Specifications

58 209351 REV B Operations Manual, Redundant System Controllers
4.7 Advanced system level troubleshooting with RCP
The RCP controller offers the ability to control various systems, which can include
various subcomponents. In some cases it is important to quickly pinpoint a faulty
component without system disintegration. The RCP controller offers such capabilities.
The following section describes the troubleshooting procedure for some systems.
4.7.1 Scenario 1
A 1:2 system contains devices connected to the RCP external port (SSPA) as well as
an array of LNA devices connected to the Plate assembly port. Major faults are
configured to track both types of fault. Fault logic is set to “High”. The RCP indicates a
Unit1 fault. To determine which component of the controlled setup is failed, scroll down
to System Info Page 4 and verify the status of the “LNA faults” and “SSPA faults”
items. One or both items should indicate “1----”.
If the faulted element is found in the LNA setup, the user can double-check what
caused it. Perform the following steps: Press the Main Menu key; select 6.Calibration
and press the Enter key; select 4.View CalPoints and press the Enter key. The VFD
will display the advanced LNA/LNB debugging screen, which will show calibration
points and current consumption for each LNA. Note the difference between the “LNA1
(mA)” and “Cal1(mA)” values displayed on the screen.
If the faulted element is found in the SSPA setup, double-check the fault causing the
problem by selecting Info page 5. Note the state of the “ExtFaults” item, which should
indicate “Aux-111 HPA001”. This explains why unit 1 was considered as faulted (note
logic “high” state “1” in “HPA001 “).
4.7.2 Scenario 2
In a 1:2 SSPA system with 5 auxiliary devices connected to the RCP external faults
port, the RCP utilizes “fault on high” logic. Auxiliary faults are enabled.
An auxiliary fault indicates “Fault” condition. To find which auxiliary line indicates fault,
browse to Info page 5. Note the value of “ExtFaults” item.
AUX-[Unit 3][Unit 2][Unit 1], where the “#” in “Unit #” is either “1” or “0”. A “0” indicates
a fault and “1” indicates no fault.
So if the value shown on the display is “AUX-011 HPA000”, that indicates a fault state
for auxiliary devices connected to auxiliary port lines 2 and 1.