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Cooling Fans
The TDZ 2000 GL2/ExtremeZ GL2 has two cooling fans. One is inside the power supply;
the other is mounted in the chassis. Both fans are 12 VDC. The fans pressurize the chassis
and force warm air out from the vents. Hardware controls the dynamic speed of each four-
wire fan.
See Chapter 5, “System Board,” for connector locations and fan cable pinouts. See also
Chapter 2, “Servicing the System,” for details on replacing the chassis fans.
The table below summarizes fan information.
Fan
Airflow Devices Cooled
Rear chassis Back-to-front Processors, drives
Power supply Back-to-front Power supply
The chassis fan is field replaceable.
The power supply fan is not field replaceable. If the fan requires replacement, you must
replace the power supply.
Arrows on each fan indicate airflow direction and rotation, as in the following illustration.
Airflow
Rotation
Side view of fan
Ensure that you install the chassis fan with the airflow direction arrow pointing toward the
inside of the chassis.
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