FTS 371 USER MANUAL
Flash Technology, LLC
Revision 4 – 9/7/2021
36
ALARM INDICATORS
Table 4.3 – Alarms Indicator Names and Descriptions
Alarm Indicator
Name
Description
Resolution
BEACON ALARM
The controller has detected that the beacon
output circuit is not drawing the proper
amount of current for the selected
configuration. If the controller’s configuration
matches the actual setup of the system, then
this alarm indicates that one or more
connected FTS 371 FH beacons have failed.
1.
Confirm that the controller is properly
configured
2.
Replace the failed beacon(s)
MARKER ALARM
The controller detects fewer operating
markers than its configuration. If the
controller’s configuration (MARKER #) matches
the actual setup of the system, then this alarm
indicates that one or more of the connected
MKR 371 / MKR 372 IR lights have failed.
1.
Confirm that the MARKER #
configuration dial is set to the actual
number of connected markers
2.
Replace the failed marker lights
PHOTODIODE
The controller has detected the absence of a
mode change in the last 19 hours. This could
indicate the failure of the photodiode.
1.
Visually confirm that the photodiode
is properly connected
2.
Perform the
(page 16).
3.
If the alarm persists, replace the
photodiode
4.
If the alarm persists replace PCB1
CONFIG ERROR
The controller has identified that the current
configuration settings are invalid.
1.
Confirm that the configurations
settings are correct and valid.
FLASHHEAD/BEACON LED INDICATORS
Indicator LEDs on the PCB provide status information helpful in troubleshooting.
Table 4.4 – Beacon LED Indicators Descriptions
LED
Indication
Power
Steady on to indicate the board’s 5V power supply is on.
AC Sense
On when AC/DC source power is applied to the Beacon. When powered by FTS 371
controller, this LED will flash corresponding to the on/off pulsing power from the controller
that communicates flash type and specification.
Flash
On when the LED strings are On.
Fault
On when a fault is detected on either beacon LED string. Turns on and off each flash cycle.
When 4 consecutive flash cycle faults are detected, the beacon LED strings turn off until the
next day to night transition or after removal of applied power for more than 30 seconds.
ICAO
On when the board is running in ICAO mode. Off in FAA mode.
