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Capacitors
Reforming
The drive DC link capacitors need to be reformed (re-aged) if the
drive has been non-operational for more than one year. Without
reforming capacitors may be damaged when the drive starts to
operate. It is therefore recommended to reform the capacitors
once a year. See page
manufacture from the serial number shown on the drive labels.
For information on reforming the capacitors, refer to Guide for
Capacitor Reforming in ACS50, ACS55, ACS150, ACS310,
ACS350, ACS355, ACS550, ACH550 and R1-R4 OINT-
/SINTboards (3AFE68735190 [English]), available on the
Internet (go to
field).
Replacement
The drive intermediate circuit employs several electrolytic
capacitors. 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 an input power fuse failure or a fault trip.
Contact your local ABB representative if capacitor failure is
suspected. Replacements for frame sizes R5 and R6 are
available from ABB. Do not use other than ABB specified spare
parts.
392
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ACH550-01 User's Manual
Diagnostics and maintenance
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