LG Electronics LS120HP(AS-H121E1H0) manual Compressor/Outdoor Fan are unable to drive.9k Model

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Troubleshooting Guide

Compressor/Outdoor Fan are unable to drive.(9k Model)

Turn on Main Power

Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 2°F at least.

When in Fan Mode, Compressor/Outdoor Fan is stopped.

Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).

When the sensor circuit for indoor temperature and connector are in bad connection or are not engaged, Compressor/Outdoor Fan is stopped.

Check the related circuit of R02H(12.1K), R04H(6.2K), Micom (No.27) (Indoor unit).

• Check the indoor temperature sensor is disconnected or not(About 10k/ at 77°F).

When the temperature around Outdoor PWB Ass'y is above 163°F the compressor is stop and only Outdoor Fan is operating.

Check Relay(RY - COMP) for driving compressor.

When the power(About AC110V) is applied to the connecting wire termi- nal support transferred to compressor, PWB Ass'y is normal.

Check the circuit related to the relay(Outdoor unit).

Check point

COMP ON

COMP OFF

Between Micom(No.

DC5V

DC0V

5) and GND

 

 

 

 

 

Between IC01M, IC02M(No. 9)

Below DC 1V

About DC12V

and IC01M, IC02M(No. 8)

(app)

 

 

 

 

Turn off Main Power

Check the electrical wiring diagram of outdoor side.

Check the abnormal condition for the component of Compressor/Outdoor Fan Motor.

Copyright ©2007 LG Electronics. Inc. All right reserved.

- 55 -

Only for training and service purposes

LGE Internal Use Only

 

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Contents SVC MANUALExploded View Table of Contents Be sure not to do Be sure to follow the instruction Safety PrecautionsInstallation Do not modify or extend the power cordOperation There is risk of explosion or fire Oxygen deficiency could occurLow refrigerant levels may cause product failure Keep level even when installing the productOn the product. outdoor unit OccupantsSalt spray directly Solvents, etcDo not drink the water drained from the unit DisuseReplace all the batteries in the remote Model Btu Series DimensionsSymbols Used in this Manual Indoor UnitModel Btu Series Dimension Mminch 109042.9 30011.8 1787.0 9k, 12k Outdoor Unit18k, 24k Introduction FeaturesRead carefully, and then follow step by step InstallationInstallation Parts Installation ToolsOperation Indication Lamps Installation MapAdditional drain pipe This Product Contains R-410A Refrigerant Confirm The RefrigerantOutdoor unit Rooftop InstallationsSelect The Best Location Indoor unitEvap Moz/ft Piping Length And ElevationDrill a Hole In The Wall How To Mount Installation PlatePutting nut on Flaring WorkCut the pipes and the cable Burrs removalIndoor unit installation Connecting The PipingIndoor Tighten the flare nut with a wrench Wrap the insulation material around the connecting portionIndoor unit installation Insert the connecting cable into the indoor unitConnecting cable Connection Indoor Incorrect case Correct caseConnection Of Piping -Outdoor Connection Of The Drain HoseCapacity Connection Of The CableInstallation Avoid these situations Checking The DrainageDrain piping Drain hose should point downward for easy drain flowForming The Piping Preparation Dry nitrogen gas cylinder to this service portAir Purging Air purging With Vacuum PumpFinishing the job EvacuationBtu/h ChargingEvaluation of the performance Prepare remote controlTest Running Settlement of outdoor unitFunction of Controls Cooling Mode OperationHealthy Dehumidification Mode OperationDefrost Control Heating Mode OperationJet Cool Mode Operation H/P Model Sleep Timer OperationChaos Natural Wind Mode Jet Cool Mode Operation C/O ModelProtection of the evaporator pipe from frosting Forced operationTest operation Auto restartThermistor open/short Display FunctionSelf-diagnosis Function Heating ModelRemote Control Operations To remove the Grille from the Chassis DisassemblyTo remove the Evaporator When repair, do not damage the Caution labelTo remove the Motor Cover Cooling & Heating Models Troubleshooting GuideRefrigeration Cycle Diagram Cooling Only ModelsWay Valve Liquid Side Way, 3-way ValvePumping Down ProcedureBalance Refrigerant of the 3-way Valve Vacuum pump After Evacuation Gas ChargingAdditional gas charging Method of using graphMethod of using equation According to Indoor & Outdoor TemperatureTrouble analysis Cycle PartsProduct does not operate at all Electronic Parts 9k modelElectronic Parts 18k model Product is not operate with the remote controller Compressor/Outdoor Fan are unable to drive.9k Model Compressor/Outdoor Fan are unable to drive.18k Model Nector When indoor Fan does not operateWhen Vertical Louver does not operate When a comunication error occurs Indoor Unit Phenomena in case of connecting errorOutdoor Unit Electric Control Device Schematic DiagramOutdoor 9k, 12k Outdoor 18k, 24k Models 9k, 12k, 18k, 24k Wiring DiagramModels 9kC/O Models 12kH/P, 12kC/O, H/P Models 18kC/O Models 18kH/P, 24kC/O, H/P Components Location Main P.W.B Assembly TOP View Bottom ViewTOP View Bottom View Outdoor9k, 12kOutdoor18k, 24k 6871A20680 6871A20681Cooling Only Product SpecificationsLS090HP LS120HP LS180HP LS240HP Cooling & HeatingExploded View Outdoor Unit 9k, 12k C/O Seriess Outdoor Unit 9k, 12k H/P Seriess Outdoor Unit 18kC/O Seriess W0CZZB Outdoor Unit 24kC/O SeriessOutdoor Unit 18k, 24k H/P Seriess No MFL32351801 December