12 NFS-320/E/C, NFS-320SYS/E Operations Manual — P/N 52747:E1 06/16/2011
Use of the Controls Control Keys
2.3 Control Keys
The control panel provides five Control Keys as described below:
2.3.1 Acknowledge/Scroll Display
Use the ACKNOWLEDGE/SCROLL DISPLAY key to respond to new alarm or trouble signals. When
pressed, the control panel does the following:
• Silences the panel sounder
• Changes all active LED indicators from flashing to steady
• Sends an Acknowledge message to the History buffer and installed printers, CRT-2 terminals,
and FDU-80 annunciators
• Sends a signal to silence the sounders on the FDU-80 and ACS annunciators
PRE-DISCHARGE Red Lights when any of the releasing zones have been
activated, but have not yet discharged a releasing
agent.
Turns off automatically when no releasing
zones are in the pre-discharge state.
DISCHARGE Red Lights when any of the releasing zones are active
and in the process of discharging a releasing
agent.
Turns off automatically when no releasing
zones are discharging a releasing agent.
ABORT ACTIVE Yellow Lights when an abort switch has been activated.
*
Turns off automatically when an abort switch
has been pressed and its timer is still
counting down.
FIRE ALARM Red Flashes when a non-acknowledged fire alarm
exists. Lights steadily after you acknowledge the
fire alarm.
Clear the alarm condition and reset the
system.
PRE-ALARM Red Flashes when a non-acknowledged fire Pre-Alarm
exists. Lights steadily after you acknowledge the
Pre-Alarm.
Clear the pre-alarm condition. (An Action
Pre-Alarm requires a system reset.)
SECURITY Blue Flashes when a non-acknowledged Security alarm
exists. Lights steadily after you acknowledge the
alarm.
Clear the Security alarm condition and reset
the system.
SUPERVISORY Yellow Flashes when a non-acknowledged Supervisory
condition exists. Lights steadily after you
acknowledge the event.
Clear the condition (Supervisory inputs
require a system reset if they are latching.
Refer to
Table 3.4 page 26 for latching
information.).
SYSTEM
TROUBLE
Yellow Flashes when a non-acknowledged system trouble
exists. Lights steadily after you acknowledge the
trouble.
Clear the trouble condition.
SIGNALS
SILENCED
Yellow Lights steadily after a fire alarm condition occurs
and after you press
SIGNAL SILENCE to silence all
outputs. Flashes to indicate that some
silenceable outputs are on and some are off.
Press SYSTEM RESET. DRILL will also turn off
the LED.
POINT
DISABLED
Yellow Lights when one or more system devices are
disabled.
Enable the device or remove the disabled
device from the system program.
* Activation of a Manual Release Switch will override Predischarge Delay and override an active Abort
Release Switch, resulting in an immediate agent release.
Indicator Color When Active To Turn Off
Table 2.1 Descriptions of System Status Indicator LEDs (2 of 2)
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