12 Maintenance
12.1 Backup battery replacement
The internal backup battery lifetime is approx. 10 years. Replace the battery if the alarm Low
BackupBatt occurs. Follow these instructions:
1. Connect the controller to a PC and save an archive for backup purposes.
2. Disconnect all terminals from the controller and remove the controller from the switchboard.
3. Release the rear cover using a flat screwdriver or other suitable tool.
4. Remove all plug-in modules.
5. The battery is located in a holder on the circuit board. Remove the old battery with a small
sharp screwdriver and push the new battery into the holder with your finger. Use only a
CR1225 lithium battery.
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