Preventive maintenance - E111..E114
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7.8 E111..E114: fan cleaning
Fan
Rear view
Status: – Main switch open (OFF)
Material: – Not required
Equipment: – 3-mm allen spanner
– Soft bristle brush
– Vaccum-cleaner
–Gloves
Preliminary procedures / notes
– To ensure the control unit smooth operating, it is necessary to guarantee the
efficiency of the cooling system.
– The amount of dirt on the cooling fans and channel depends on the quality of the
air circulating in the installation area. The times specified in the maintenance plan
apply to a typical situation.
Before removing the panel, make sure the power is disconnected and
the fans are still.
Be careful, as the recovery resistance may be very hot.
We do not advise using compressed air, as it does not allow to
control the dirt removed, that could hit the operator face.
Operating procedure
a. The cleaning procedure shall include fans, dissipator, air passage channel and
panel grids.
b. Remove the Rear panel (see par. 5.3.3 on page 38) to reach the cabinet rear
area.
c. Remove the dirt using a brush and contemporaneously suck the dirt with the
vaccum-cleaner.
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