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Chapter 4 - Managing and Monitoring
When this option is enabled, the software will control the RPM of the cooling
fans based on enclosure temperature parameters and its installed component.
For example, if any one or a combination of the following occurs, the cooling fan
RPMs will be set to the maximum software controlled RPM: a disk drive is
removed from any of the drive slots 4 through 9, a power supply is removed, one
of the cooling fans in the cooling fan module fails, a temperature sensor fails, or
a SES processor fails.
Manual Override
A manual override of the fan speed control is available for special circumstance
environments. Referring to the illustration on the following page, two jumpers are
provided on the fan module printed circuit board to override the firmware
control of the fan speeds.
This hardware setting provides full voltage to the fans for maximum operational
speed, which is greater than the maximum speed set by the automatic software
control. This configuration is normally used when fan speed noises are not an
issue, and the ambient operating temperature is at or above 30°C (86°F), thus
ensuring that maximum available cooling is being provided.
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Manual Override
Cooling Fan Module
Fan Speed Override Control
Jumpers JP1 (Fan 0)
and JP2 (Fan 1)
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