Loudspeaker line isolator system
Troubleshooting | en
29
Bosch Security Systems B.V.
Installation manual
2021.07.28 | V1.00 |
6.2.3
Open T-Branch
If 47 kΩ EOL resistor on T‑Branch is missing, FIM with EOL monitoring will detect T‑Branch
open. In this case both
A
and
B
indicators will blink fast orange alternately with 2 seconds
intervals. Both relays of the FIM are open, creating an interruption in the loop. T‑Branch is
isolated from the loop.
See
PRA-LIM (FIM) Indicators, buttons and connections, page 11.
Possible solution
Reconnect the T‑Branch line to FIM, including 47 kΩ EOL resistor. When the problem is fixed,
the fast blinking indication on FIM will turn slow. Now you can reset FIM to
QUIESCENT
mode,
where both
A
and
B
relays are closed. To reset FIM:
1.
Push
RESET
button on the FIM module. Or,
2.
send REMOTE FIM RESET command by pressing RESET button on LDB for 10 seconds or
via Sniffer application.
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