LG Electronics LF300CP(LP-C303R20), LF480CE(LP-C483TA0) service manual Unit does not operate

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5) The unit does not operate.

Is the AC220V	NO
(240V) at Trans input terminal?
(240V) at Trans input terminal?

YES

Is the AC12-18V at	NO
Trans (2nd)?

YES

Is the connector of	NO
Main/Display correct?

YES

Is the DC5V between PIN64	NO
and PIN 32 of MICOM?

YES

Replacement Main PCB ASM

1.Check the electric connections

2.Check the fuse of Main PCB ASM

Replacement Trans

Check the connector of

Main/Display

1.Replacement ICO3D

2.Replacement Main PCB ASM

6) Timer control does not operate. Replacement Micom

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Contents Floor Standing Type Air Conditioner Model LF300CPLP-C303R20 LF480CELP-C483TA0Contents Safety Precautions InstallationDefective installation stand Do not install, remove, or reDo not install the product on a OperationalBe cautious that water could not enter the product Do not step on or put anyting on the product. outdoor units Keep level even when installing the productUse two or more people to lift and transport the product Functions Indoor UnitFan Operation Remote ControlTimer Control Airflow Direction ControlOutdoor Fan Speed Control Outdoor UnitDeice Control Product Specifications CapacityOutdoor Unit LPUC303R20 LF300CP DimensionsIndoor Unit LPNC303R20 LF300CP Indoor Unit Outdoor UnitIndoor Unit LPNC483TA0 LF480CE Door Unit LPUC483TA0 LF480CEItems Air Outlet Vent Air Inlet Vent Control display Wiring Diagram OutdoorLF480CELP-C483TA0 Outdoor Off Timer Function Time Delay Safety ControlCooling Mode Operation Operation DetailsHeating Mode Operation Hot-Start Control Defrost ControlAir Purifying OperationAP-Z286RC0, AP-Z286R20, AP-Z488TC0 Soft Dry Operation ModeProtection of the evaporator pipe from frosting Child Lock functionAlarm mode display / only displayed while operating Energy SavingOutline of Operation Operation or CancelFunction for test operation FunctionCooling Only Model Installation of Indoor, Outdoor UnitSelection of the best location Refrigerant amount Indoor Unit installationOutdoor unit Installation Evaluation of the performance Connection of power supplyTest running Operate the unit for fifteen minutes or moreHand Over Troubleshooting Guide Failures to StartNo cooling and heating operation performed Only blowers do not workOnly outdoor fan does not work Only compressor does not workUnits discontinue after the operation started Unit is working, but not cooling and heating sufficiently Both blower and compressor are workingFault Cause Check/Correcitve Action Trouble checking by protection devicesCause for frequent stop and start operation Electronic Parts Troubleshooting Guide No cooling operation performedIndoor fan does not operate Airflow Direction does not operate Remote control does not operate Timer control does not operate. Replacement Micom Unit does not operateNo heating operation works No heater operation works Exploded View and Replacement Parts List Model LF300CPLP-C303R20W1WE Model LF480CELP-C483TA0 W0CZZ 435512 559010 546810 554030 Model LF480CELP-C483TA0 December No A20156T