Malfunctions/Repairs - Multifan VF9670D Montageanleitung

10. Malfunctions/repairs

To be checked by the installer:
Is there a problem with the mains power supply?
•
Is the fuse blown?
•
Is the wiring loose?
•
Are the bearings jammed?
•
Is the impeller blocked?
•
Fault
Bearings noisy and/or turn difficult
Fan does not start or rotates too
slow
Motor protection switch turns the
fan off
(1)
Use original spare parts only!
VF9670D (20-09-2012)
Translation of original user manual
Caution: In case the fan does not rotate this may be caused by the
thermal protection. The fan turns on again automatically. Contact your
installer in case of malfunction.
Solution
Replace bearings
No power supply:
•
•
•
With power supply:
•
•
•
•
•
•
(1)
Turn on mains power supply
Switch on controller
Check fuse and replace, if necessary
Check capacitor and replace, if necessary
Check motor and replace, if necessary
Clean
(1)
Replace bearings
Check motor and replace, if necessary
Repair or replace controller
(1)
(1)
(1)
(1)
(1)
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