26
10 Maintenance table
Component
Action
Interval
Filter
Filters must be changed at least once a year. It is best to change them twice a year, before and after the
pollen season. Check that the filter seal is completely tight.
6-12
months
Fans
Fans must be cleaned at least once a year to maintain fan efficiency.
12 months
Rotary wheel-
type heat
exchanger
Check that the surfaces are clean. Check that the sealing strips face in towards the rotary wheel-type
heat exchanger. Check that the rotor belt is intact and not too slack.
12 months
Kitchen hood*
Wash the grease filter. Check that the damper is clean and closes fully.
2 weeks
Seals
Check that the seals on the door, under the filters, on the fan modules and on the rotor module are intact. 12 months
Valves
The supply air and extract air valves (for the bathroom, bedroom, laundry room, etc.) must be cleaned at
least once a year.
12 months
Air intake
Check that no leaves and other items have caught on the grille.
In periods of sea smoke during winter the air intake can freeze up. If necessary it must be scraped clean so
that the air can pass through.
12 months
Roof cowl
If the unit has a roof cowl, this must be checked for leaves and the like. Also check that the drain slots are
open.
12 months
Ducts
Check that the ducts are clean.
10 years
Brush strips
Check that the brush strips are intact and sit tightly against the rotor. If they are worn, they can be moved
to the next groove in the profile so that they are closer to the rotor.
3 years
Inside unit
A combination of a very low outside temperature and damp extract air can lead to the formation of
ice. Normally this will not be a problem - when normal operating conditions return the ice crystals will
be converted to steam and removed from the unit via the exhaust air. In the case of extreme cold over
extended periods the unit should be checked for ice.
Capacitor
In the electrical compartment there are two cylindrical electrical components called capacitors. The
life span of these components are limited to about 5 years, after which they will need to be replaced. An
exhausted capacitor may damage the fan motor.
The capacitors must be replaced by a professional.
New capacitors can be ordered from Flexit (art. no. 110354).
5 years
*For units with extract air from the kitchen hood connected to the unit.
11 Troubleshooting
Type of fault
Remedial action
Cold draughts
Check what supply temperature has been selected. See control panel.
Check that the rotor is rotating.
Check that heating comes on.
New extract filter needed.
Fans not working
Check that power is connected to the unit.
Check that the overheating thermostat has not cut out.
Reset by pressing the button. Must also be reset on the automatic panel. See chapters 1.4, 4.7 and 7.10.
Low air flow rate
Check what speed the unit is set to.
Check that the filters are tight.
Check the intake grille.
