Electronic Parts Troubleshooting Guide

1) No cooling operation performed.

Is the AC220V

(AC 240 V) between Connector(CN-

outunit) Pin 1 and Pin 3 of

Main P.C.B

NO

NO

Is the unit operating?

 

YES

ON/OFF S/W ON

Is it Cooling mode?

YES

Room temp, > Set temp?

YES

YES

Is the input power

AC220V (AC240V) at COMP

Magnetic coil?

YES

Check the magnetic contactor of outdoor unit.

NO

Select the cooling operation mode.

NO

Room temp, >set temp setting

NO

Check the wiring diagram.

Is the DC5V at 14

NO

pin of MICOM

 

YES

Replacement IC02M, RY-COMP

Replacement MICOM

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LG Electronics LF300CP(LP-C303R20), LF480CE(LP-C483TA0) service manual Electronic Parts Troubleshooting Guide