F4000 LCD Operator's Manual Document No: LT0117
Operating Instructions - Brigade Functions
Page 5-8 19 April 2002 Issue 2.38
5.6 ISOLATING/DE-ISOLATING BELLS
5.6.1 FUNCTION
The isolate status of the bells can be changed at any time by pressing the "BELL ISO" key.
The status of the Bells isolation is shown on the "BELLS ISOLATED" LED as per Section
4.3.7. If the LED is on steady, slow flashing or 2Hz flashing, the bells will not sound. If the
LED is OFF the bells will sound when an un-isolated alarm is present.
Isolating the bells can serve as a method to silence the bells whilst un-isolated alarms still
exist.
De-isolating the bells allows the bells to turn on for subsequent alarms occurring, and can
serve to immediately turn the bells on again if any un-isolated zone alarm condition exists.
For New Zealand mode F4000 FIPs, the Bells Isolate LED flashes if a Silence Alarms
keyswitch has been turned on at the FIP, (2Hz flash), or at any RZDU or Networked FIP
(slow flash). Pressing the "BELLS ISO" key will change the isolate state stored within the
FIP, but the Bells Isolated LED will remain slow or 2Hz flashing until the Silence Alarms
keyswitch is turned off. At that time, the "BELLS ISOLATED" LED will turn OFF if the bells
are not isolated by the keypad, or ON if the bells are isolated by the keypad.
In Australian or New Zealand network systems, isolating the bells on the local FIP may result
in the bells on other FIPs being silenced, depending on how the system has been
configured.
5.6.2 OPERATING SEQUENCE
Press the "BELLS ISO" key once:
- If the bells were un-isolated:
- The BELLS ISOLATE LED turns ON.
- The bells, if ON, turn OFF.
- If the bells were isolated:
- The BELLS ISOLATE LED turns OFF.
- If any un-isolated alarm condition exists the bells turn ON.
NOTE:
If any subsequent alarm occurs, the bells will turn ON only if the bells are un-isolated, or for
New Zealand mode FIPs if the bells are un-isolated and are not silenced.
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