range of HVAC solutions with its AMNH123APM0, AMNH123DEA0, AMNC123DEA0, A2UH243FA0, and A2UC243FA0 models. With energy-efficient technology, user-friendly features, and advanced performance capabilities, these air conditioning units are designed to meet the diverse cooling and heating needs of modern consumers while ensuring environmental sustainability.
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