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W3.260419
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4.1 Service reminder
The service reminder is activated with preset time inter-
vals and the symbol is displayed on the control panel’s
screen. As a factory setting, the service reminder is not
in operation. It can be put into operation under the
main menu item “Diagnostics”/”Service reminder”. The
recommended service interval for the ventilation unit is
six months.
When servicing has been performed, the service remind-
er is reset from “Alarm” in the main menu.
4.2 To open the ventilation unit
Before you begin any service work, isolate the power
supply voltage to the ventilation unit by pulling out its
electric plug from the wall socket. Wait a few minutes
before you open the inspection door of the ventilation
unit so that the fans have time to stop and possible air
heaters have time to cool down.
The inspection door can be opened by turning the lock
bolt with a screw driver for slotted screw heads.
Turn the service switch to the 0-position prior to com-
mencing servicing.
4.3 Filter
The filters should be replaced at least every six months.
The filters may need to be cleaned or replaced more often
in homes where there is considerable dust or if there are
many impurities in the outdoor air.
The ventilation unit must not be operated without
filters. Use only filters recommended by Swegon in the
ventilation unit. This is important, as filters with exactly
the same appearance and size can have very different
pressure losses and filter capacity. If an incorrect filter is
used, it is not certain that the ventilation unit will work
as designed. Check in the list of components that you
have selected correct filters.
4.4 Heat exchanger
You should check the condition of the heat exchanger
whenever you service the unit.
Withdraw the heat exchanger from the unit for inspec-
tion. Do not damage the heat exchanger fins.
Make sure that the passages through the heat exchang-
er rotor are not clogged and clean them e.g. with run-
ning warm water if required. Never use cleaning agents.
The passages of the heat exchanger should be dry
before you reinstall the heat exchanger in the unit.
4.5 Fans
The ventilation unit’s fans must be checked at least
every two years.
Dismantling the fans for cleaning
• Remove the filters and heat exchanger from the
ventilation unit.
4. Service
Important
The ventilation unit must not be operated
without filters! Only filters from Swegon
may be installed in the ventilation unit.
Find the correct filter in the Section enti-
tled: ”Technical data”.
!
!
• Open the locking devices on the fans and loosen the
locks.
• Tilt the lower part of the fan toward the rear wall
until the fan disconnects from the mounting bracket
behind.
• Turn the fan sideways and pull it away from its posi-
tion. Be careful not to damage the insulation on the
electric cables.
• Loosen the fastening screws on the partition wall and
remove the partition wall if necessary.
• If necessary, clean the fan with a soft brush. Be care-
ful not to dislocate the impeller balancing weights. If
significant amounts of dirt collect on the fan impeller
cleaning should be left to a professional.
• Reinstall the fan by sliding it towards the rear wall
and lift it into place, fit the locks.
• Fit the heat exchanger and filter.
The ventilation unit’s fans must be loosened
from their locations and protected, for example,
with plastic bags, while the ventilation ducts are
cleaned.
4.6 Other servicing
Clean the inner surfaces of the ventilation unit by
vacuum cleaning or with a damp cloth, if needed.
Check that dirt has not collected on the surfaces of the
air heater/coolers, clean if necessary.
Check that the condensate discharge outlet is not
clogged and check its outflow by pouring water on
the bottom of the ventilation unit. The condensate
discharge connection is located on the rear of the unit
under the rotary heat exchanger.
Check that the ventilation unit works normally and that
no alarms are shown on the screen or on the cooker
hood.
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