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NFS2-640/E Operations Manual —
P/N 52743:F1 06/16/2011
Operation of the Control Panel
CO Alarm Mode of Operation
3.10.2 How to Respond to a CO Alarm
If the control panel indicates a CO alarm, you can do the following:
•
To silence only the panel sounder:
Press the
ACKNOWLEDGE
/
SCROLL
DISPLAY
key. The local sounder will silence.
The control panel will send an acknowledge message to the LCD display, remote annunciators,
history buffer, installed printers, and CRT-2s.
•
To silence the panel sounder and any activated outputs that are programmed as silenceable:
Press the
SIGNAL
SILENCE
key. The
SIGNALS
SILENCED
LED will light steady.
The control panel sends an Signal Silenced message to the remote annunciators, history buffer,
installed printers, and CRT-2s. The figure below shows a sample Alarm Silenced message.
Figure 3.13 Sample Alarm Silenced Message
1.
Check the Alarm message for the location and type of trouble.
2.
Correct the condition causing the CO alarm.
3.
When you finish correcting the CO alarm condition, press the
SYSTEM
RESET
key to return the
control panel to normal operation (indicated by the “System Normal” message). The control
panel sends a “System Normal” message to the LCD display, History buffer and installed
printers, FDU-80 annunciators, and CRT-2s.
3.10.3 Interpreting CO Alarm/Supervisory Type Codes
The Type Code that displays in the CO Alarm message indicates the function of the point that
initiates the CO alarm. For example, a monitor module with a
CO
MONITOR
Type Code means that
the monitor module monitors a conventional CO detector. The table below lists the Type Codes that
can appear in an alarm message:
Status banner
Time and date of the
Alarm Silenced
S I G N A L S S I L E N C E D
0 3 : 1 2 P 0 3 1 5 1 1 T u e
Type Code
Latching
(Y/N)
Purpose
What it does
Monitor Modules
CO Monitor*
Y
Indicates activation of a CO conventional detector
Activates CBE, does not light an indicator
at the control panel.
Detectors
PHOTO/CO*
Y
Indicates activation of the Photo, Heat, or CO element of a
detector.
Lights
FIRE
ALARM
LED for photo and heat,
no LED will light for a CO alarm. Photo and
heat will activate CBE, CO alarm activates
special function zone FC and sixth CBE
zone only (sixth CBE zone programmable
via VeriFire Tools)
PHOTO/CO (P SUP)*
Y
Indicates activation of the Photo, Heat or CO element of a
detector.
Lights
FIRE
ALARM
LED for heat, no LED will
light for a CO alarm, supervisory LED will
light for photo alarm, heat and photo will
activate CBE, CO alarm activates special
function zone FC and sixth CBE zone only
(sixth CBE zone programmable via VeriFire
Tools)
Table 3.5 CO Alarm Type Codes (1 of 2)
