LG Electronics A3UC363FA0(LMU360CE), AMNH123DEA0(LMN120HE) service manual Function of Outdoor Unit

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Operation

FunctionofOutdoor Unit

Outdoor Unit

Two Comp algorithm

• Inverter Comp is first priority and then Constant Comp is turning on responding to load condtion.

Operating Step

•Compressor step varies considering condition such as room temp,outdoor temp, operating room number,Temp gap between room temp and set temp and so on.

LEV Control

• LEV pulse is modulated to keep constant superheat or subcooling.

Out door Fan Control

• Outdoor fan operates at High or Off to respond to the load condition.

R/Valve Control(Heating Model Only)

• Convert R/Valve to change cooling to heating, heating to cooling.

Defrost Function

• After 45 min heating operation, check the defrost condition and if outdoor pipe temp is below -

5° C(23° F) and released from deice operation in case outdoor pipe temp is over 12° C(53.6° F) or 9 min cooing mode.

• To deice outdoor heat exchanger in low temp condtion, convert operating mode from heating to

Oil Return System

• In single(one) comp operation duration, another comp will operate for 30 seconds every 1 hours.

Comp Overload Protection

• To protect comp from being overload, protector will turn off the comp.

High Pressure Protction

• If cycle pressure is too high(around 36.7 kgf/cm2), it will turn off comp A

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Contents Outdoor Unit A3UH363FA0LMU360HE A3UC363FA0LMU360CE Indoor Unit Room Type Art Cool TypeTable of Contents Outdoor Unit Model Number NomenclatureIndoor Unit Combination table Symbols Used in this ManualControl box securely Cuit and breaker Safety PrecautionsInstallation Be sure not to do Be sure to follow the instructionOperation Do not place anything on the power cableBe cautious when unpacking Be sure the installation area does not deteriorate with ageHurricane arrives Nect the power supply cableDo not allow water to run into electric parts Smoke comes from productNot enter the product When the product is soakedInstall the drain hose to ensure that Keep level even when Installing the productNot use harsh detergents, sol OperationalAir flow Vents, etcDo not drink the water drained from the product Ly. Clean the filter every twoWhen cleaning or maintaining Do not step on or put anyting on the product. outdoor unitsSplit Type Indoor DimensionsIndoor Unit Outdoor Unit Indoor Unit Product SpecificationsModel A3UC363FA0LMU360CE A3UH363FA0LMU360HE Outdoor Unit Multiple piping modelsInstallation Tools InstallationInstallation Parts Outdoor unit Rooftop InstallationsSelect the best location Multi Piping Type Piping length and elevationFixing Installation PlateStandard Type Drain hose junction Preparing work for Installation Artcool Type OnlyOpen panel front Remove cover pipe and cover sideDrive the fore plastic anchors into drilled points Sticking the installation guide map and fixing Indoor unitPut an Installation Guide Map on the desired surface Drill a hole in the wallFlaring work Flaring Work and Connection of PipingIndoor Connecting the PipingCheck 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 Drain piping Checking the drainageTo check the drainage Forming the piping Leakage test Air Purging and EvacuationChecking method PreparationFinishing the job Repeat evacuation procedure for each indoor unitEvacuation Additional ChargingSplit, Art Cool Type Test RunningOperation Cooling Mode OperationSoft Dry Operation Mode Heating Mode OperationFuzzy Operation for Cooling Defrost ControlHeatingFuzzy Operation Fuzzy Operation for Dehumidification On-Timer OperationOff-Timer Operation Airflow Speed SelectionChaos Natural Wind Mode Off-Timer = On-Timer OperationSleep Timer Operation Chaos Swing ModeBuzzer Sounding Operation Forced OperationSplit Type Indoor Unit Function of Indoor UnitDefrostDeice control Heating IndicatorArt Cool Type Indoor Unit OperationFunction of Outdoor Unit 15 2nd F Button Remote Control OperationCooling Model , Heat Pump Model To remove the Grille from the Chassis DisassemblyTo remove the Control Box To remove the Motor Cover To remove the Control Box To remove the Motor To remove the EvaporatorBefore removing the Turbo Fan Split Type Schematic DiagramElectronic Control Device Outdoor Outdoor Unit Schematic Diagram Art Cool Type Indoor Unit Wiring DiagramBottom View Components LocationsArt Cool Type Schematic Diagram Component side Solder side A3UC363FA0LMU360CE Troubleshooting GuideRefrigeration Cycle Diagram A3UH363FA0LMU360HESelf-diagnosis Function Indoor ErrorOutdoor Error Error IndicatorTrouble 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 operateNector Trouble 4 When indoor Fan does not operateTroubleshooting Guide Indoor inlet pipe sensor Error CodeCheck Point Indoor air sensorCommunication line is shorted at GND Power input AC 230V.Outdoor, IndoorError Title Cause of error Check point & Normal condition Pipe sensor Title Cause of error Check point & Normal conditionOutdoor air sensor Condensor pipe sensorWay Valve Liguid Side Way, 3-way ValveSet the liquid side valve to the closed position ProcedurePumping down Air purging of the charge hoseAll amount of refrigerant leaked Mount the valve caps and the service port capsEvacuation Connect the gauge to the charging cylinder Mount the valve stem nuts and the service port nutGas Charging After EvacuationS4, SE chassis Exploded View & Replacement Parts ListLMN090HE Parts List S4, SE chassisS4 chassis SE chassis SP3 Chassis Art Cool Type Filter ASSEMBLY,AIR Cleaner Parts List SP3 chassisA3UC363FA0LMU360CE Code Parts List A3UH363FA0LMU360HE, A3UC363FA0LMU360CEMay No A20474C

