SUPER MICRO Computer AS1011M-T2 - Manual (Page 65)

Chapter 6: Advanced Chassis Setup
6-3
6-3 System Fans
Two 4-cm fans provide the cooling for the 1011M-T2. Each fan unit is actually made
up of two fans joined back-to-back, which rotate in opposite directions. This counter-
rotating action generates exceptional airfl ow and works to dampen vibration levels.
These fans can adjust their speed according to the heat level sensed in the system,
which results in more effi cient and quieter fan operation. Fan speed is controlled by a
setting in BIOS (see Chapter 7). Each fan in a set has its own separate tachometer.
An air shroud is also included with the system to optimize airfl ow.
Note: It is very important that the chassis top cover is properly installed for the
airfl ow to circulate properly through the chassis and cool the components.
System Fan Failure
If a fan fails, the remaining fans will ramp up to full speed and the overheat/fan
fail LED on the control panel will blink on and off. Replace any failed fan at your
earliest convenience with the same type and model (the system can continue to
run with a failed fan). Remove the top chassis cover (refer to page 6-7) while the
system is still running to determine which fan unit has failed, then power down
the system to replace it. Removing the power cord(s) is also recommended as a
safety precaution.
Replacing System Fans
1. Removing a fan
With the system powered down, fi rst unplug the failed fan cable from the mother-
board. Grasp the failed fan unit and lift it out of the chassis.
2. Installing a new fan
Replace the failed fan with an identical 4-cm, 12 volt fan (p/n FAN-0087). At the
bottom of each fan unit there are four small rubber pieces that help position the
fan into place in the chassis. Remove these from the failed fan and attach them
to the new fan (new fans do not include this piece). Then place the new fan in the
housing with the fan wiring toward the motherboard. Reconnect the fan wiring to
the same fan header you removed it from. Power up the system and check that
the fan is working properly and that the LED on the control panel has turned off.
Finish by replacing the chassis cover.