Sinclair SYMPHONY MS-H09AISW PT Service Manual page 30

2. Malfunction of Blocked Protection of IDU Fan Motor H6
Whether the
blade can operate
smoothly
wiring terminal between
Energize and restart up the
unit, test whether the voltage beween black
terminal and white terminal of motor
interface is 280~310VDC
Test whether the voltage bewween
black terminal and white terminal of motor
interface is 15VDC
Test whether there's voltage signal
beween black terminal and yellow
terminal of motor interface
start
Pull the blade by
hand under
de-energization
status
Yes
Check whether the
indoor fan and main
board is loose
No
No
Yes
Yes
Yes
It's the malfunction
of motor. Replace
the motor.
Adjust the motor and
blade assembly to let
No
the motor can operate
smoothly
the malfunction is elliminated
No
Reinsert the wiring
Yes
terminal of indoor fan
the malfunction is elliminated
It's the malfunction of main board.
No
Replace the main board with
the same model
It's the malfunction of main board.
No
Replace the main board with
the same model
It's the malfunction of main board.
No
Replace the main board with
the same model
Check whether
after energization
Check whether
Yes
after energization
END
Yes
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