7 Service
In case of faults or service tasks it is recommended to contact a service technician or the safe
manufacturer. On the inside of the top part of the input unit, there is the production data.
This data is useful for a first phone consultation or in case of service for an initial fault
localization.
Label with production data
7.1 Power supply
2 batteries of type AAA are available for the input unit for power supply of the lock. It is highly
recommended to replace the batteries every 2 years, irrespectively of how often the lock has
been used.
As soon as the status message 'low battery' is displayed, it is still possible to open the lock,
but it is not possible to reconfigure the lock until after the battery replacement. An audit
entry is created. As soon as the battery is almost completely exhausted, it is not possible to
open the lock and every key press is acknowledged with an undervoltage signal.
Permanent power supply
If necessary, along with the battery power supply it is also possible to supply the lock with
voltage permanently. There are 3 options available for this purpose:
• Power supply via the intrusion detection system and the alarm box
• Power supply via the alarm box for the connection to the signaling equipment without
power supply, option via the additional 12V power supply unit at the alarm box
• If the lock is used without any signaling equipment: 9V power supply can be connected
directly to the lock.
Service User Manual
38 - 02/2022dormakaba Combi B 90 with metal input unit
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