NEC Express5800/S110R-1 Guía de usuario Pagina 61

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Chapter 6: Advanced Chassis Setup
6-3
6-3 System Fans
Three 4-cm heavy duty counter-rotating fans provide the cooling for the Series3800/
S110R-1 (5015M-UR/5015M-U/5015M-NTR/5015M-NT). 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 air ow and works to dampen vibra-
tion 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 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 conve-
nience 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
1. Removing a fan
After turning off the power to the system, 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 serverboard.
2. Installing a new fan
Replace the failed fan with an identical 4-cm, 12 volt fan (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.
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