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SECTION 4 Operating Instructions4.1 Panel Control Buttons4.1.1 Acknowledge/Step
The first press of the Acknowledge/Step key silences the piezo sounder, changes flashing
LEDs to steady and also changes the status field on the LCD display from capital letters to
small letters. When the piezo is silenced, an acknowledge message is sent to the printer
and the history file. Multiple active events are scrolled on the display at a three second
rate. Acknowledge also sends a silence piezo command to the optional annunciators
connected to the FACP.
When more than one event exists, the first press of the Acknowledge/Step key functions as
described in the preceding paragraph. The second press of the key stops the scrolling and
holds the event on the display for one minute. Subsequent pressing of the key steps
through each active event.
4.1.2 Alarm Silence
The Alarm Silence key performs the same functions as Acknowledge/Step. In addition, if
an alarm exists, it turns off all silenceable NACs (Notification Appliance Circuits) and
causes the Alarm Silenced LED to turn on. It also sends an ‘alarm silenced’ message to
the printer, history file and optional annunciators. A subsequent new alarm will resound
the system NACs. Note that the Alarm Silenced LED is turned off by pressing the Reset
key, the Drill key or subsequent activation of the NACs.
4.1.3 Drill/Hold 2 Sec
When the Drill key is held for a minimum of two seconds (time required to prevent
accidental activations), the FACP turns on both main panel NAC outputs and all
silenceable circuits such as control modules that are programmed as silenceable, and turns
off the Alarm Silenced LED if it was previously on. The EVAC IN SYSTEM message is
shown on the LCD display. The same message is sent to the printer and history file. The
Alarm Silence key can be used to turn off all silenceable NAC outputs following activation
by the Drill key.
4.1.4 Reset
Pressing and releasing the Reset key turns off all control modules and NACs, temporarily
turns off resettable power to 4-wire detectors, causes a RESET IN SYSTEM message to be
displayed on the LCD and sends the same message to the printer and history file. It also
performs a lamp test by turning on all LEDs (except the Ground LED), piezo sounder and
LCD display segments after the Reset key is released. Any alarm or trouble that exists
after a reset will resound the system.