EN - 20
and carry out the self-test in accordance with
menu P76.
Fasten the screws to a maximum of 1.5 Nm.
This is roughly equal to setting 2 of an aver-
age battery-powered drill.
2.9.2 Inspecting and cleaning the fans
Check the fans once every 2 years.
1. Remove the heat exchanger as instructed in
the maintenance chapter of the heat exchang-
er.
2. Remove the screw from the electronics car-
riage.
3. Pull the electronics carriage carefully forwards.
4. Release the connectors (J) and the earth wire on
the control circuit board panel and fully remove
the cables including the two grommets (K).
5. Remove the entire scroll casing (L) by pressing
the click fasteners (M).
6 Remove the inflow nozzle (N) by pressing the
click fasteners surrounding the scroll casing.
7.
Inspecting and if necessary clean the fans (O).
- Use a soft brush to clean the fan impellers.
- Use a vacuum cleaner to remove dust.
K
J
M
O
N
I
L
Do not damage the fan impellers or tempera-
ture sensor.
If the preheater element filter also need
maintenance do not re-install the heat ex-
changer yet.
8. If no more maintenance is necessary install all
parts in reverse order, reconnect the power and
carry out the self-test in accordance with menu
P76.
Fasten the screws to a maximum of 1.5 Nm.
This is roughly equal to setting 2 of an aver-
age battery-powered drill.
2.9.3 Inspecting and cleaning the preheater
element filter
Clean the filter of the Preheater (if fitted)
once every 4 years.
1.
Remove the heat exchanger as instructed in the
maintenance chapter of the heat exchanger.
2. Remove the screw from the electronics car-
riage.
3. Pull the electronics carriage carefully forwards.
4.
Release the connectors (J) and the earth wire on
the control circuit board panel and fully remove
the cables including the two grommets (K).
5.
Remove the cable (P) from the control circuit
board panel.
6. Remove the Pre-heater holder by sliding it up
halfway and then pulling it away from the valve.
7. Remove the Pre-heater filter located behind the
Pre-heater holder.
8.
Inspecting and if necessary clean the preheater
element filter.
- Clean the filter with a brush.
- Remove any deposit using a damp cloth.
9.
Install all parts in reverse order.
10. Reconnect the power to the ComfoAir.
The hollow side of the Pre-heater filter must
face the Pre-heater holder.
Fasten the screws to a maximum of 1.5 Nm.
This is roughly equal to setting 2 of an aver-
age battery-powered drill.
11.
Carry out the self-test in accordance with menu
P76.
2.10 Malfunctions
Malfunctions in the ComfoAir are reported as fol-
lows:
• The malfunction alert appears on the CC Ease
panel;
• The malfunction alert appears on the CC Luxe
panel;
• The malfunction indicator on the 3-position
switch lights up;
Malfunction alerts may not appear on the digital
operating device in all cases, even though there is
a malfunction (or problem). A concise explanation
of both types of malfunction (or problem) is given in
the paragraphs below.
