Maintenance 109
Control unit battery replacement
The control unit battery is necessary for the real-time clock (RTC). The life of the
battery is typically more than 10 years.
To replace the control unit battery:
1. Remove the first cover (refer to First cover on page 50).
2. Open the USB connector lid (refer to User interface on page 88).
3. Push the lever at the bottom of the control unit to release it.
4. Disconnect the cable from the back of the control unit.
5. Turn the battery cover on the back of the control unit counterclockwise.
6. Remove the battery cover.
7. Carefully remove the control unit battery.
8. Carefully install a new CR2032 battery in the control unit.
9. Put the battery cover in position.
10. Turn the battery cover clockwise to lock it.
11. Connect the control unit cable.
12. Put the control unit into the holder and push to lock it in position.
13. Close the USB connector lid.
14. Attach the first cover.
Spare part kits
Contact you local ABB service provider to order spare part kits.
Order code Item name Description
3N750000000A Fan kit Fan spare part kit (2 external fans and 1
internal fan)
3N750010000A PVS-AP-L Control unit Control unit spare part kit
3N750070000A SPD cartridges, ABB DC side replaceable surge protection
cartridge kit from ABB
3N750090000A SPD cartridges, Phoenix Contact DC side replaceable surge protection
cartridge kit from Phoenix Contact
3N7500A0000A Fuse kit 12 A, 16 pcs 12 A fuse spare part kit with 16 fuses
3N7500C0000A Fuse kit 15 A, 16 pcs 15 A fuse spare part kit with 16 fuses
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