Operation
P/N 06-237041-001 4-13 February 2011
4-10.3.1 WHAT TO DO WHEN AN ALARM OCCURS
Press the <SYSTEM ACKNOWLEDGE> Key to change the Alarm LED from flashing to steady
illumination and to silence the internal buzzer.
It will be necessary to press the <SYSTEM ACKNOWLEDGE> Key once for each device in alarm if
multiple unacknowledged alarm events are present. All alarm acknowledgments are logged.
The LDC displays the acknowledged event for 10 seconds, and then returns to displaying the first
alarm.
The active alarms and acknowledged alarm-initiating devices can then be manually displayed, in the
format of Figure 4-23, in order of occurrence using the <SCROLL> Keys. A summary of the number
of active alarm events will be displayed at the conclusion of each manual scroll cycle.
4-10.3.2 ALARM SILENCING
Press the <SIGNAL SILENCE> Key to de-activate any silenceable outputs such as NACs and SLC-
based signal or relay modules after all alarms have been acknowledged. Outputs are configured as
silenceable through the FenwalNET 8000-ML Configuration Software. The control unit will display
the following message for 5 to 10 seconds.
Figure 4-24. Outputs Silenced Message
You may then manually scroll through the list of active and acknowledged alarm-initiating
devices by using the <SCROLL> Keys after the message in Figure 4-23 is displayed. A summary
of the number of active alarm events will be displayed at the conclusion of each manual scroll
cycle.
The Signal Silenced LED will illuminate when the <SIGNAL SILENCE> Key is pressed after all
alarms have been acknowledged. A subsequent press of the <SIGNAL SILENCE> Key will re-activate
any outputs that were silenced if no new alarm events have been reported since the outputs were
silenced. The Signal Silenced LED will also go out. This toggling capability will remain in effect until
the control unit is reset.
A silence command that caused all silenceable outputs to de-activate will be overridden by a
subsequent alarm report. All silenced outputs associated with the subsequent alarm-initiating device
will reactivate, and the Signal Silenced LED will go out. You will need to press the <SIGNAL
SILENCE> Key again to de-activate any active, silenceable outputs.
Note: There is a 10-second buffer period during which subsequent presses of the <SIGNAL
SILENCE> Key are intentionally ignored. A subsequent key press will only be acted upon
after at least 10 seconds have elapsed since the previous key press.
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