VX150 TO VX2 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
VERSION 2.0 2023-04-20 PAGE 3.1.19
FPGA Failure The FPGA was either not programmed or
failed to respond after being programmed as
part of the configuration process that occurs
when the Exciter starts up.
The FPGA responded after being programmed
as part of the configuration process that
occurs when the Exciter starts up.
The likely causes are a missing or corrupt
FPGA image file as a result of a damaged
SD Card. Either replace the SD Card or
perform a Software Update to install a
new FPGA image.
The next most likely cause is a damaged
FPGA. Consider replacement of the
Exciter PWB. See
Exciter PWB
Replacement on page 3.1.37.
Display Failure The front panel display module has not
completed a successful update in at least
150us.
This alarm will clear immediately on a
successful update of the display.
Check display connections and verify
display operation locally.
Consider replacing the display if
unresponsive. See
Front Panel User
Interface (FPUI) Display
Replacement on page 3.1.54.
High Ambient Temperature
Shutback
The Ambient Temperature meter has
exceeded 55°C for at least 1 minute.
This alarm will temporarily inhibit RF until
cleared to protect the transmitter from
overheating.
This alarm will clear automatically if the
Ambient Temperature meter falls below 50°C,
restoring RF operation
Check site cooling.
Ensure the Transmitter’s air intake is
unobstructed.
High Ambient Temperature
Warning
The Ambient Temperature meter has
exceeded 50°C for at least 30 seconds.
This alarm will clear immediately if the
Ambient Temperature meter falls below 45°C.
This alarm will be suppressed if the High
Ambient Temperature Shutback Alarm is
active.
Check site cooling.
Ensure the transmitter’s air intake is
unobstructed.
High Forward Power The Forward Power meter exceeds 110% of
the Output Power setpoint for at least 1
second.
The Forward Power meter is less than 110%
of the Output Power Setpoint for at least 1
second.
This alarm may trigger when
substantially reducing the transmitter’s
setpoint.
If the alarm is persistent or reoccurring,
AC cycle transmitter. If the behavior
persists contact Nautel.
Alarm Name Trigger Conditions Clear Conditions Troubleshooting
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