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Ventilation level Function
Ventilation
level 1 /
Continuous
operation
Ventilation
level 2
Ventilation
level 3
The volumetric flows can be adjusted
i
separately for each ventilation level,
both for the exhaust air and the
supply air. The settings are done by
your specialist installer.
5.2.5 The meaning of the LEDs
LED
Meaning
All LEDs off
Fault:
● Ventilation unit in
standby mode.
● Power supply
disconnected.
LED 1, 2 or 3
Display
lights
Reduced ventilation,
permanently
nominal ventilation or
intensive ventilation.
LED 1 flashes
Interval operation /
regularly at
Frost protection
short intervals.
ventilation
Reduced ventilation:
LED 1 lights up, the
ventilation unit runs at
ventilation level 1.
Nominal ventilation:
LED 2 lights up, the
ventilation unit runs at
ventilation level 2.
Intensive ventilation:
LED 3 lights up, the
ventilation unit runs for
approx. 1 hour at
ventilation level 3. After
that, the ventilation unit
switches back to ventila-
tion level 2. The switch-
back function can be
deactivated by a
specialist installer
(jumper 7 has to be
bridged on the control
circuit board, see
Chapter 9.6.3).
LED
Meaning
The selected
Carry out a filter
ventilation level
change. 3-month filter
LED flashes
change period has
regularly at
elapsed.
longer intervals
Change the air filter
Then, press both the
All 3 LEDs flash quickly
for a short time. The
filter change period
counter is reset to 0.
All 3 LEDs flash
Fault:
● Supply air
regularly at
longer intervals
temperature dropped
below frost protection
temperature (only if
TH 10 connected)
● Fan failure.
●Temperature sensor
faulty.
Resetting the error
message:
Press the plus but-
The flashing LED is
switched off.
Call on the services
In the case of a filter change before
i
the filter change period has
expired:
Press both the ▲ and ▼ buttons at
the same time for about 10 seconds.
See Chapter 7.3 for faults and their
i
rectification.
as described in
Chapter 6.2.
▲ and ▼ buttons
at the same time for
about 2 seconds.
ton ▲ for approx.
5 seconds.
of a trained
electrician if the LED
continues to flash or
if the fault recurs.
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