Chapter 1: Introduction
P/N 3102309-EN • REV 001 • ISS 18JUL19 5
Control/Indicator Description
Note: If the local control unit is part of a command center, the lamp test is also executed
on all nodes within the command center.
System Function 1, System Function 2, System Function 3, or System Function 4:
Pressing the System Function button activates the response programmed for function.
The LED turns on as white while the button is pressed. When the button is released, the
LED is on steady as yellow, indicating that the command function is active, and turns off
when the function ends.
None: No action assigned.
Alarm Silence button and
LED (button three)
Pressing the Alarm Silence button turns off the EVAC and ALERT channels, and all
active audible and visible NACs if configured. Pushing the button a second time turns the
notification appliance circuits back on. This button may be used to cancel the drill signal.
The Alarm silence LED turns on as white while the button is pressed. When the button is
released, the LED is on steady as yellow, indicating that the active notification appliance
circuits have been silenced, and turns off when the system returns to normal.
Note: Project configuration settings affect the operation of the Alarm Silence function.
Reset button and LED
(button four)
Pressing the Reset button activates the system’s reset sequence to restore the system to
normal.
The Reset LED turns on as white while the button is pressed. When the button is
released, the LED flashes as green quickly during the smoke power-down phase,
slowly during the power-up phase, is on steady during the restoral phase, and turns off
when the system has reset.
Notes
• The Reset button is disabled as long as the alarm silence inhibit timer is running.
• The Reset button does not affect disabled points or manually overridden functions.
LCD screen indications
The LCD screen on the user interface provides information relevant to the current functional condition of the
control unit. There are two screen modes: system normal and system off-normal (Figure 2 on page 6).
System normal screen: System normal means that the control unit is in the normal (standby) state. In this state,
the LCD screen is clear of any event messages. Only the time, date, system normal graphic, and Action buttons
are displayed.
System off-normal: System off-normal means the control unit has changed to the alarm, trouble, supervisory,
monitor, disabled, or test state. In this state, the screen displays event messages that provide details about what
is happening in the system. The LCD screen displays the eight most recent highest priority events at one time.
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