LG Electronics LAU121CNM, LAN121CNM, LA121HPMI Phenomena in case of connecting error, Indoor Unit

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Troubleshooting Guide

The phenomena in case of connecting error

INDOOR UNIT

Connector Type

Condition

Phenomena

CN-DC/DC

Open and connecting error

• The same as the phenomenon of Outdoor Unit.

Blue

Black

Brown

Red

• The indoor fan does not operate.

CN-MOTOR

Open

• The operation indicator of Indoor unit blinks 8 times.

Open

• The up/down vane does not operate.

CN-UP/DOWN

Short between terminals

• The up/down vane does not smoothly operate.

CN-DISP

Open

• It does not operate with a remote controller.

• The operation indicator blinks once.

On for 0.5 second

Open

Off for 3 seconds

• The compressor and the outdoor fan stop.

• The indoor fan speed is low.

CN-TH

• The operation indicator blinks once

Short between terminals

(on for 0.5 second, off for 3 seconds).

• The compressor operates continuously regardless

(

and

) CN-TH2.

of the setting temperature and the variation of room

temperature.

Short between terminals

• The operation indicator blinks once

(

and

) CN-TH1.

(on for 0.5 second, off for 3 seconds)

• Continuous operation

56Room Air Conditioner

Image 56

Contents Room Air Conditioner Table of Contents Safety Precautions InstallationDo not modify or extend the power cord Be sure not to do Be sure to follow the instructionOperation Moisture may condense and wet or damage furnishings Keep level even when installing the product Do not direct airflow at room occupants Do not block the inlet or outlet of air flowReplace all the batteries in the remote DisuseDo not drink the water drained from the unit Indoor Unit DimensionsSymbols Used in this Manual Outdoor Unit 12kFeatures IntroductionInstallation Tools InstallationInstallation Parts Installation Map Bushing-SleeveConfirm The Refrigerant This Product Contains R-410A RefrigerantOutdoor unit Rooftop InstallationsIndoor unit Piping Length and Elevation How to Mount Installation Plate Drill a Hole In The WallFlaring Work Cut the pipes and the cableBurrs removal Putting nut onIndoor Connecting The PipingIndoor unit installation Wrap the insulation material around the connecting portion Tighten the flare nut with a wrenchInsert the connecting cable into the indoor unit Indoor unit installationPiping for passage through piping hole Correct case Incorrect caseConnection of The Drain Hose Connection of Piping -OutdoorWiring Diagram Connection of The CableFront panel removing How to use the front panel Front panel openingFront panel closing Checking The Drainage Drain pipingForming The Piping Air Purging Air purging With Vacuum PumpPreparation Leak testEvacuation Finishing the jobCharging Prepare remote control Test RunningSettlement of outdoor unit Evaluation of the performanceCooling Mode Operation Healthy Dehumidification ModeOperation Function of ControlsHeating Mode Operation Defrost ControlSleep Timer Operation Chaos Natural Wind ModeJet Cool Mode Operation C/O Model Jet Cool Mode Operation H/P ModelForced operation Test operationAuto restart Protection of the evaporator pipe from frostingHeating Model Display FunctionSelf-diagnosis Function Remote Control Operations Operation ModeDisassembly To remove the Grille from the ChassisTo remove the Control Box To remove the Motor Cover Troubleshooting Guide Refrigeration Cycle DiagramCooling Only Models Cooling & Heating ModelsWay, 3-way Valve Way Valve Liquid SideProcedure Pumping DownBalance Refrigerant of the 3-way Valve Vacuum pump Gas Charging After EvacuationMethod of using graph Method of using equationAccording to Indoor & Outdoor Temperature Additional gas chargingCycle Parts Trouble analysisElectronic Parts Product does not operate at allProduct is not operate with the remote controller Compressor/Outdoor Fan are unable to drive When indoor Fan does not operate NectorWhen Vertical Louver does not operate When a comunication error occurs Phenomena in case of connecting error Indoor UnitOutdoor Unit Schematic Diagram Electric Control DeviceOutdoor 12k Wiring Diagram Models 12kModels 12kC/O Models 12kH/P Components Location Outdoor12k 6871A00087B 6871A00088A6871A20259D 6306A90009AProduct Specifications Cooling OnlyCooling & Heating E.R P.EExploded View Outdoor Unit 12k Btu/h Seriess W0CZZReplacement Parts List Parts List IndoorParts List Outdoor No. MFL31443001

LA121HPMI, LAU121CNM, LAN121CNM, LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, LA121CPMO specifications

LG Electronics has established itself as a leader in innovative home appliance technologies, particularly in the air conditioning segment. The LG LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, and LA121CPMO models exemplify the blend of efficiency, comfort, and advanced features that LG is known for.

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In conclusion, the LG LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, and LA121CPMO air conditioning models are exemplary products that demonstrate LG’s commitment to quality, efficiency, and user-centric design. With cutting-edge technology and a focus on sustainability, these units cater to the needs of modern consumers while ensuring comfort all year round.