ABB ACS880-01 - Replacing the ZCU-12 Control Unit Battery; Replacing Safety Functions Modules (FSO-12, Option +Q973 and FSO-21, Option +Q972)

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3. Take the unit off.
4. Replace the unit in reverse order.
￭ Replacing the ZCU-12 control unit battery
The control unit battery is of type CR2032. For instructions on how to replace the control
unit battery, contact an authorized ABB service center.
Replacing safety functions modules (FSO-12, option +Q973
and FSO-21, option +Q972)
Do not repair safety functions modules. Replace a faulty module with a new one as
described in section Installing FSO-xx safety functions modules (page 115).
Maintenance 175