10.4 Material recycling and discharging
Problem
Possible cause
Solution
Loose motor fixing
Tighten the fixing screws and check the
alignment.
Unbalanced fan blade/Fan blades
misaligned
IEC-fan: Balance the blade or change it.
EC-fan: Change the fan unit.
Faulty bearings
IEC-fan: Change the motor.
EC-fan: Change the fan unit.
3-phase motor running as single
phase
Check the connections.
Vibrating fan
Too big axial play
Check the bearings.
Fan blade is chafing against fan
collar.
Check the motor centering and fixing.
Motor ventilator is chafing against
the cover.
Repair the fan or cover.
Ventilator hits on insulation.
Prevent the touch.
Abrasive noise in
fan
Motor has loosened from its fixing. Tighten the fixing bolts and rebalance the fan.
Exceptionally heavy
noise of running
Air gap not centralized
Check the impeller placement and bearings.
WARNING:
Before moving to the solution, ensure that the unit is in safe condition. See
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Alfa LU-VE, Rev-04
89
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.