MN.00356.E - 003 99
Section 5.
MAINTENANCE
13 ALARMS
13.1 GENERAL
In this document a description of alarms is present, in order to help operators to perform equipment trou-
bleshooting.
13.2 ALARMS SYSTEM
There are two way to detect alarms:
•through LEDs
• through WebLCT
For each part of the units, groups of alarms are defined. These alarms can be independent or interdepend-
ent with each other, according to the real causes that generated them.
Alarms are divided into 4 severity levels according to the effects that an alarm might cause to the regular
operation of the unit detecting it. Levels are prioritised as follows:
• Critical (red): out-of-service, hw failure, urgent alarm
• Major (orange): loss of signal, minimum residual functionality, urgent alarm
• minor (yellow): failure neither urgent, high residual functionality, not urgent alarm
• warning (light blue): indication or wrong configuration, not urgent alarm
• none (green): no alarm or masked alarm.
Critical and Major alarms indicate impossibility of executing a service, hence the faulty units needs to be
serviced. Minor level represents the not urgent alarms which do not prejudice service continuity. Warning
level indicates malfunctions that might be locally removed without having to replace the unit. Alarm sever-
ity can be modified or masked in “Alarm severity configuration” via WebLCT by the operator.
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