Troubleshooting is the process of isolating the cause of a problem so that corrective
action can be taken. Steps in this process narrow the focus of attention to the problem
area. Documentation at each step in the process provides a valuable aid for further
analysis.

NOTE:

The steps below should be completed by a qualified technician.

These steps assume that the technician will follow basic circuit
troubleshooting logic or contact Customer Service when in doubt. Keep
written records for each action taken to aid in re-creation if necessary.

LED Alerts

Front panel LED displays provide alerts by module as summarized in the table on
“Summary of Front Panel LEDs” on page

8-44

. Each LED is labeled for identification.

LEDs are basic three-color displays: red, amber, green. The basic LED interpretation
follows accepted practice of green for normal operation; amber for minor alert; and
red for major alert.