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Ventilation is too weak
If ventilation is not ecient enough, check the following:
• the lters are clean and do not need to be changed.
If the lters are dirty, change them as described in the
instructions in chapter Changing a lter.
• ventilation needs have not changed signicantly after
designing and installing the system. If, for example,
the number of people using the building or the your
daily routines have changed, your ventilation system
may require updating. Contact the system designer.
Ventilation is too noisy
Although our ventilation units are fairly quiet, it is
impossible to make them completely silent. A well-
planned and built system, where the units are not near
the bedrooms, and where sound-proofed doors and
dampers are used, reduces the disturbance caused by
ventilation.
If the ventilation system is noisier than usual, check that:
• the lters are clean and do not need to be changed.
If the lters are dirty, change them as described in the
instructions in section Changing a lter.
• the blowers are clean and do not need to be cleaned.
If they are dirty, clean them as described in the
instructions in section Cleaning the blowers.
• automatic humidity booster is not in operation. If the
ventilation boost is constantly on*, it can be a sign of
too high a indoor air humidity. Contact the system
designer.
If ventilation needs to be silenced only temporarily, you
can activate the Silent mode by tapping the green circle
on the main page of the control panel and choosing
Silent mode. The ventilation unit automatically reverts to
normal operation after a time period congured in the
settings.
* You can check this from the system information menu.
Control panel is not working
If controlling the ventilation unit with the control panel is
not working, check that:
• the control panel battery is not functioning. If the
battery is empty, recharge it by placing the control
panel in the wall mount.
Air is too humid.
Besides your own observations, you can notice high
humidity by checking the control panel and listening to
the noises the ventilation system makes. If the automatic
humidity boost is on constantly*, it can be a sign that air
is too humid and the ventilation system is trying to x the
issue. If the indoor air is too humid, check that:
• the lters are clean and do not need to be changed.
If the lters are dirty, change them as described in the
instructions in section Changing a lter.
• ventilation needs have not changed signicantly after
designing and installing the system. If, for example,
the number of people using the building and/or
the use of sauna and showers has changed, your
ventilation system may require updating. Contact the
system designer.
* You can check this from the system information menu.
Ventilation is not on
If ventilation is not working, check that:
• the ventilation unit switch is in ON position.
• the unit power cable is plugged in
• unit is connected to electric input
• fuse is working
If the problem is any of the ones mentioned before, and
the ventilation is not working, contact a maintenance
company.