NV5LT/NV3.5LT TROUBLESHOOTING MANUAL
RESPONDING TO ALARMS
PAGE 4.1.22
VERSION 3.3 2016-03-10
Exciter A/B: SWR
Shutback
Exciter (red)
This alarm occurs if there is a sudden increase in the reflected power sensed
by the exciter due to an external condition (e.g., open or shorted RF drive
cable). The exciter’s RF output is reduced to 0 W. The threshold for this
alarm is typically set to 75 W. Check the connection and the RF load at the
exciter’s output.
Exciter A/B:
Temperature
Summary Alarm
-
Not displayed in AUI or UI status. Configurable as a remote output. This
alarm occurs if there are high temperature related alarms occurring. Check
for specific temperature related alarms and troubleshoot accordingly.
Exciter A/B: Unsigned
DSP Image (Bad DSP
Image)
Exciter (red)
This alarm indicates that the exciter is operating with ‘unsigned code’, but
is otherwise operational. This alarm may only be displayed if the transmitter
is operating with a ‘beta’ version of factory software.
Exciter A/B: Unsigned
FPGA Image (Bad
FPGA Image)
Exciter (red)
This alarm indicates that the exciter is operating with ‘unsigned code’, but
is otherwise operational. This alarm may only be displayed if the transmitter
is operating with a ‘beta’ version of factory software.
Exciter A/B:
Unsupported Audio
Configuration
Exciter (red)
This alarm indicates that the user has selected a preset configuration for the
audio processing in the exciter that cannot be implemented. This may be
due to attempting to use the same physical input for multiple purposes, or
because two incompatible modes have been selected.
Exciter A/B: +15V
Fail, -15V Fail
Power Supply (red)
This alarm occurs if the +15 V or -15 V power supply in the controller is 2 V
higher or 2 V lower than the desired value.
Exciter A/B: +5V A or
B Fail, +3.3V Fail,
+1.8V Fail, +1.2V Fail
Power Supply (red)
This alarm occurs if the associated power supply in the exciter is 10%
higher or 10% lower than the desired value.
Module #: Fan 1-6 Fail Power Amplifier
(amber)
This alarm occurs if the module fans have been enabled, but the fan
tachometer measurement is below 2200 RPM. Inspect the affected fan and,
if necessary, replace it (see
“Module Cooling Fan Replacement” on
).
Module #: Fan Fail
Shutdown
Power Amplifier (red) This alarm occurs when more than one of the module’s six fans have failed.
The module will shut down. Failed fans must be repaired or replaced before
the module can operate. Check for associated Fan 1-6 Fail alarms and
troubleshoot accordingly.
Module #: Fan Volts
Fail (Fan V Fail)
Power Supply (red)
This alarm occurs if the associated module’s cooling fan supply voltage is
10% high or 10% low. This may be the result of a circuit fault on the
module control/interface PWB.
Device and
Alarm Name
(AUI, UI)
Front Panel LED
(color)
Description and Troubleshooting Action
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