Replacing The Ppcs Branching Unit (Apbu-Xx) Memory Backup Battery - ABB ACS800 Hardware Manual

Replacing the PPCS branching unit (APBU-xx) memory backup battery

WARNING! Read and follow the instructions in chapter
the instructions can cause physical injury or death, or damage to the equipment.
1. Switch off the power to the unit and open the main disconnecting device. Close
2. Let the intermediate circuit DC capacitors discharge for five minutes. Ensure by
3. Locate the branching units in the auxiliary control cubicle. Remove any shrouds.
4. Open the screws on the cover (3 pcs, indicated with arrows in the figure below).
5. Slide off the cover.
6. Remove the battery.
7. Insert the new CR 2032 battery and reattach the cover.
4
the grounding switch (option +F259) if there is one.
measuring that the drive is not live before starting the work.
5
Safety instructions. Ignoring
6
Maintenance
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