Check For Unusual Noises; Inspecting And Cleaning The Fan - Heatrae Sadia ADVANCE Installer Manual

6.2. Check for unusual noises

If the ventilation unit produces unusual noises or vibrations, this
may indicate that the motor module or bypass valve is faulty.
Consult Inspecting and cleaning the fan on page 31 and/or
Inspecting and cleaning the bypass valve on page 32 to
determine the cause and resolve the problem.

6.3. Inspecting and cleaning the fan

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Caution!
If the unit is ceiling mounted, be careful to avoid being hit by
swinging wire brackets when removing the ventilation unit.
Follow the steps below when inspecting and cleaning the fan:
a) Disconnect power to the ventilation unit.
b) Unlock the duct adapters using a screwdriver.
2x
c) Tilt the ventilation unit away from the wall, ceiling or floor. Then
carefully remove the unit from the wire brackets and place it on
the floor.
d) Unscrew the screws attaching the motor module to the housing
and remove the screws.
e) Take the whole motor module including fans out of the
ventilation unit. To do so, use the handle on the motor module.
f) Inspect the blades of both impellers and clean them if
necessary (see next step).
g) Clean both fan impellers carefully with a vacuum cleaner.
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Caution!
When cleaning the fan make sure the balancing clamps have not
been displaced or come loose.
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