13
6.
Faults
Warning!
The user/consumer must not open the device!
The fan does not run any more
Cause
Solution
a) The main switch is in the OFF position.
●
Set the main switch to On.
b) The fan is not (properly) electric
connected.
●
Connect the fan correctly electrically.
c) The fan is jammed due to extreme contamination.
●
Clean the fan. Internal cleaning
may only be carried out by a
The work must be done by a recognised
installer.
D) The fan is defective.
●
Replace the entire fan.
The fan makes (too) much noise
Cause
Solution
a) The fan is not properly mounted.
●
Mount the fan correctly (with the
supplied with dowels and screws).
b) The drain has a lot of resistance.
●
Clean the duct. Internal cleaning
may only be carried out by a
The work must be done by a recognised
installer.
c) The fan moves too much air.
●
Change the flow settings. See
chapter 3.4.
d) The fan is running.
●
Clean the fan. Internal cleaning
may only be carried out by a
The work must be done by a recognised
installer.
e) The fan is jammed due to deformation of the
housing. The ring in which the non-return valve
mounted is taken off
●
Replace the attachment ring on the
round housing part. The non-return
valves
may be removed.
f) The fan is defective.
●
Replace the entire fan.
The fan does not discharge enough air
Cause
Solution
a) The flow rate setting of the fan is too
low.
●
Change the flow settings. See
chapter 3.4.
b) The installation has too much resistance (dirt,
long, curved, flexible duct, external wall grille
is closed, etc.).
●
Remove the resistors from the fan.
Internal cleaning may only be
performed by a recognised installer
be done.
c) Insufficient air supply in the room.
●
Make sure that sufficient air can be
supplied, for example at least 3 cm
under the door.
