• Renewal of the whole drive and all optional functional safety module(s) and
components.
• Renewal of the components in the safety function circuit. In practice, this is
economical only with larger drives that have replaceable circuit boards and other
components such as relays.
Note that some of the components may already have been renewed earlier, restarting
their mission time. The remaining mission time of the whole circuit is however
determined by its oldest component.
Contact your local ABB service representative for more information.
Capacitors
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 Capacitor reforming instructions
(3BFE64059629 [English]).
Control panel
Refer to ACS-AP-I, -S, -W and ACH-AP-H, -W Assistant control panels user's manual
(3AUA0000085685 [English]).
176 Maintenance
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