Maintenance 95
Capacitors
The drive intermediate circuit employs several electrolytic capacitors. The lifespan
depends on 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 unit 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
Converter modules
with electrolytic DC capacitors in the DC link, Capacitor reforming instructions
(3BFE64059629 [English]).
Replacing the capacitor pack (R7)
Replace the capacitor pack as described in
Replacing the fan (R7)
(page 93).
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