User's Manual

Using the CMC Web Interface 103
The Fans Status page provides the status and speed measurements in
revolutions per minute, or RPMs, of the fans in the chassis. There can be one
or more fans.
The CMC, which controls fan speeds, automatically increases or decreases
fan speeds based on system wide events. T
he CMC generates an alert and
increases the fan speeds
when the following events occur:
• The CMC ambient temperature threshold is exceeded.
• A fan fails.
• A fan is removed from the chassis.
To view the health status of the fan units:
1
Log in to the CMC Web interface.
2 Select Fans in the system tree. The Fans Status page displays.
Table 5-6 provides descriptions of the information provided on the Fans
Status page.
Table 5-6. Fans Health Status Information
Item Description
Name Displays the fan name in the format FAN-n, where n is the fan
number.
Present Indicates whether the fan unit is present (Yes or No).
Health OK Indicates that the fan unit is present and
communicating with the CMC. In the event of
a communication failure between the CMC
and the fan unit, the CMC cannot obtain or
display health status for the fan unit.
Severe Indicates at least one Failure alert has been
issued. Severe status represents a system
failure on the fan unit, and corrective action
must be taken immediately to prevent
overheating and system shutdown.
Unknown Displayed when the chassis is first powered on.
In the event of a communication failure
between the CMC and the fan unit, the CMC
cannot obtain or display health status for the
fan unit.