MZX 125/250 Fire Detection Systems
20 Doc. version 1
The system will respond as follows:
1 The sounders will be silenced.
2The ‘SOUNDER ACTIVATED’ LED will extinguish.
3 All other outputs will remain activated.
4 The LCD display will remain showing the type of alarm and the full
zone identification. The ‘GENERAL’ display window will show
‘Sounder SIL’.
If it is required to manually resound the sounders, pressing the ‘SILENCE/
RESOUND’ key will reactivate the sounders.
3.4.3 RESETTING THE CONTROLLER
When the system is in a Fire Alarm state, Silence must be operated before
Reset is possible. This interlock is always present under Fire Alarm
condition, even if all sounders are isolated.
The controller should also NOT be reset until the source of the alarm has
been determined by the Fire Brigade or the cause otherwise found (and the
condition removed).
Once the notes above have been observed, press the ‘RESET’ key. The
display will show the following message:
Reset
in
Progress...
*
After 17 to 20 seconds, the LCD will return to the normal display (Section
2.3) if no faults or other events are present.
3.4.4 MULTIPLE EVENTS
If, when in alarm condition, a second alarm (of another zone) is received, the
system response is dependent on the nature and source of the second
alarm as follows:
1 If the sounders have NOT been silenced, the following will occur:
2 The internal buzzer will continue to sound without interruption.
3 The LCD will continue to display the alarm message for the FIRST fire
alarm and also the last fire alarm.
4 The alarm count will be incremented.
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