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.
Fault
Cause, measures
Fan does not switch on.
VZ or F units: Wait for start delay (approx. 50 seconds).
No mains voltage. Check whether the mains fuse has failed. Switch on if necessary.
Impeller is blocked.Rectification may only be carried out by a trained specialist: Unlock and remove the internal grille/shutter frame. Check impeller and clean if necessary.
Fan does not switch off.
VZ or F units: Wait for overrun time (approx. 6 minutes).
Motor’s thermal overload protection switches the fan off.
Motor too hot. Wait until the motor has cooled down. Cool-down time can take up to 10 minutes. Unit switches back on automatically after cooling down.
Lamellae do not open or close for K units.
Lamellae very dirty or blocked. Clean lamellae. Check whether there are any objects between the lamellae. If so, remove them.
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.