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Heatsink
Fan
Capacitors
Reforming
ACS/ACC/ACP 601 Drives
The ACx 600 requires minimum maintenance.
WARNING! The Safety Instructions on the first pages of this manual
must be followed.
The heatsink fins pick up dust from the cooling air. The ACx 600 can
run into overtemperature Warnings and Faults if the heatsink is not
cleaned regularly. In a normal environment, the heatsink should be
checked and cleaned annually.
The dust should be removed gently with a soft brush if the cleaning is
carried out in the same room where the unit is normally operated.
Compressed air should not be used for cleaning unless the installation
can be taken apart and the cleaning is carried out in another room (or
outdoors). Fan rotation should be prevented (in order to prevent
bearing wear) when using compressed air for heatsink cleaning.
The cooling fan lifespan of ACx 601 units is about 60,000 hours. The
actual lifespan depends on the AC 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.
The fan can be withdrawn by removing the bottom of the frame.
Replacement fans are available from ABB. Do not attempt operation
with other than ABB specified spare parts.
The ACx 600 intermediate circuit employs several electrolytic
capacitors. Their lifespan is approximately 100,000 hours, but
dependent on the drive loading and the ambient temperature.
Capacitor life can be prolonged by lowering the ambient temperature. It
is not possible to predict capacitor failure.
Capacitor failure is usually followed by an input line fuse failure or a
Fault trip. Contact ABB if capacitor failure is suspected. Replacements
are available from ABB. Do not attempt operation with other than ABB
specified spare parts.
For more information on reforming (re-aging) spare part capacitors,
contact Technical Support.
Chapter 5 – Maintenance
ACx=ACS/ACC/ACP
5-1
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