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Capacitors of the DC circuit
The intermediate DC circuit of the drive contains several electrolytic capacitors.
Operating time, load, and surrounding air temperature have an effect on the life of
the capacitors. Capacitor life can be extended by decreasing the surrounding air
temperature.
Capacitor failure is usually followed by damage to the unit and an input cable fuse
failure, or a fault trip. If you think that any capacitors in the drive have failed, contact
ABB.
Reforming the capacitors
￭
The capacitors must be reformed if the drive has not been powered (either in storage
or unused) for a year or more. The manufacturing date is on the type designation label.
For information on reforming the capacitors, refer to
(3BFE64059629
[English]).
Replacing the capacitors
￭
See separate service manual by ABB Service.
Control panel
Refer to
ACS-AP-I, -S, -W and ACH-AP-H, -W Assistant control panels user's manual
(3AUA0000085685
[English]).
Maintenance 123
Capacitor reforming instructions
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