2. Use of the Controls
System Status Indicator LEDs
16
NFS-640 Operations Manual P/N 51334:B 10/03/2003
System Status Indicator LEDs
The control panel contains eight LEDs with labels as shown below:
Figure 2 System Status Indicator LEDs
Descriptions:
Table 3 Descriptions of System Status Indicator LEDs
Indicator
Color
When Active
To Turn Off
POWER
Green
Lights when the proper primary AC
power is applied. Remains lit while
power is applied.
Always lit with AC power applied.
F
IRE
A
LARM
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 6 page
30 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 after a fire alarm condition occurs
and after you press
SIGNAL
SILENCE
.
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.
FIRE
ALARM
PRE-ALARM
SECURITY
SUPERVISORY
SYSTEM
TROUBLE
POINT
DISABLED
SIGNALS
SILENCED
POWER
NFS640-keypad1.cdr
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