21
The supply air fan does not
start
Switch on the ventilation selector
switch.
The supply air fan should now start!
If not:
■
Check the customer-provided
mains power supply
■
Check the fan and drive can
move freely
■
Check the electrical cables on
the fan motor for damage
CAUTION
Repair work on the electrical
installation and on the burner
must be performed exclusively
by authorised specialists for
safety reasons.
CAUTION
Adjustment and maintenance
work on the unit and forced-
air burner may only be carried
out by authorised and quali-
fied technicians!
NOTE
If all of the functional checks
have been carried out without
any findings, please contact an
authorised service station.
Possible causes of malfunction:
■
The units were not able to cool
down because the electrical
connection was interrupted.
Even a brief interruption of the
power supply can cause the STB
to trip
■
Too high an outlet temperature
due to incorrectly implemented
air ducting or air louvre settings
■
The air inlet or air outlet is not
free
■
Check the temperature control-
ler (TR) for function and correct
setting
■
Check the temperature monitor
(TW) for function and correct
setting
!
!