Running Diagnostic Tests

When a problem occurs in the hub, the amber Fault LED comes on. A fault can occur for many reasons, including:

•Elevated internal temperature

•Power supply failure

•Fan malfunction

To determine the cause of the problem, run the hub self-test from the Main menu.

1.Set up an RS-232 connection between the hub and a PC or dumb terminal (see Setting Up a Connection to a PC on page 45 or Setting Up a Connection to a Dumb Terminal on page 46).

2.From the Main menu, enter 1 to reset the hub and run the self-test. If the hub fails the self-test, an error number is displayed; for example:

Status of Hub Controller self-test: 0200

A value of 0200 in the self-test represents a fan failure. Replace the fan module as described in Replacing the Fan Module on page 88.

Any other numeric value represents an internal hub failure. Internal parts are not replaceable. If an internal malfunction occurs, replace the hub.

WARNING

Do not attempt to open the hub chassis. Uninsulated parts inside the

 

chassis constitute a hazard.

3.After correcting any problems, enter 1 to reset the hub.

For normal hub operation, the Hub Controller self-test status is displayed as “passed.” For a child hub, the Hub Controller self-test status is displayed as “Unknown.”

64Running Diagnostic Tests