Movex FB Series - Troubleshooting

7
Symptom Possible fault
The fan has stopped Fault in the power supply.
Check the power supply.
Short circuit in connecon.
Check for moisture in the safety
switch and motor connecon.
Locked impellar
Check that there are no
foreign objects in the fan
housing.
Locked impellar
Check that no ice has formed
in the fan housing.
Locked impellar
Check that the bearing in
the motor is working.
Loss of performance Motor winding
Check for resistance between
windings.
Debris
Check that there are no
foreign objects in the fan
housing.
Incorrect direcon of rotaon
Check the direcon of
rotaon.
Connecons
Check that connecons and
duct roung are correct.
In order to sasfy applicable standards, the
FB fan must be fied with a contactor and
overcurrent protecon.
To choose the correct contactor, see page 6.
If technical regulang apparatus (e.g.
frequency converter) is used, the
manufacturer's recommendaons for avoiding
interference must be observed. E.g. EMC,
protecve earth, cable length, cable shielding,
etc..
The one phase motor is equipped with double
capacitors. When the fan is not operang in full
running speed, i.e. during the start-up and shut down
process, the motor produces a mechanical sound,
deriving from the switch between the two capacitors.
This is a normal sound and it is not harmful for the
motor.
Troubleshoong
Always go through the troubleshoong schedule
before contacng Movex. This schedule contains
informaon that makes it easy to idenfy faults that
are simple to recfy.
Set external safety switch in the off posion.
The fan can start up without warning following
a power outage
Only qualified personnel may perform servicing
work on the fan.