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