Chapter 6: Advanced Chassis Setup
6-3
6-3 System
Fans
Three 4-cm heavy duty counter-rotating fans provide the cooling for the 1011M-UR.
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. It is very important that the chassis top cover is
properly installed and making a good seal in order for the cooling air to circulate
properly through the chassis and cool the components. See Figure 6-2.
System Fan Failure
Fan speed is controlled by system temperature via a BIOS setting. If a fan fails,
the remaining fan will ramp up to full speed and the Universal Information LED on
the control panel will blink on and off quickly. Replace any failed fan at your earli-
est 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 two fans has failed. Then power down the system be-
fore replacing a fan. Removing the power cords is also recommended as a safety
precaution.
Replacing
System
Fans
1. Removing a fan
After turning off the power to the system, fi rst remove the chassis cover and unplug
the fan cable from the motherboard. Unscrew the failed blower fan from the chassis
and pull it completely out from the motherboard.
2. Installing a new fan
Replace the failed fan with an identical 4-cm, 12 volt fan (available from Supermicro:
p/n FAN-0086L). Push the new fan into the vacant space in the housing while mak-
ing 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.
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