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4.2 LED Indicators
The nine LED indicators, which are located on the front panel, operate as follows:
AC Power
This is a green LED which illuminates if AC power is applied to the FACP. A loss of AC
power will turn off this LED
Fire Alarm
This red LED flashes when one or more alarms occur. It illuminates steady when the
Acknowledge/Step or Alarm Silence key is pressed. The Fire Alarm LED turns off when
the Reset key is pressed. The LED will remain off if all alarms have been cleared.
Supervisory
This is a yellow LED that flashes when one or more supervisory conditions occur, such as
a sprinkler valve tamper condition. It illuminates steady when the Acknowledge/Step or
Alarm Silence key is pressed. It turns off when the Reset key is pressed and remains off if
all supervisory alarms have been cleared.
Trouble
This is a yellow LED that flashes when one or more trouble conditions occur. It stays on
steady when the Acknowledge/Step or Alarm Silence key is pressed. The LED turns off
when all trouble conditions are cleared. This LED will also illuminate if the
microprocessor watchdog circuit is activated.
Maintenance
This is a yellow LED that flashes to indicate that a smoke detector requires cleaning or
replacement due to an invalid chamber reading or excessive drift.
Alarm Silenced
This is a yellow LED that turns on after the Alarm Silence key is pressed while an alarm
condition exists. It turns off when the Drill or Reset key is pressed.
Disabled
This is a yellow LED that flashes to indicate that a zone, NAC, detector or module has
been temporarily disabled in programming by the user.
Battery
This is a yellow LED that flashes to indicate a low battery voltage condition.
Ground
This is a yellow LED that flashes to indicate a ground fault condition.