36
The supply fan (top) is no longer running
Cause
Solution
(a) The connector of the fan is loose or
Wrongly connected.
●
Place the connector of the fan on
the correct connection of the circuit board.
(b) The frost regime is active.
●
If the outside temperature becomes
extremely low, the fan is switched off to
prevent the changer from freezing.
When the outside temperature rises
sufficiently, the fan will start again.
start spinning.
c) The fan starts/stops due to extreme temperatures.
pollution.
●
Clean the fan impeller.
Pay attention to the balancing clamps.
(d) The fan is defective.
●
Replace the fan.
e) The printout of the ventilation unit is defective.
●
Replace the PCB and feed the
Commissioning procedure again.
The ventilation unit makes noise
Cause
Solution
a) The fan is start/stable due to extreme
temperatures.
pollution.
●
Clean the fan impeller.
Pay attention to the balancing clamps.
b) The fan is not (or no longer) balanced.
●
Replace the fan.
c) The ventilation unit is mounted on a
wall/ceiling/floor with insufficient load-bearing
capacity.
●
If the ventilation unit can no longer be
moved, try it by means of vibration
dampers on the
Wall/ceiling/floor detachable.
(d) The channels are not properly connected to
the unit.
●
Check the connections and make sure
that fixed ducts on the wall/ceiling/floor
are buckled.
(e) The bypass valve activates (rattling sound).
●
The bypass valve runs against the stop
during the self-test after the voltage has
been switched on. Wait 30 seconds and
check that the sound has stopped.
●
Inspect the valve. Clean it if it gets dirty.
Replace the valve if there is any other
problem.
cause.
The ventilation unit does not (no longer) respond to the RF controls
Cause
Solution
a) The battery of the RF control is empty.
●
Replace the battery.
b) The RF control has not (no longer) logged on to
the ventilation unit.
●
Start the commissioning procedure
again and log on the RF control.
(c) The distance between the ventilation unit and
the RF control is too great or the signal
encounters too many obstacles.
●
Please try to register again. If this does
not work, move the RF control to a place
where it will be less sensitive.
is encountering obstacles.
(d) The brand names of the RF control and the
ventilation unit do not match.
●
Replace the RF control with one of
The same brand as the ventilation unit.
e) The printout of the ventilation unit is defective.
●
Replace the PCB and feed the
Commissioning procedure again.
