Operating instructions
32
Troubleshooting
DANGER
Fatal electric shock due to improperly
carried out repairs.
Ø
Ensure that all repairs are carried out
by the manufacturer or by
authorised, specialised personnel.
Fault
Possible cause
Remedy
No power supply.
Check that the all-pole mains switch is
turned on.
Switch the mains switch on.
Fan and lighting do
not work.
The fuse may have been tripped or is
defective.
Check to see if the fuse has tripped.
When you use electric circuit breakers, turn
the circuit breaker on again.
For other types of fuse, consult a qualified
electrician.
The device is not switched on.
Check all possible power levels.
See Page 14.
The device is connected to a window
contact switch and the window is closed.
Open the window.
The fan does not
work.
The device is connected to a berbel P4
Multi under-pressure monitor and the
under-pressure monitor has detected a
critical under-pressure (see the berbel P4
Multi operating and assembly instructions).
Open the window.
Wait until the air pressure returns to
normal.
The lighting does
not work.
The bulb has blown.
Please consult your berbel dealer.
Smells occur during
operation.
The filter filling is used up.
Change the filter filling.
See Changing the filter filling (hybrid and
recirculated air filters) on page 29.
