Movex 106-3, Installation Instructions Manual

7

Symptom 

Possible fault

The fan has stopped  Fault in the power supply.

Check the power supply.

Short circuit in connection.

Check for moisture in the safety

switch and motor connection.

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

Mo

t

or winding

Check for resistance between

windings.

Debris

Check that there are no

foreign objects in the fan

housing.

Incorrect direction of rotation

Check the direction of

rotation.

Connections

Check that connections and

duct routing are correct.

In order to satisfy applicable standards, the 

FB fan must be fitted with a contactor and 

overcurrent protection.

To choose the correct contactor, see page 6.

If technical regulating apparatus (e.g. 

frequency converter) is used, the 

manufacturer's recommendations for avoiding

interference must be observed. E.g. EMC, 

protective earth, cable length, cable shielding, 

etc.

.

The one phase motor is equipped with double 

capacitors. When the fan is not operating 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.

Troubleshooting

Always go through the troubleshooting schedule

before contacting Movex. This schedule contains

information that makes it easy to identify faults that

are simple to rectify.

Set external safety switch in the off position.

The fan can start up without warning following

a power outage

Only qualified personnel may perform servicing

work on the fan.