Heatsink; Fan; Fan Replacement (D6, D7) - ABB DCS800 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 (not dusty, not clean) 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 Fan).
2. Blow clean compressed air (not humid, no oil) 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. Replace the cooling fan.

Fan

The cooling fan lifespan of the drive is about 50 000 operating hours. The actual
lifespan 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 (D6, D7)

Maintenance
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