4 Changing air filters
6
Setting ventilation level
RLS 45 O:
Press button,
associated LED lights up.
Ventilation level 0 only
when the Off function is
active (service menu).
RLS 45 K
,
DS 45 RC
:
Press button, associated
LED lights up.
RLS 45 O, RLS 45 K
:
Ventilation level LEDs, levels 0 to 5
0
1
2
3
4
5
PP 45 RC, PPB 30 RC:
Ventilation level LEDs, Levels 0 to 5
(orange or blue)
0
1
2
3
4
5
LED
off
LED
flashes
1 time
LED
flashes
2 times
LED
flashes
3 times
LED
flashes
4 times
LED
flashes
5 times
Switching on demand-driven operation (auto-
matic dehumidification mode)
Function only enabled with activated hu-
midity sensor.
RLS 45 O:
Select ventila-
tion level 3. Select an-
other ventilation level to
switch off.
RLS 45 K:
Press one of
the two buttons for
2 seconds. Automatic
symbol lights up. To
switch off, press button
again for 2 seconds.
DS 45 RC:
Press one of
the two buttons for
2 seconds. At the bottom
of the ventilation unit, the
LED lights up for
5 seconds: orange = heat
recovery mode, blue =
cross-ventilation mode.
To switch off, press but-
ton again for 2 seconds.
Switching on intermittent ventilation (level 5)
RLS 45 K
,
DS 45 RC
:
Press the button for
2 seconds. The unit runs
for
30 minutes
at level 5,
the corresponding LED
lights up. Duration can be
parametrised.
Switching on sleep function (level 0)
RLS 45 K
,
DS 45 RC
:
Press the button for
2 seconds. The unit turns
off for
60 minutes
(level 0), the correspond-
ing LED lights up. Dura-
tion can be parametrised.
4 Changing air filters
Filter change indicator flashes
RLS 45 O:
Current LED
flashes.
Performing and
acknowledging filter
change:
Press and hold
the button for 5 seconds.
RLS 45 K
: Current LED
flashes.
Performing and
acknowledging filter
change:
Press and hold
both buttons for
5 seconds.
PP 45 RC
/
PPB 30 RC
:
At the bottom of the RC
device, an LED (orange
or blue) flashes.
Remove the housing
cover,
perform and ac-
knowledge filter
change:
Press SET but-
ton for 5 seconds. Attach
housing cover.
CAUTION:
Never operate the ventilation unit
without an air filter → Ventilation unit gets dirty,
unfiltered substances can enter the rooms. Only
use original air filters with prescribed filter class
→ In case of non-compliance, risk to health due
to harmful substances that can accumulate in the
air filter. Pay attention to the filter change indic-