Zehnder Rittling ComfoAir 350, Руководство по установке

Страница: 24 / 36

EN - 24
A7
Preheater element
does not heat
sufficiently.
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 small plastic panel in
front of the
control circuit board
by unscrewing the two screws.
Is the
resistance of
the preheater
element > 100 ? Yes
No
Disconnect the power from the
ComfoAir.
Remove the cover panel.
Yes
No
Resistance of
the NTC sensor
T1 correct?
Replace the
control
circuit board
.
Replace the
NTC sensor.
Yes
No
Is the
resistance of
the preheater element cable
infinite ?
Replace
preheater
element cable
Yes
No
Are the
connections
at
the preheater
element correct?
Replace
preheater
element
.
Reconnect the
preheater
element.
Install all parts in
reverse order.
Reconnect the
power to the
ComfoAir.
Is
P51 and
P57 set to
the correct
value?
Yes No
Set P51 and P57 to
the correct value.
Reset the unit (P74 on 1)
Remove the cable of the preheater
elment from the control circuit
board.
This error will appear
when after 3 minutes of
switching on the preheater
element the temperature
increase of T1 is less
then 4ºC. This can also
happen when there is too
much cold air passing the
preheater element. In that
case reduce the airflow
and reset the unit (P74 on
1).