Supermicro 8052-6, User Manual

Page: 61 / 110

Chapter 6: Advanced Chassis Setup
6-5
6-3 System Cooling Fans
Four redundant fans (two in each of four fan housings for a total of
eight) are located in the serverboard side of the chassis to provide the
air intake for cooling the system (see Figure 6-4).
System Cooling Fan Failure
Under normal operation, all eight fans run at 80% of their maximum speed,
which supplies sufficient airflow while prolonging fan life. If any fan fails,
the rest will automatically increase their RPM to the full 100% to compen-
sate. An audible alarm and an LED on the front control panel will notify
you of any fan failure. Disable the alarm with the alarm button located by
the control panel. The system cooling fans are hot-swap components,
which allows you to replace them without powering down the system.
Replacing System Cooling Fans
1. Identifying the failed fan:
To identify and replace a failed fan, you must first remove the left side
panel of the chassis. Look at the back of the circuit board that the fans
plug into. The red LED that is illuminated indicates which fan has failed.
As each fan housing contains two fans, examine it closely to verify which of
the two has failed.
2. Removing a hot-plug fan housing:
Unplug the fan cable corresponding to the failed fan and remove the fan
housing from the chassis by depressing its locking tab and pulling the unit
straight out. The fan housings come apart in the middle to allow you
access to each set of redundant fans.
3. Installing a new system fan:
Replace the failed fan with an identical 9-cm, 12 volt fan (available from
Supermicro). After the new fan has been installed, reassemble the fan
housing and plug the housing back into its slot. You should hear it click
into place when fully inserted. Then plug the fan cable back into the
header on the circuit board you removed it from. You should then wind the
excess cable around the tabs on the fan housing to keep it out of the way.
Check that the fan is working properly and that the LEDs on the front
control panel circuit board (Figure 6-3) and the front control panel have
turned off. Finish by replacing the left side chassis panel.