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ABB ACS880 Drive
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Sep 05, 2025 12:57 pm
Cause: Control unit battery comes when the battery of the control unit is low. The control unit in the ACS880 has a small battery, usually a lithium coin cell, that maintains the clock and some non-volatile memory when the drive is powered off.
A5F4 warning in ABB ACS880 drive indicates a control unit battery fault. This means the battery that powers the real-time clock and retains the drive's settings and event logs is at or near the end of its life.
Solution:
- Replace control unit battery.
- This warning can be suppressed using parameter 31.40.