MALFUNCTION 43
OBSERVATION
POSSIBLE CAUSE
SOLUTION
The ventilation unit is shut down
and by pressing the RF 3-position
switch as well as the CO
2
- and RH
RF switch you get the following
LED indication on the circuit board
“RED - RED – ORANGE”.
The ventilation unit is shut down
because the temperature of the air
to the home is lower than comfort
values.
The device resumes
automatically. Be sure that
the cause is removed:
- Home insufficient heated
(minimum 16°C) for guaranteed
correct functioning.
- Ducts correctly connected.
- If the unit shuts back off, you
must contact your installer.
The mechanical position switch
is set to a different position then
that in which the ventilation unit
is running. I cannot switch the
ventilation unit to this position.
The switch reacts only on the
wired position switch when the
position is adjusted.
Always switch the position switch
to a different position, and then
switch it back to the desired
position.
The LED on the RF 3-position
switch as well as the CO
2
- and
RH RF switch light up “ORANGE”
when operating the ventilation unit.
Replace the battery in the switch.
(CR2450)
The ventilation unit does not react
to the switch, the LED lights up
“RED” when operating the switch.
Link the switch to the ventilation
unit
Inadequate cooling in the summer
via the bypass function.
Please note that bypass is not
active cooling. In order to make
optimal use of the bypass you
must, in case of overheating of
the home (temperature > 23°C),
set the ventilation unit in a high
position if there are cool outdoor
temperatures.
The service life of the battery in the
switch has been reached.
The switch is not linked to the
ventilation unit.
