47
Param
eters
Meaning
Value range
14
Bypass position
0 Bypass closed
1 Bypass automatic
2 Supply air min.
15
Outdoor air temperature
-100 to +100 °C
16
Extract air temperature, actual
value
-100 to +100 °C
17
Supply air flow rate, actual value
0 to 400 m
3
/h
18
Extract air flow rate, actual value
0 to 400 m
3
/h
19
External pressure drop, supply air
side, actual value
0 to 120 Pa
20
External pressure drop, extract air
side, actual value
0 to 120 Pa
21
Frost protection status
0 Not enabled
1 Pressure imbalance
5 Supply air fan off
Fault messages
A 2-digit fault code is shown on the
remote control display if a fault has
developed in the domestic ventilation
system.
Other current fault messages can be dis-
played with
x
/
w
. For an explanation
of the fault codes, see the following
table.
Holding down
d
for at least 3 s enables
the display of fault and filter change mes-
sages to be reset.
The appliance remains in a fault state
until the fault has been removed. As
soon as this is the case, the appliance
starts automatically; the default display
will be shown again.
Code
Cause
Measure
F2
The supply air fan
does not work.
Check all cables and connections of the supply air
fan; replace the fan if required.
F5
The extract air fan
does not work.
Check all cables and connections of the extract air
fan; replace the fan if required.
F9
Outdoor air temper-
ature sensor faulty.
Check sensor leads to the control PCB.
Check sensor; replace if necessary.
Troubleshooting
Diagnosis at the remote control
(cont.)
5608 999 GB
