Nautel VS1, Руководство по устранению неисправностей

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VS1 Troubleshooting Manual Responding to alarms
Issue 10.0 2018-10-29 Page 1-23
Reject
Foldback
Output Network
(amber)
This alarm occurs if the control system determines that the
calculated power in any reject resistor exceeds the reject power
foldback threshold (185 W). The forward power of the transmitter
will be limited to a level such that this threshold is not exceeded.
This alarm should be accompanied by a
High Reject
alarm.
Check for other associated alarms, and follow the associated
troubleshooting procedure if present. Typically, high reject power
is the result of a PA failure or removal. If no other alarms are being
indicated, contact Nautel for further support.
Reject
Shutback
Output Network
(red)
This alarm occurs if the control system determines that the
calculated power in any reject resistor exceeds the reject power
shutback threshold (222 W). This alarm will initiate an immediate
shutdown of the transmitter's RF output. The transmitter will then
attempt to turn RF on and increase the forward power of the
transmitter to a level such that the reject foldback threshold is not
exceeded. This alarm should be accompanied by a
High Reject
alarm and possibly a
Reject Foldback
alarm. Check for other
associated alarms, and follow the associated troubleshooting
procedure if present. Typically, a reject shutback is the result of a
sudden PA failure. If no other alarms are being indicated, contact
Nautel for further support.
Residual PA
Volts Present
(Residual PA V
Pres)
PS (red) This alarm indicates that after the transmitter has turned off its RF
output, it is unable to discharge the PA volts to a level that is
below 3 V. This condition will not allow the transmitter to turn on its
RF output; however the condition will be cleared once the PA volts
reaches a level that is below 3 V. This condition will typically occur
with a failed PA or power supply module. Check for associated
alarms and follow the associated troubleshooting procedure, as
applicable. If no associated alarms are present, suspect the PS
distribution PWB (A2) or the exciter/control PWB (A1).
Running Bias
Routine
- This is an informational alarm only that is displayed when the bias
routine has been initiated.
SCA1 Low Exciter (amber) This alarm indicates the SCA 1 input level is too low or is not
applied. The VS1 takes no action on this alarm.
SCA2 Low Exciter (amber) This alarm indicates the SCA 2 input level is too low or is not
applied. The VS1 takes no action on this alarm.
Alarm Name
AUI and
(Front Panel)
Front Panel
LED (color)
Description and Troubleshooting Action