EN - 33
7 Malfunctions
The RF versions of the control unit are equipped with the following communication-oriented error
messages:
Error message
Problem
Solution
After pressing the operating
button, the CO
2
indicator shows
the CO
2
level.
The right column flashes
alternately green and red.
The control unit is not yet paired to
a ventilation unit. Installation has
not been completed.
Pair the CO
2
sensor to the
ventilation system. See the section
on commissioning.
The CO
2
indicator flashes red 3x.
The selected mode flashes 3x.
The original mode is then
displayed continuously.
An operating action has been
performed, but communication is
not possible.
1. Remove objects that
could hinder the wireless
communication.
2. Try to change the setting
again.
The CO
2
indicator flashes red
continuously.
The CO
2
level is too high, signal
is complete, but there is no
communication.
1. Remove objects that
could hinder the wireless
communication.
2. Ensure adequate air quality by
opening windows and doors.
