Allied Telesis AT-SBx81CFC960 - Manual (Page 254)

Chapter 12: Replacing Modules
254 Section II: Installing the Chassis
Figure 167. Withdrawing the AT-SBxFAN12 Fan Module 51 mm (2 In.)
from the Chassis
5. Wait ten seconds for the fans to stop.
Warning
The fan module has hazardous moving parts. Keep fingers away
from moving fan blades.
6. After the fans have stopped, slide the module from the chassis. Refer
to Figure 168 on page 255.
Caution
The fan module is heavy. Be sure to use both hands to hold it as you
remove it from the chassis.
50 mm
(2 in.)