Heatsink - ABB ACSM1 Hardware Manual

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Heatsink

The heatsink fins pick up dust from the cooling air. The regen supply module 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. Replace the cooling fan.
Maintenance
Cooling fan).