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TOPS VSN Log and alarm messages
10. Alarm Subsystem - 8722
0001/0001 Message: Alarm Interface Unit has RECEIVED an external alarm.
External ALIU input is: <string>.

Explanation: The ALIU has sensed remote activation of an alarm condition.

The string stating the error is one of the following:
FAN 1 FAILURE
POWER CONVERTER 1 FAILURE
POWER CONVERTER 2 FAILURE
FUSE FAILURE
FAN 2 FAILURE
POWER CONVERTER 3 FAILURE
POWER CONVERTER 4 FAILURE
USER 1 INPUT
USER 2 INPUT
USER 3 INPUT
Action: The system should be serviced according to the troubleshooting
procedures in NTP 450-1011-501. System troubleshooting should only be
performed by qualified service personnel (that is, a system administrator or
maintenance technician).
0001/0002 Message: Alarm Interface Unit has RECOVERED an external alarm.
External ALIU input is: <string>.

Explanation: The ALIU has sensed the clearing of the externally generated

alarm. The string stating the error is one of the following:
FAN 1
POWER CONVERTER 1
POWER CONVERTER 2
FUSE
FAN 2
POWER CONVERTER 3
POWER CONVERTER 4
USER 1 INPUT
USER 2 INPUT
USER 3 INPUT
Action: No action required by the user.
0005/0001 Message: The alarm subsystem has lost communication with the APTIO
port. Please check the status of the APTIO port <port-name>.

Explanation: The link between the alarm subsystem and the "alarm box" has

been disconnected. The alarm box is a separate visual indicator of alarms.