LG Electronics AMNH123DEA0(LMN120HE) service manual Cycle Troubleshooting Guide, Trouble analysis

Page 66

Troubleshooting Guide

CycleTroubleshooting Guide

Trouble analysis

1. Check temperature difference between intake and discharge air, and operating current.

Temp. Difference

Operating Current

 

Temp. difference

: approx. 0°C(32°F)

 

Current

: less than 80% of

 

 

 

rated current

 

 

 

 

 

 

 

Temp. difference

: approx. 8°C(46.4°F)

 

Current

: less than 80% of

 

 

rated current

 

 

 

 

 

 

 

Temp. difference

: less than 8°C(46.4°F)

 

Current

: near the rated cur-

 

 

 

rent

 

 

 

All amount of refrigerant leaked out. Check refrigeration cycle.

Refrigerant leakage

Clog of refrigeration cycle

Defective compressor

Excessive amount of refrigerant

Temp. difference : over 8°C(46.4°F)

Normal

Notice:

Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Suction pressure

Temperature

 

 

(Compared with

(Compared with

Cause of Trouble

Description

the normal value)

the normal value)

 

 

 

 

 

 

 

High

Defective compressor

Current is low.

Higher

 

 

 

Normal

Excessive amount of

High pressure does not quickly

 

 

 

refrigerant

rise at the beginning of operation.

 

 

 

 

 

 

Insufficient amount of

Current is low.

Lower

Higher

refrigerant(Leakage)

 

 

 

Clogging

 

 

 

 

 

Notice:

1.The suction pressure is usually 4.5~6.0 kg/cm2G at normal condition.

2.The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty.

66Multi type Air Conditioner

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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 tableBe sure not to do Be sure to follow the instruction Safety PrecautionsInstallation Control box securely Cuit and breakerBe sure the installation area does not deteriorate with age Do not place anything on the power cableBe cautious when unpacking OperationSmoke comes from product Nect the power supply cableDo not allow water to run into electric parts Hurricane arrivesInstalling the product When the product is soakedInstall the drain hose to ensure that Keep level even when Not enter the productVents, etc OperationalAir flow Not use harsh detergents, solDo not step on or put anyting on the product. outdoor units Ly. Clean the filter every twoWhen cleaning or maintaining 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 Remove cover pipe and cover side Preparing work for Installation Artcool Type OnlyOpen panel front Drain hose junctionDrill a hole in the wall Sticking the installation guide map and fixing Indoor unitPut an Installation Guide Map on the desired surface 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 Preparation Air Purging and EvacuationChecking method Leakage testRepeat evacuation procedure for each indoor unit EvacuationFinishing the job Charging AdditionalTest Running Split, Art Cool TypeHeating Mode Operation Cooling Mode OperationSoft Dry Operation Mode OperationDefrost ControlHeating Fuzzy OperationFuzzy Operation for Cooling Airflow Speed Selection On-Timer OperationOff-Timer Operation Fuzzy Operation for DehumidificationChaos Swing Mode Off-Timer = On-Timer OperationSleep Timer Operation Chaos Natural Wind ModeForced Operation Buzzer Sounding OperationFunction of Indoor Unit Split Type Indoor UnitOperation IndicatorArt Cool Type Indoor Unit 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 A3UH363FA0LMU360HE Troubleshooting GuideRefrigeration Cycle Diagram A3UC363FA0LMU360CEError Indicator Indoor ErrorOutdoor Error 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 Indoor air sensor Error CodeCheck Point Indoor inlet pipe sensorPower input AC 230V.Outdoor, Indoor Communication line is shorted at GNDError Title Cause of error Check point & Normal condition Condensor pipe sensor Title Cause of error Check point & Normal conditionOutdoor air sensor Pipe sensorWay, 3-way Valve Way Valve Liguid SideAir purging of the charge hose ProcedurePumping down Set the liquid side valve to the closed positionMount the valve caps and the service port caps EvacuationAll amount of refrigerant leaked After Evacuation Mount the valve stem nuts and the service port nutGas Charging 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

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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