A3UH363FA0(LMU360HE), AMNC123DEA0(LMN120CE), AMNC093D4A0(LMN090CE), AMNH123DEA0(LMN120HE), A3UC363FA0(LMU360CE) specifications

LG Electronics is renowned for its innovation in the home appliance sector, particularly in air conditioning systems. Among its diverse range, the AMNC123APM0, A3UC363FA0, AMNH123DEA0, AMNC093D4A0, and AMNC123DEA0 model series stand out for their advanced features and energy efficiency.

The AMNC123APM0, also referred to as LMAN120CNS, offers a powerful air conditioning solution ideal for medium to large spaces. Featuring a sleek design, it combines aesthetics with functionality. This model utilizes LG's inverter technology, which helps maintain a consistent temperature while significantly reducing energy consumption. Additionally, it comes equipped with a dual inverter compressor that operates quietly, making it perfect for residential settings.

The A3UC363FA0, or LMU360CE, is another standout model that caters to the installation needs of multi-zone systems. Its flexibility allows users to connect multiple indoor units, ensuring efficient air distribution across different spaces. This model also features advanced filtration systems that improve indoor air quality by reducing allergens and other harmful particles.

AMNH123DEA0, branded as LMN120HE, introduces enhanced energy efficiency through its intelligent energy management systems. This unit is designed with user-friendly controls and smart technology to optimize performance based on user preferences. Its compact design makes it suitable for smaller spaces while still delivering powerful cooling and heating functions.

The AMNC093D4A0, known as LMN090CE, is perfect for residential applications where space is a consideration. It boasts a high SEER (Seasonal Energy Efficiency Ratio) rating, indicating low energy consumption while still providing optimal cooling. The model is equipped with a variety of operational modes, including dehumidification and fan-only options.

Finally, the AMNC123DEA0, or LMN120CE, rounds out this impressive series by offering versatile installation options and silent operation. This model is particularly noted for its robust cooling capabilities and ease of maintenance, ensuring that homeowners can enjoy year-round comfort with minimal disruption.

In summary, LG Electronics has blended efficiency, performance, and design in its latest air conditioning models. With features like inverter technology, multi-zone capabilities, advanced filtration, and quiet operation, these systems cater to modern home cooling and heating requirements while promoting energy conservation. As such, they represent a significant leap in HVAC technology, providing reliable comfort and improved indoor air quality.
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