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6-4
A+ Workstation 4021A-T2 User's Manual
6-3 System Fans
Four 8-cm chassis cooling fans (located in the center of the chassis) provide
cooling airfl ow while two 8-cm exhaust fans expel hot air from the chassis. The
chassis is also fi tted with an air shroud to concentrate the fl ow of cooling air over
the areas where the most heat is generated. The fans should all be connected to
headers on the serverboard (see Chapter 5). The power supply module also has
a cooling fan.
Fan Failure
Under normal operation, all four chassis fans, the fans on the CPU heatsinks and
the power supply fan will all run continuously. The four chassis fans are hot-swap-
pable and can be replaced without powering down the system.
Replacing Chassis Cooling Fans
Begin by removing the top/left chassis cover (see Chapter 2 for details on
removing the cover) to visually inspect the system to determine which fan has
failed.
Depress the locking tab on the side of the chassis fan and pull the unit
straight out by the handle (see arrows in Figure 6-3). The fan wiring for these
fans has been designed to detach automatically.
Replace the failed fan with an identical one (p/n FAN-0074). Install it in (and
then reassemble) the fan housing, then plug the housing back into its slot; it
should click into place when fully inserted. Check that the fan is working then
replace the top/left side chassis panel.
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