ACS550-02/U2 User’s Manual
289
Maintenance
Capacitors
The drive intermediate circuit employs several electrolytic capacitors. Their life span
is at least 90 000 hours depending on the operating time of the drive, loading and
ambient temperature. Capacitor life can be prolonged by lowering the ambient
temperature.
It is not possible to predict a capacitor failure. Capacitor failure is usually followed by
damage to the drive and an input cable fuse failure, or a fault trip. Contact ABB if
capacitor failure is suspected. Replacements are available from ABB. Do not use
other than ABB specified spare parts.
Reforming
Reform (re-age) spare part capacitors once a year according to
Guide for Capacitor
Reforming in ACS50, ACS55, ACS150, ACS350, ACS550 and ACH550
[3AFE68735190 (English)], available on the Internet (go to ABB website and enter
the code in the Search field).
Replacing the capacitor pack (R7)
Replace the capacitor pack as described in section
Replacing the fan (R7)
on page
287
.
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