Nautel VX150 - Page 28

RESPONDING TO ALARMS VX150 TO VX2 TROUBLESHOOTING MANUAL
PAGE 3.1.20 VERSION 2.0 2023-04-20
High Heatsink Temperature
Shutdown
The Heatsink Temperature meter has
exceeded 80°C in VX150 to VX1 models, or
110°C in VX1.5 to VX2 models for at least 1
minute.
This alarm will inhibit the RF output when
triggered to prevent component damage.
This alarm must be cleared by performing an
alarm reset in the Front Panel UI, AUI, or via
the transmitters discrete remote I/O.
Check site cooling.
Ensure the transmitter’s air intake is
unobstructed.
High Heatsink Temperature
Warning
The Heatsink Temperature meter has
exceeded 70°C in VX150 to VX1 models, or
100°C in VX1.5 to VX2 models for at least 30
seconds.
This alarm will clear automatically if the
Heatsink Temperature Meter falls below 65°C
in VX150 to VX1 models, or 95°C in VX1,5 to
VX2 models for at least 30 seconds.
This alarm is suppressed if the High Heatsink
Temperature Shutdown alarm is active.
Check site cooling.
Ensure the transmitter’s air intake is
unobstructed.
High RF Drive The RF drive power meter measuring power
out of the IPA is greater than the model
specific maximum drive limit.
The RF drive power meter measuring power
out of the IPA is less than the model specific
maximum drive limit.
Check IPA/PA connections to the System
Interface PWB and in VX1.5 and VX2 the
RF Drive Splitter PWB.
Power Cycle to transmitter to reset the
drive power control system.
High SWR The Transmitter’s SWR meter is greater than
1.4:1.
The Transmitter’s SWR meter reports less than
1.38:1.
This alarm is most likely caused by an
issue in the output transmission line or
antenna system.
Check for faults in transmission line or
the antenna system, measure load SWR
at the transmitter output.
High SWR Shutdown
The Transmitter’s SWR meter is greater than
3.0:1.
The presence of this alarm will inhibit RF
operation.
This alarm must be cleared by performing an
alarm reset in the Front Panel UI, AUI, or via
the transmitters discrete remote I/O.
This alarm is most likely caused by an
issue in the output transmission line or
antenna system.
Check for faults in transmission line or
the antenna system, measure load SWR
at the transmitter output.
Alarm Name Trigger Conditions Clear Conditions Troubleshooting