Mitsubishi Electric MUZ-AY25VG Service Manual page 53

L Check of inverter P.C. board
Check the outdoor fan motor.
(Refer to 12-5. .)
Is the fuse (F901) blown on the inverter
P.C. board?
No
Check the connection of the connectors
(CN931, CN932) of the outdoor fan motor.
If the connection is poor, make it correct.
Operate the outdoor unit by starting
EMERGENCY OPERATION.
Check the LED indication on the
inverter P.C. board.
Does the LED blink 10 times?
Yes
(10-time blink)
Replace the inverter P.C. board.
OBH931
Yes
Check the corresponding parts
following LED indication.
No
(Refer to 12-3.)
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