ABB PVS800-57B, Maintenance Manual, Page: 74 / 78

74 Maintenance
Memory unit
When you replace the BCU-12 control unit, you can move the memory unit to the new
control unit to keep the firmware and parameter settings.
WARNING! Do not remove or insert the memory unit when the control unit is
powered.
To remove the memory unit, loosen the fastening screw and pull the memory unit out.
Replacing the BCU control unit battery
Replace the real-time clock battery if the BATT LED is not illuminated when the control unit
is powered on.
1. Loosen the fastening screw and remove the battery.
2. Install the new BR2032 battery.
3. Dispose of the old battery according to local disposal rules or applicable laws.
4. Set the real-time clock.
Replacing the control panel battery
1. Turn the lid on the back of the panel counter-clockwise until the lid opens.
2. Replace the battery with a new CR2032 battery.
3. Put the lid back and tighten it by turning it clockwise.
4. Dispose of the old battery according to local disposal rules or applicable laws.
Spare parts
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Storing spare parts
Make sure that the spare parts are stored properly.
When not being actively worked on, store the spare parts in their original containers or
bags, if it is possible.