Siemens FDM275 Technical Manual page 40

Maintenance / Repair
7
Replacing the battery pack in the radio manual call point
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3. Loosen the two screws (2).
4. Remove the switching unit (2) with the connected battery pack (9).
5. Wait until the internal alarm indicator (6) flashes green (flashing pattern number
3 with interval of 2 seconds [➙ 18]).
a The radio manual call point is 'out of base'.
6. Remove the old battery pack (9).
– Release the battery connector (8).
– Dispose of the old battery pack.
7. Label the new battery pack with the current date.
8. Connect the battery connector (8).
a
The alarm indicator lights up red for 5 seconds.
a
After a further 10 seconds, the radio manual call point FDM275 signals that
it is no longer installed in the housing and the alarm indicator flashes green
(flashing pattern number 3 with interval of 2 seconds [➙ 18]).
a
If this does not happen, this means the battery pack is defective and must
not be used.
9. Lay the connection cable according to the diagram and snap the battery pack
in place in the three battery holders.
10. Insert the switching unit with the new battery pack into the back box and screw
it tightly in place.
11. The internal alarm indicator flashes green (flashing pattern number 4) [➙ 18]
and the radio manual call point FDM275 is logged on to the radio gateway.
12. Insert the glass or plastic insert.
a
If the process of logging on to the radio gateway is successful, the internal
alarm indicator stops flashing.
13. If the logon process has not been successful after a long period of time,
remove the switching unit from the back box and then re-insert it.
a
The search for the radio network starts again.
14. Install the housing cover on the back box.
– Hook the top housing cover into the back box.
– Snap the bottom housing cover into place in the back box.
a The battery pack has now been replaced.
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