Fault rectification

Fault finding only by qualified electrician. Call on the services of a qualified electrician any time there is a fault. Repairs should only be carried out by a qualified electrician.

Switch off mains fuse, secure against being accidentally switched back on and position a warning sign.

Fault

Cause, measures

Fan does not switch on

No mains voltage.

Check whether the mains fuse has failed. Switch on if necessary.

Impeller is blocked.

Check that impeller is running smoothly. Clean impeller if necessary.

Motor’s thermal overload protection switches the fan off.

Motor too hot.

Put the on/off switch in the Off position. Wait until motor and temperature limiter have cooled. Cool-down time can be up to 15 minutes. Put the on/off switch in the On position. If the fault persists, call on the services of a qualified electrician.