Insufficient cooling in summer due
to by-pass operation.
The unit does not react to the
switch, the LED lights "RED"
when the switch is operated.
The LED on the RF switch lights
"ORANGE" when the unit is
operated.
The switch only reacts to the wired
position switch when the position
is changed.
The mechanical position switch
has a different setting to that on
which the unit runs.
I cannot switch the unit to this
position.
The unit is switched off because
the temperature of the air to the
house is below 5°C.
The unit is switched off and
when the RF switch is pressed the
following LED indication appears
on the circuit board
"RED - RED - ORANGE".
Please note that by-pass is not
active cooling.
To make the best use of the by-
pass, you should set the unit to
a high setting if the house is
overheated (temperature >
23°C) and the outside
temperature is cool.
Connect the switch to the unit
Replace the battery in the switch.
(CR2450)
Always switch the position switch to
another position and then switch
back to the desired position.
Reset the unit by removing the
plug from the wall socket and
putting the unit back on power.
Make sure that the cause is
removed:
- House not heated enough (at
least 16°C) to ensure correct
operation. connected correctly
(see page 9).
- Channels connected correctly.
- If the unit switches off again,
please contact your installer.
The switch is not connected to the
ventilation unit.
The battery life in the switch has
been reached.
OBSERVATION POSSIBLE
CAUSE SOLUTION
LED INDICATION CIRCUIT
BOARD
FOUND CODE
Red-orange
Problem with the exhaust fan.
Red Orange
Problem with the supply fan.
Red Red Orange
"Supply temperature too low" - stop.
Red Red Orange
Problem temperature sensor "of house".
Red red orange orange
Problem temperature sensor "outside".
Red red orange orange
Problem temperature sensor "from outside".
Red red orange orange
Problem temperature sensor "to house".
Red red orange
Problem with constant flow control supply.
Red Red Orange
Problem with constant flow control drainage.
LED INDICATION RF SWITCH
FOUND CODE
Red Red
Problem with the ventilation unit.
Green
The requested action was correctly communicated.
Red
Problem with communication.
Green Green
Successful coupling of the RF switch.
Orange
Battery life RF switch has been reached.
Orange orange (after operation)
Change filter, reset filter message, see p. 6
Orange Orange
Successful disconnection of the RF switch.
Orange orange orange
Access to settings denied.
MALFUNCTION 21
