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System Fan Failure
Fan speed is controlled by system temperature via a BIOS setting. If a fan fails, the
remaining fans will ramp up to full speed and the Universal Information LED on the
control panel will blink quickly. 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 while the system is still running to determine which of the fans has
failed. Then power down the system before replacing a fan. Removing the power cords is
also recommended as a safety precaution.
Replacing System Fans
Removing a fan
After turning off the power to the system, first remove the chassis cover and unplug the
fan cable from the server board. Unscrew the failed blower fan from the chassis and pull
it completely out from the server board.
Installing a new fan
Replace the failed fan with an identical 4-cm, 12 volt fan (available from American
Megatrends Inc.:p/n FAN-0086L). Push the new fan into the vacant space in the housing
while making sure the arrows on the top of the fan (indicating air direction) point in the
same direction as the arrows on the other fans. Reposition the fan housing back over the
two mounting posts in the chassis, then reconnect the fan wires to the same chassis fan
headers you removed them 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.
Figure 6-2. System Cooling Fans
Chapter Six : Advanced Chassis Setup
77
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