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Maintenance and care: Trouble shooting
A B
10 R
11 R
Error
C
Fault
code
0
E 10
Outdoor temper-
ature < -13 °C
0
E 11
Supply tempera-
ture < +5 °C
Reduced heat
recovery due to
low extract air
temperature
Reduced heat
recovery due to
low extract flow
Action
Possible cause
required
-
-
Low tempera-
Ensure heating in
tures extracted
all ventilated
from nonheated
rooms
rooms
Alternatively, close
the vents to rooms,
which are not
heated
Poor insulated
Improve insulation
ducts in cold
of ducts
environments
Dirty extract air
Change filters
filter
Poor balancing
Adjust the system
of the air flows
A bathroom
Remove the extract
extract fan is
fan from the bath-
creating under-
room and instead
pressure in the
connect the extract
house
air from the bath-
room to the ventila-
tion system
A kitchen
Create heated
extract fan is
replacement
creating under-
air for the extrac-
pressure in the
tion hood.
house
If not possible open
a window/door
while the extraction
hood is running
A stove fan is
Contact supplier
creating under-
of chimney/stove
pressure in the
to secure safety
house
precautions
Reset
Automatic re-
start after 1800
seconds
Manual reset by
pressing alarm
button on foil
panel or by
po-wering unit
off/on
Firmware
version 2.9
and up, also
has automatic
restart after 600
seconds
35
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