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Status LEDs
During an audible walktest, if a device remains latched in alarm (such as a Pull Station that is not
reset after activation), subsequent testing of devices on the same zone will not trigger the NACs.
Be certain to reset or clear each device after testing.
Silent Walktest
To perform a silent Walktest, press the Walktest button, then press the Alarm Silence button and
hold both for a minimum of two seconds. The Trouble, Walktest and Alarm Silence LEDs will
blink at a ¼ second rate.
A silent walktest will not activate the control panel Notification Appliance Circuits. All alarm and
trouble conditions must be observed using the LEDs at the control panel as described in the
previous sections.
Exiting Walktest Mode
Walktest mode can be exited by pressing and holding the Walktest button for a minimum of three
seconds or by pressing the Reset button. The time-out feature will cause the control panel to
automatically exit Walktest mode if no button presses have occurred for one hour.
4.3 Status LEDs
AC Power LED
A green LED that remains on while the AC power supply is within correct limits. If this indicator
fails to light under normal conditions, service the system immediately.
NAC Disable LED
A yellow LED that blinks to indicate that a Notification Appliance Circuit has been disabled using
the main circuit board DIP switches. The LED will turn on steady when the Acknowledge or
Alarm Silence button is pressed.
Zone Disable LED
A yellow LED that blinks to indicate that one or more alarm zones have been disabled using the
Zone Enable/Disable buttons. The disabled zone's trouble LED will also be on. The Zone Disable
LED will turn on steady when the Acknowledge or Alarm Silence button is pressed.
NAC Fault LED
A yellow LED that blinks to indicate that an NAC trouble condition exists in the system. The LED
turns on steady when the Acknowledge or Alarm Silence button is pressed.
System Trouble LED
A yellow LED that blinks to indicate that a system fault or abnormal condition exists and that the
fire alarm system may be inoperative. It turns on steady when the Acknowledge or Alarm Silence
button is pressed.
Power Trouble LED
A yellow LED that blinks to indicate an AC power, battery or charger trouble condition. It turns on
steady when the Acknowledge or Alarm Silence button is pressed.
Walktest LED
A yellow LED that blinks to indicate that the control panel is in Walktest mode. The Acknowledge
and Alarm Silence buttons do not affect the Walktest LED.
Alarm Silence LED
A yellow LED that turns on to indicate that an Alarm condition exists in the system but the
Notification Appliance Circuits and the local piezo sounder have been silenced.
Flex 402 & Flex 404 Instruction Manual — P/N 52194:D4 3/27/2015
Operating Instructions
39
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