Instruction manual

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting
555-650-140
Issue 1
June 1997
Introduction
Page 1-23
Maintenance Strategy
If an LED is programmed to indicate the alarm, the LED stays lit until the error is
cleared.
When the system indicates an alarm, check the permanent error log screen.
Clearing Alarms
The system clears alarms automatically when the error condition no longer
exists.
To clear an alarm manually, select Drop on the MLX-20L console or
+ on
a PC while viewing the error. See ‘‘
Error Logs’’ in Chapter 2 for more
information.
System Restarts
Depending on the severity and duration of a problem, you may need to restart
the system manually. Some errors cause the system to restart automatically.
Every restart causes an error log entry, and each type of restart has its own
error code. A cold start (Restart) or frigid start (System Erase) also causes a
C
or
F to appear on the error code/status display on the processor module.
There are three types of system restarts, all of which occur automatically:
■ Warm start (you cannot select this from the Maintenance menu)
■ Cold start (select Restart to do this manually)
■ Frigid start (select System Erase to do this manually)
Warm Start
A loss of power for less than 250 ms can cause a warm start. If this occurs, calls
in progress are not dropped, but calls in the process of being connected may be
dropped.