Unit installation

Chapter 6 Troubleshooting and Diagnostics FCD-E1 Installation and Operation Manual
6-16 Testing FCD-E1
Table 6-4. Troubleshooting Chart (Cont.)
Nº Trouble Symptoms Probable Cause Corrective Measures
6 Ethernet interface LINK indicator
not lit
1. No active station on
the LAN
Check that at least one station is active on
the LAN
2. Cable problem Check and replace if necessary the cable that
connects the 10BaseT connector to the LAN
3. Problem on the LAN Check LAN media
4. Defective FCD-E1 Perform power-up self-test and replace the
FCD-E1 if defective
6.5 Testing FCD-E1
The user-controlled test functions of FCD-E1 consist of diagnostic loopback tests.
You can run the tests from either the front panel or a control terminal. The
purpose of these loopback tests is to determine the source of a break in the data
flow. By checking a variety of data paths, a series of loopback tests can pinpoint
the source of the obstruction of data.
This section provides general instructions for running the tests, followed by a
description of each test. The test descriptions include the terminal commands and
LCD designations for each test.
Before executing a test, pay attention to the following:
• You should activate only one loopback at a time. However, FCD-E1 allows you
to activate a remote loopback on one link, and a local loopback on the other
link.
• If a loopback is already connected, the TEST indicator lights.
• If you try to connect a loopback while another loopback of the same type is
already connected, FCD-E1 displays an error message.
Operating Loopbacks from the Front Panel
For general instructions on using the FCD-E1 front panel, refer to Chapter 3.
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To activate or deactivate a specific test from the front panel:
1. Bring the cursor to the left-hand field in the top row (if it is not already there).
2. Scroll to display TEST OPTION in the top row; the right-hand field of the top
row indicates ML, meaning that the displayed loopback state pertains to the
main link. Second row shows the loopback type and its current state: ON or
OFF.
3. To change the link, bring the cursor to the right-hand field in the top row, and
scroll to display SL; the right-hand field of the top row indicates SL, meaning
that the displayed loopback state pertains to the sublink. Second row shows
the loopback type and its current state: ON or OFF.