EN - 21
E1 /
E2
Supply fan / Exhaust
fan not rotating
Remove the filter caps
from the ComfoAir.
Release the front
panel by unscrewing
the screws.
Lift the front panel
from its hinges.
Remove the plastic
panel in front of
the control
circuit board.
Is
there 230 VAC
power present
on the fan ?
Yes
No
Disconnect the power
from the ComfoAir.
Replace the control
circuit board.
Is a
control signal
(1,5 - 10 VDC)
present on
the fan?
Yes
No
Disconnect the
power from
the ComfoAir.
Replace the
control circuit
board
Replace the fan.
(See
the
maintenance
chapter of the fans
)
Disconnect the power
from the ComfoAir.
E4
ComfoAir has been
switched off by
external contact
Cause depends on what
equipment is interfaced
with the ComfoAir.
Check the relevant device
Activate the self-test
(P76 on 1)
Risk of electrocution.
