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NFS2-640/E Operations Manual — P/N 52743:F1 06/16/2011 13

Control Keys Use of the Controls

You can also press this key to display multiple alarms or troubles. If more than one alarm or trouble

exists, the control panel displays the next alarm or trouble for 3 seconds (or until you press the

ACKNOWLEDGE/SCROLL DISPLAY key), then displays the next alarm or trouble.

2.3.2 Signal Silence

Use the SIGNAL SILENCE key to silence the panel sounder and turn off all audio and visual devices

connected to Notification Appliance Circuits. When pressed, the control panel does the following:

• Turns off the panel sounder

• Turns off all silenceable output circuits

•Lights the SIGNALS SILENCED LED

• Sends a SIGNALS SILENCED message to the History buffer and installed printers, CRT-2

terminals, and FDU-80 annunciators

Partial Signal Silence

When some active outputs are silenced and others remain constant, the SIGNALS SILENCED LED

will flash.

2.3.3 System Reset

Use the SYSTEM RESET key to reset the control panel. When pressed, the control panel does the

following:

• Clears ALL active inputs

• Interrupts resettable power

• Sends a “System Reset” message to the History buffer, and installed printers, CRT-2 terminals,

and FDU-80 annunciators

• Decouples from Noti•Fire•Net, if connected, for 60 seconds to allow Cooperative Control By

Event (CCBE) to clear.

If any alarm or trouble exists after you press the SYSTEM RESET key, all NACs, control outputs, and

panel audio and visual indicators will reactivate.

2.3.4 Drill

Use the DRILL key to manually activate all silenceable outputs and Notification Appliance Circuits.

To prevent accidental activation, you must press the

DRILL key for 2 seconds. When pressed, the

control panel does the following:

• Turns on all silenceable NACs

NOTE: If Local Control is set to “0” (No Control), the FACP will not respond to ACKNOWLEDGE,

and the piezo will not sound.

NOTE: If Local Control is set to “0” (No Control) or “2” (Partial Control), the FACP will not

respond to SIGNAL SILENCE.

NOTE: Trouble conditions will not clear and re-report upon reset.

NOTE: If Local Control is set to “0” (No Control), the FACP will not respond to SYSTEM RESET.

Notifier NFS2-640/E User Manual

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