System Fans; System Fan Failure; Replacing System Cooling Fans - Supero Dual Processor AS 1020C-3 User Manual

Chapter 6: Advanced Chassis Setup
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System Fans

Four high-performance, counter-rotating 4-cm fans provide all the cooling needed
for the 1020C-3. Each fan is actually made up of two fans joined back-to-back that
rotate in opposite directions. This counter-rotating action generates exceptional
airfl ow airfl ow while dampening 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 BIOS setting (see Chapter 7).
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

If a fan fails, the remaining fans will ramp up to full speed and the overheat/fan
fail LED on the control panel will turn on. 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 (see instructions on p. 2-8) while the
system is still running to determine which of the four fan units has failed. Then
power down the system before replacing a fan. Removing the power cord(s) is
also recommended as a safety precaution.

Replacing System Cooling Fans

1. Removing a fan
After turning off the power to the system, fi rst remove the chassis cover and unplug
all the fan cables from the serverboard. Grasp the rectangular housing that holds
the fan units and lift it out of the chassis (see Figure 6-2). Push the failed fan unit
out through the bottom of the fan housing.
2. Installing a new fan
Replace the failed fan with an identical 4-cm, 12 VDC fan (p/n FAN-0083). Push
the new fan into the vacant space in the housing while making sure the arrows on
the top of the fan (indicating direction of airfl ow) point in the same direction as the
arrows on the other fans. Reposition the fan housing on the mounting posts in the
chassis, then reconnnect the fan wires to the same 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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