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119 PB
TROUBLESHOOTING
9-12k Malfunction of blocked Protection of IDU Fan Motor H6
End
No
Yes
No
Yes
No
Yes
Connect power and restart the unit.
Test whether the voltage between terminal 1 and terminal 2
of motor interface is within 280~310VDC.
Yes
No
No
No
Yes
Then check whether there is voltage
between terminal 2 and terminal 4
of the motor interface.
Yes
Yes
No
Whether the fan blades
can run smoothly?
Turn the fan blades
by hand under
power-off condition
Adjust the motor and blade
assembly so that rotor can run
smoothly.
Under power-off condition,
check whether the wiring terminal
between
indoor fan and main
board is loose.
Turn unit on
to check whether the
malfunction is
eliminated.
Turn unit on
to check whether the
malfunction is
eliminated.
Reinsert the wiring
terminal of indoor fan.
It's the malfunction of main board.
Replace a new main board that is
of the same model.
It's the malfunction of main board.
Replace a new main board that is
of the same model.
It's the malfunction of main board.
Replace a new main board that is
of the same model.
Then check whether the voltage
between terminal 2 and terminal 3
of the motor interface is 15VDC.
It's the malfunction of motor.
Replace a new motor that is
of the same model.
Start
2. Malfunction of Blocked Protection of IDU Fan Motor H6
Main detection points:
● SmoothlyIs the control terminal of PG motor connected tightly?
● SmoothlyIs the feedback interface of PG motor connected tightly?
● The fan motor cant operate?
● The motor is broken?
Malfunction diagnosis process:
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