Electronic Parts Troubleshooting Guide - LG LP-E5020CL Service Manual

9.6 Electronic Parts Troubleshooting Guide

1) No cooling operation performed.
NO
ON/OFF S/W ON
Is the AC220V
(AC 240 V) between Connector(CN-
outunit) Pin 1 and Pin 3 of
Main P.C.B
NO
Is the unit operating?
YES
Is it Cooling mode?
YES
Room temp, > Set temp?
YES
Is the DC5V at 14
pin of MICOM
YES
Replacement IC02M, RY-COMP
YES
Is the input power
AC220V (AC240V) at COMP
Magnetic coil?
Check the magnetic
contactor of outdoor unit.
NO
Select the cooling
operation mode.
NO
Room temp, >set temp
setting
NO
Replacement MICOM
– 59 –
NO
YES
Check the wiring
diagram.