Led Indicators; Normal Operation - Honeywell MS-5UD Series Manual

4.2 LED Indicators

The five 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.
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.

4.3 Normal Operation

With no alarms or troubles in the system, the display message is System All Normal along with the
current time and date as shown below. To set the time and date, refer to the appropriate section in
this manual.
The FACP performs the following functions at regular intervals in Normal mode:
Monitors AC input voltage and battery voltage
Monitors and reports status option cards and control panel
Refreshes LCD display and updates time
Scans control panel keypad for key presses
Tests memory
Updates and reads all communications busses (EIA-485, etc.)
i
into Normal mode. Thereafter, each device will be polled every hour for freeze and every
four hours for maintenance conditions
Note: To ensure that the system is functioning properly, the FACP will perform a freeze check five
minutes after the panel is reset, followed by a maintenance check. If there is no freeze or
maintenance condition, the panel will continue to monitor for freeze conditions every hour and
maintenance conditions every four hours.
MS-5UD/MS-10UD Series PN 52626:B 8/01/2008
SYSTEM ALL NORMAL
10:00A 070707
3 smoke detectors will be polled for maintenance and freeze conditions on initial entry
Operating Instructions
109