23 - EN
A5 /
A6
Malfunction in the
bypass / preheater
element motor
Remove the handles
from the ComfoAir.
Remove the filters from
the ComfoAir.
Release the front panel
by unscrewing
the screws.
Slide the front panel
upwards and remove
the front panel from
the ComfoAir.
Release the cover panel
by unscrewing
the screws
Remove the screw
from the electronics
carriage and pull the
electronics carriage
carefully forwards.
Activate the self-test.
(P76 on 1)
Remove the cover
panel.
Did the
bypass motor /
preheater element
motor run
Yes
Disconnect the
power from
the ComfoAir.
Replace the
control circuit
board.
Remove the
motor
Disconnect the
power from
the ComfoAir.
Is the cog of
the motor
defective?
Yes
No
Replace the cog
of the motor
Replace the
motor
Was there
8 VDC power
present on the
motor?
Yes
Disconnect the
power from
the ComfoAir.
Replace the
motor
No
No
Risk of electrocution
.
After the Zender ex-
tention cable
.
