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ä Attention
!
Make sure that the balancing clamps do not shift or loosen
when cleaning the fan!
j) Remove the insulation board.
k) Turn the PCB module over and disconnect the connector of
the frost protection sensors and the connector of the
bypass/frost valve motor. These are the connectors on the
wires that go through the black foamed plastic housing.
l) Now the hard plastic sheet complete with fans, power
supply and control can be separated from the black
foamed plastic housing.
o) Check that the fans are still balanced by setting either fan in
motion. If the impellers are very swaying (and this has led to
noise problems), the entire motor module must be replaced.
p) Mount the motor module and ventilation unit in reverse
order.
q) Bring the ventilation unit back under tension.
6.8. Inspecting/cleaning channels
It is advisable to check the channels in the house once every 4
years. The ducts should be cleaned once every 8 years.
m) Inspect the impeller blades of both fans.
n) Carefully clean both impellers with a hoover if necessary.
ä
Warning!
Disconnect the unit, or remove the motor plate, when cleaning
the ducts so that the unit does not get dirty inside (RV sensor)!
