Heatsink; Cooling Fan; Fan Replacement (Frame E0) - ABB ACS850-04 series Hardware Manual

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Heatsink

The heatsink fins pick up dust from the cooling air. The drive runs into
overtemperature warnings and faults if the heatsink is not clean. In a normal
environment, the heatsink should be checked annually, in a dusty environment more
often.
Clean the heatsink as follows (when necessary):
1. Remove the cooling fan (see section
2. Blow clean compressed air (not humid) from bottom to top and simultaneously
use a vacuum cleaner at the air outlet to trap the dust. Note: If there is a risk of
the dust entering adjoining equipment, perform the cleaning in another room.
3. Refit the cooling fan.

Cooling fan

The actual lifespan of the cooling fan depends on the drive usage and ambient
temperature. Fan failure can be predicted by the increasing noise from fan bearings
and the gradual rise in the heatsink temperature in spite of heatsink cleaning. If the
drive is operated in a critical part of a process, fan replacement is recommended
once these symptoms start appearing. Replacement fans are available from ABB.
Do not use other than ABB-specified spare parts.

Fan replacement (frame E0)

1. Undo the fixing screw of the cooling fan holder.
2. Remove the cooling fan holder and disconnect the cable.
3. Undo the fastening screws of the fan.
Install the new fan in reverse order.
Frame size E0, bottom view
Maintenance
Cooling fan).
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