Chapter 4 Troubleshooting the Installation
Troubleshooting the Processor Subsystem
Monitoring Critical, Major, and Minor Alarm Status
The alarms can warn of an overtemperature condition:
•On a component in the card cage
•A fan failure in a blower module
•An overcurrent condition in a power supply
•An
The alarm LEDs are controlled by MBus software, which sets the threshold levels for triggering the different stages of alarms.
The RP continuously polls the system for temperature, voltage, current, and fan speed values. If a threshold value is exceeded, the RP sets the appropriate alarm severity level on the alarm card which lights the corresponding LED, and energizes the appropriate alarm display relays to activate any external audible or visual alarms wired to the alarm display. The RP also logs a message about the threshold violation on the system console.
Note If one or more of the alarm LEDs is on, check the system console for messages describing the alarm.
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