Sun Microsystems Enterprise 250 Owner's Manual page 279

Environmental Failures
The environmental monitoring subsystem monitors the temperature of the system as
well as the operation of the fans and power supplies. For more information on the
environmental monitoring subsystem, see "Environmental Monitoring and Control"
on page 42.
In response to an environmental error condition, the monitoring subsystem
generates error messages that are displayed on the system console and logged in the
/var/adm/messages file. These error messages are described in the table below.
Message
TEMPERATURE WARNING:
X degrees celsius at
location Y.
TEMPERATURE CRITICAL:
X degrees celsius at
location Y .
Type Description
Warning Indicates that the temperature measured at
location Y has exceeded the warning
threshold and if it continues to overheat the
system will shutdown.
If the value of location Y is a sensor on a
CPU, (CP0 or CP1) the temperature
(identified by the value X) has exceeded 60
degrees C.
If the value of location Y is a sensor on the
PDB (power distribution board), SCSI
backplane, MB0 or MB1 (main logic board),
the ambient temperature (identified by the
value X) has exceeded 53 degrees C.
Warning Indicates that the temperature measured at
location Y has exceeded a critical threshold.
After this warning message, the system
automatically shuts down.
If the value of location Y is a sensor on a
CPU, (CP0 or CP1) the temperature
(identified by the value X) has exceeded 65
degrees C.
If the value of location Y is a sensor on the
PDB (power distribution board), SCSI
backplane, MB0 or MB1 (main logic board),
the ambient temperature (identified by the
value X) has exceeded 58 degrees C.
Chapter 11 Diagnostics and Troubleshooting 261