User`s manual

Chapter 6: Advanced Chassis Setup
6-3
6-3 System Fans
Six 4-cm fans provide the cooling for the 1040C-T/1040C-8. 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 vibra-
tion 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.
It is very important that the chassis top cover is properly installed for the airfl ow to
circulate properly through the chassis to effectively 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 while the system is still run-
ning to determine which of the fan units has failed. Then power down the system
before replacing a fan. Removing the power cord from the power supply is also
recommended as a safety precaution.
Replacing System Fans
1. Removing a fan
With the system powered down, fi rst remove the chassis cover (refer to page 6-7)
and unplug the failed fan's cable from the serverboard. Grasp the fan unit and lift
it out of the chassis (fans units may be removed individually, see Figure 6-2).
2. Installing a new fan
Replace the failed fan with an identical 4-cm, 12 volt fan (available from the manu-
facturer: p/n FAN-0083). Push the new fan into the vacant space 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. The feet on the fan should fi t snugly into the holes
provided in the fan mounting piece that sits below all six fans. Reconnect the fan
wires to the same fan header you removed them from, then 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.