31
Check of indoor electronic control P.C. board
C
Check of outdoor unit
D
Compressor and outdoor fan do not operate.
Start
Press the EMERGENCY
OPERATION switch. 3-minute time
delay works. Test run operation
operates for 30 minutes.
Check the outdoor DEICER P.C. board and the
compressor contactor at first, then check the
outdoor fan motor and compressor.
Check the continuity of indoor and outdoor unit
connection.
No
No
Yes
Yes
Check the voltage to the
terminal block of indoor
unit. Is there 220-240V
AC to the terminal block
between
2
-
N
?
Check the voltage to the
terminal block of outdoor
unit. Is there 220-240V
AC to the terminal block
between
2
-
N
?
Check the indoor electronic control P.C.board.
The unit doesn’t operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.
Replace the fuse.
Replace the indoor electronic
control P.C. board.
Replace the varistor.
Yes
No
Check both “parts side” and “pattern
side” of indoor electronic control P.C.
board visually.
No
Is varistor(NR11)burnt?
Yes
Is fuse(F11)blown?
Be sure to check both fuse
and varistor in any case.
