SDN and ACC System Level Troubleshooting
3-7
2. Check the FIRE AXE LED to see if it is still lit and then replace the
RJ45 connector.
3. Check the next branch.
SDN and
Non-SDN Related
Problems
Refer to the following table for SDN and non-SDN related problems.
Action
• If a product malfunction has been clearly identified, then
troubleshoot that product (or non-SDN subsystem, such as an IC and
recorder) according to the troubleshooting procedures specified in
the associated product’s service manual.
Note
It is highly recommended that the instrument(s) be disconnected from the
SDN during troubleshooting. SDN connections between ICs should be
disconnected when troubleshooting one IC in an IC group if the others are
remaining connected to the network.
• If the FIRE AXE LED in the ACC is illuminated or flickering, look for
a noisy branch. See “Cable Verification Procedures” on page 3-13.
• If SDN communication errors are indicated, and if no specific
product is immediately identified, then go to “STEP #3: Evaluate the
Breadth of the Problem” on page 3-8.
SDN Related Problems Non-SDN Related Problems
•
Instrument missing on
Network Test
•
Wrong status code for
instrument on Network
Test
•
SDN Error Codes:
0 - - - 8 - - - Monitor/
Terminal
5- - - D- - - IC
•
Instrument not SDN connected
•
*Product error codes, but none of which
are
0 - - - 8 - - - Monitor/Terminal
5- - - D- - - IC
*If SDN error codes and non-SDN error codes occur, both subsystems must be
considered
•
Loss of data from one SDN
instrument to another
•
OVERFLOW or FIRE AXE
LED illuminated in the
ACC
•
Loss of data at its source
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