34
6.2.5. Cleaning of the impeller
If inspection reveals that the blades are seriously soiled,
the impeller must be cleaned by the installer:
a)
Disconnect the ventilation unit from the power supply.
b)
Dismantle the lid as mentioned in Setting high
and low.
c)
Loosen the motor plate by unlocking the clamping
lugs in the three slots on the plate using a flat-blade
screwdriver.
d)
Remove the motor plate, complete with motor
and impeller and circuit board housing.
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