Supermicro 7034A-T, User Manual

Page: 57 / 104

Chapter 6: Advanced Chassis Setup
6-5
6-3 System Fans
A 9-cm fan at the front of the chassis provides cool air intake while a 12-
cm exhaust fan at the rear of the chassis pulls the cool air through the
system and expels the hot air. Both fans feature PWM (Pulse Width Modula-
tion) technology, which enables fans to adjust their speed according to the
heat level sensed in the system. This results in more efficient and quieter
fan operation. Fan speed is controlled by a setting in BIOS (see page 7-19).
Fan Failure
Under normal operation, the chassis, the exhaust and the power supply
fans all run continuously. The system must be powered down before re-
placing either the 9-cm chassis fan or the 12-cm exhaust fan.
Replacing System Fans
1. Identifying and accessing the failed fan
Inspect the back of the chassis to determine if the 12-cm exhaust fan has
failed or the lower front section of the chassis to check if the 9-cm fan has
failed. Power down the system and remove the left chassis cover by first
removing the two screws from the back lip of the cover. Push the cover
toward the rear of the chassis until it stops (after moving about ½ inch).
Then lift the cover out and away from the chassis.
2. Removing the 12-cm fan
Unplug the fan wires from the header on the motherboard. The fan
housing has two long tabs that protrude through the back of the chassis.
Push these two tabs inward and lift the housing to remove it from its
locked position, then lift the housing out of the chassis (see Figure 6-4).
3. Removing the 9-cm fan
Unplug the fan wires from the header on the motherboard. The housing
for the 9-cm fan is attached to the chassis with a single screw. Remove
this screw and lift the housing out of the chassis (see Figure 6-5).
4. Installing a new system fan
Disassemble the housing and replace the failed fan with an identical one
(available from Supermicro). After the new fan has been installed, reas-
semble the fan housing and install it by reversing the removal procedure.
Plug the fan wires back into their header on the motherboard. Finish by
replacing the chassis cover, then restore power to the system. Verify
that the replaced fan is working properly.