13
Alarm name
Explanation
Do the following
Extract air fan control error
Flow or pressure alarm for extract
air. The pressure is bellow pressure
limit.
• Alarm stops the unit.
Check that air tube for pressure
sensor is connected properly and
cable is not damaged.
Contact your installation company or
place of purchase.
Fire alarm
Fire alarm is active.
• Alarm stops the unit.
Once the external Fire alarm is
disabled – alarm has to be
acknowledged and unit restarted.
Emergency thermostat
Indicates triggered overheat
protection (in case of installed
electric re-heater battery).
A triggered manual or automatic
overheat protection (EMT) gives an
alarm in the control panel.
In case a manual overheat protection
is triggered, reset it by pushing the
reset button.
If the automatic overheat protection
is triggered, it will reset
automatically once the temperature
has dropped.
If the problem continues contact
your installation company or place of
purchase.
Bypass damper
Indicates malfunction in bypass
damper.
Disconnect the main power supply
for 10 seconds to reset control
function.
Power up the unit, an automatic
bypass damper test will be
performed.
If the alarm occurs again after
approximately 2 minutes – contact
your installation company or place of
purchase.
Rotor guard
Indicates a rotor malfunction.
No rotation guard signal for 180
seconds.
If the rotating heat exchanger has
stopped. Check the rotor belt.
If the heat exchanger is still rotating,
check that the quick connector for
the sensor is connected and that
there is an air gap of 5-10 mm
between the sensor and the magnet.
Adjust the gap if necessary.
If the alarm persists, the rotor sensor
may be faulty. Contact your
installation company or place of
purchase.
Secondary air damper
Secondary air defrosting failed.
Outdoor air temperature sensor
measures < 10°C in 2 sec after
defrosting
OR
Outdoor air temperature sensor
measures < 5°C in 5 min after
defrosting
Check if secondary air damper is in
correct position.
Check that damper is connected
properly and cable is not damaged.
Contact your installation company or
place of purchase.
Outdoor air temperature
sensor
Indicates outdoor air temperature
sensor malfunction.
Check that sensor is connected
properly and cable is not damaged.
Contact your installation company or
place of purchase.
Overheat temperature sensor
Indicates overheat temperature
sensor malfunction.
Check that sensor is connected
properly and cable is not damaged.
Contact your installation company or
place of purchase.
| 01_1.8.0
