32
Maintenance and care
: Trouble shooting
See below list for a full description:
A B C
Error
code Fault
Possible cause
Action
required
Reset
-
Y
1
-
Filter alarm
Filter period
expired
Unmount filters
and examine for
dirt
Change filters and
reset alarm
Reset alarm and
reset filter by
pressing and
holding alarm
button for 5
seconds
On wireless
remote press
and hold center
button for 10
seconds
Same proce-
dure can be
used to reset
filter before
alarm.
Filters are
not dirty, so
filter period is to
short
Extend the filter
timer period
Filters are dirty
Change filters and
reset alarm
Filters are very
dirty, filter pe-
riod is to long
Change filters and
reset alarm
Shorten the filter
timer period
1 R
1
E 1
Exhaust air fan
No rotation
speed (tacho)
feedback from
the exhaust air
fan
Exhaust air fan
power cable not
connected
Connect Exhaust air
fan power cable
Manual reset by
pressing alarm
button on foil
panel or by
powering unit
off/on
Exhaust air fan
control cable
not connected
Connect Exhaust air
fan control cable
Exhaust air fan
does not work
Replace Exhaust
air fan
Exhaust air fan
cannot run the
desired RPM
Fan speed
setpoint is too
high
Lower fan speed
setpoint
Automatic
reset after 140
seconds, but
alarm will ap-
pear again if
problem is still
there
Fan is defect
Replace fan
2 R
1
E 2
Supply air fan
No rotation
speed (tacho)
feedback from
the supply air fan
Supply air fan
power cable not
connected
Connect Supply air
fan power cable
Manual reset by
pressing alarm
button on foil
panel or by
powering unit
off/on
Supply air fan
control cable
not connected
Connect Supply air
fan control cable
Supply air fan
does not work
Replace Supply air
fan
Supply air fan
cannot run the
desired RPM
Fan speed
setpoint is too
high
Lower fan speed
setpoint
Automatic
reset after 140
seconds, but
alarm will ap-
pear again if
problem is still
there
Fan is defect
Replace fan