Nautel GV30N, Troubleshooting Manual

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GV30N TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
PAGE 4.1.14 VERSION 0.1 2014-11-01
Controller: PA Pwr
Foldback (Per PA
Foldback) Output Network
(amber) This alarm occurs if the control system determines that the calculated
dissipation in any FET on a PA is above the high dissipation threshold
(350 W), or the forward power being requested from an individual PA
[calculated as output power - combiner losses] is greater than the PA
output high threshold (850 W). The forward power of the transmitter will be
limited to a level such that neither of these thresholds are exceeded. Check
for associated alarms. Typically, the assertion of this alarm is the result of a
PA failure or RF power module removal, or a high SWR condition.
Controller: Power
Amplifier Summary - Not displayed in AUI or UI status. Configurable as a remote output.This
alarms occurs if there are any alarms present that are related to the power
amplifiers. Check for associated alarms, and follow the associated
troubleshooting procedure, if present.
Controller: Power
Discrepancy Output Network
(amber) This alarms occurs in conjunction with the Combiner Match alarm to
indicate unaccounted for RF power in the combiner.
Controller: Power
Supply Summary - Not displayed in AUI or UI status. Configurable as a remote output.This
alarms occurs if there are any alarms present that are related to the power
supplies. Check for associated alarms, and follow the associated
troubleshooting procedure, if present.
Controller: PS Current
Foldback (PS Curr
Foldback) Power Supply (amber) This alarm occurs if the transmitter is limiting its output power to avoid
drawing excessive current (48 A per supply) from the power supply
modules. This may occur when there are PA failures and the transmitter is
attempting to compensate to attain the setpoint level. Check for associated
alarms, and follow the associated troubleshooting procedure if present.
Controller: Rack #
Fault Power Amplifier (red) This alarm indicates that a critical fault has occurred in the associated rack,
resulting in the transmitter’s RF output being inhibited. Check for
associated alarms to continue troubleshooting.
Controller: Rack # Not
Responding (Rack #
Offline) Power Amplifier (red) This alarm occurs if serial communication is lost with the associated rack
controller (module control/interface PWB). This will inhibit the transmitter’s
RF output, since this connection is used for monitoring power and adjusting
the PA voltage. Check all connections between the controller and the rack.
If the alarm persists, suspect a fault with the associated rack’s controller
(module control/interface PWB).
Controller: Rebooted
Exciter Exciter (red) This is an informational alarm only that is displayed when the watchdog
timer reboots the acontroller’s main microcontroller (DSP) or on an ac
power interruption.
Controller: Reboot
Required (Need
Reboot for Settings) Exciter (red) This alarm indicates that exciter setup changes have been made, typically
via the System Settings page of the AUI. Typically, the DSP will reboot itself
automatically; however, if this alarm persists for more than five minutes,
cycle the transmitter’s ac power (off, then on) to store the changes.
Device and
Alarm Name
(AUI, UI)
Controller Front
Panel LED (color)
Description and Troubleshooting Action