All installed fan modules must blow air in the same direction and must match the
airflow direction of the installed power supplies.
Note
The operating-system software cannot display the airflow direction.
Remove the four PSUs and four
fan modules by removing the two captive retaining screws and sliding all
components out of the switch:
Remove PSUs and fan
modules
Use a Phillips #1 screwdriver to loosen the chassis screw:
Chassis switch screw
front-to-back airflow
Use a flathead screwdriver to change the chassis switch. The following figure
is an example of changing front-to-back airflow to back-to-front airflow:
Front-to-back airflow
chassis position
Back-to-front airflow
chassis position
Use a Phillips #1 screwdriver to tighten the chassis screw:
Chassis screw
back-to-front position
Carefully slide the PSUs and fan modules back into the switch:
Remove PSUs and fan
modules
Tighten the two captive retaining screws to secure the components.
