ACS/ACC/ACP 601 Frequency Converters 5-1
Chapter 5 – Maintenance
The ACx 600 requires minimum maintenance.
WARNING! All maintenance work described in this chapter should only
be undertaken by a qualified electrician. The
Safety Instructions
on the
first pages of this manual must be followed.
Heatsink
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 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.
Fan
The cooling fan lifespan of ACx 601 units is about 60 000 hours. The
actual lifespan depends on the frequency converter 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 frequency converter 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 The fan can be withdrawn by removing the bottom of the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.
Capacitors
The ACx 600 intermediate circuit employs several electrolytic
capacitors. Their lifespan is approximately 100 000 hours, but
dependent on the frequency converter loading and the ambient
temperature.
Capacitor life can be prolonged by lowering the ambient temperature. It
is not possible to predict capacitor failure.
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