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NOTE ON BATTERY OPERATION
The system is equipped with a battery management system. The battery is continually checked for function and pos-
sible operating duration. In case of fault, the following conditions can be displayed.
- Accu < 10 hours
The current capacity of the rechargeable battery cannot ensure an alarm duration of at least 10 hours
The device must be charged for up to 8 hours with the mains voltage connected.
This display goes out on its own when there is enough capacity available.
- Accu down
The battery is flat.
The battery must be replaced.
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