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Chapter 3: Maintenance and Component Installation
System Cooling
Three 8-cm chassis cooling fans (located in the center of the chassis) provide cooling airflow
while two 8-cm exhaust fans expel hot air from the chassis. The chassis is also fitted with
an air shroud to concentrate the flow of cooling air over the areas of highest generated heat.
The fans should all be connected to headers on the serverboard. Each power supply module
also has a cooling fan.
Fan Failure
Under normal operation, all three chassis fans, both exhaust fans and the power supply
fans run continuously. The chassis fans and the exhaust fans are hot-swappable and can be
replaced without powering down the system.
Replacing Chassis Cooling Fans
1. Begin by removing the side cover as described in section 3.2.
2. Depress the locking tab on the failed fan: on a chassis fan, push the tab on the side
of the housing inward, on the exhaust fan push down on the colored tab. With the tab
depressed, pull the unit straight out. The wiring for these fans has been designed to
detach automatically.
3. Replace the failed fan with an identical one. Install it in the same position and orientation
as the one you removed; it should click into place when fully inserted. Check that the
fan is working then replace the top/left side chassis panel.
Figure 3-10. Replacing System Fans
