FX-350/351 Series User Guide
3
The Buzzer and Common LED Indicators
Buzzer
The buzzer sounds if there is a fire alarm, a supervisory alarm, or a
trouble in the fire alarm system. It turns OFF if the condition causing
the buzzer to sound goes away or the Buzzer Silence button is
pressed. After being silenced, the buzzer will resound approximately
24 hours later if the condition did not clear.
AC ON LED
The green AC ON LED illuminates steadily as long as the main
power is above minimum level. The indicator turns OFF when the
level falls below the minimum level and the panel switches to
standby (battery) power.
Common Alarm LED
The red Alarm LED will illuminate steadily whenever there is a fire
alarm. This indicator will remain ON until the system is reset.
Common Supervisory LED
The amber Supervisory LED illuminates at the fast flash rate when
there is a supervisory alarm in the fire alarm system. For non-
latching supervisory alarms, the Supervisory LED will turn OFF when
the condition causing the alarm goes away. For latching supervisory
alarms, this LED remains ON until the panel is reset.
Common Trouble LED
The Trouble LED flashes amber at the trouble flash rate when the panel detects any trouble condition. For non-
latching trouble conditions, the Trouble LED will turn OFF when the condition causing the alarm goes away. For
latching trouble conditions, this LED remains ON until the panel is reset.
CPU Fault LED
The CPU Fault LED flashes amber at the trouble flash rate to indicate microprocessor failure on the main board.
Ground Fault LED
The Ground Fault LED flashes amber at the trouble flash rate to indicate a ground fault detection on the wiring.
Main Display Buttons and LEDs
System Reset Button
The System Reset button resets the fire alarm control panel and all circuits. The
System Reset LED turns ON steady for the duration of the reset operation.
COMMON ALARM
COMMON SUPV
COMMON
TROU BLE
CPU FAULT
GROUND
FAULT
AC ON
SYSTEM
RESE T
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