11. Cleaning
│
UK
21
1. Switch off mains fuse, secure against being
accidentally switched back on and position a
warning sign.
2. Only clean inside parts of the fan with a
dry cloth.
3. If the designer cover [7] is very dirty,
remove it carefully (
fold out page,
Fig. B) and clean with water.
4. Fit designer cover [7] (
fold out page,
Fig. B). Switch the mains fuse on,
remove warning sign.
12. Fault rectification
Fault finding only by trained specia-
lists. Call on the services of a trained
electrician any time there is a fault.
Repairs should only be carried out by
a trained electrician.
1. Switch off mains fuse, secure against being
accidentally switched back on and position
a warning sign.
Fault
Cause, Measure
Fan does
not switch
on.
Start delay (max. 120 seconds).
Wait for the start delay and
reduce if necessary,
Chap. 9.5.
Fan does
not switch
on.
No mains voltage.
Check whether the mains fuse has
failed. Switch on if necessary.
Fan does
not switch
on.
Impeller blocked.
Should only be carried out by
a trained electrician:
Remove
cover [6]. Unlock internal grille
[5.1] or internal shutter [5.2] using
locking hooks (see arrow) and
remove. Check impeller and clean
if necessary.
Fault
Cause, Measure
Fan does not
switch off.
Overrun time
(max. 25 minutes).
Wait for the overrun time and
reduce if necessary,
Chapter 9.5.
Motor’s
thermal
overload
protection
switches the
fan off.
Motor too hot.
Wait until the motor has
cooled. Cool-down time can
be
up to 10 minutes
. Unit
switches back on automa-
tically after cooling.
Lamella do
not open or
close
for K units.
1) Lamella very dirty or
blocked.
Clean lamella. Check whether
there is anything between the
lamella. Remove if necessary.
2) Check whether the wiring is
correctly carried out refer to
diagram 1 (high level),
page 34. Bridge terminal 1
and 2.
Fan does not
switch off
or
fan switch on
accidentally.
A high-impedance voltage
applies against terminal L1
with a control switch negative
glow lamp, parallel installed
wires (mutual induction) or
transformers respectively
other electrical parts.
Recommendation: Connect a
X2-capacitor (220 nF/250 V)
against neutral lead.