D3-DU 3xx/A, /B Maintenance
Project engineering manual V1.09
97
© KEBA 2021
Caution
● Do not use force!
● Improper exchange of the battery, replacement of the battery by a differ-
ent type or non-observance of the polarity can lead to irreparable dam-
age to the battery.
● New batteries should not be touched with bare fingers because this
could cause contact problems due to oxidation.
● If the battery is not replaced when there is a warning message, the data
of the SRAM can be lost if the power supply is interrupted.
The battery is located in the battery case in the front panel.
Information
If it is necessary to disconnect the supply voltage, the retain data have to
be stored before changing the battery, to avoid data loss. Also the real time
clock on the control has to be configured new after changing.
The battery is placed underneath the cover flap. To change it proceed as fol-
lows:
1) Pull down locking (1) of the cover flap with a small item (e.g. small screw
driver). Open cover flap (2).
Fig.10-35: Open cover flap
2) If no power supply module is connected remove side covering by ex-
tracting it straightly out of the guide rail.
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