Cisco 12016, Руководство по установке и настройке, Страница: 70 / 416

Chapter 1 Product Overview
Blower Module
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Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
Blower Module
The router has two blower modules to distribute air within the chassis. One blower
module is located above the upper card cage; the second blower module is located
below the lower card cage (see
Figure 1-1 ).
Each blower module contains three variable speed fans and a controller card. The
two front cover LEDs provide a visual indication of blower module status
(
Figure 1-22 ):
Figure 1-22 Blower Module
•
OK (green)—All three fans are operating normally.
•
FAIL (red)—The system has detected a fan failure or other fault in the blower
module. The fault can be caused by any of the following:
– One or more fans are not operating
–
One or more fans are running below speed
–
A controller card fault
The blower modules maintain acceptable operating temperatures for the internal
components by drawing cool air through a replaceable air filter into the switch
fabric card cage and then through the upper and lower card cages.
Figure 1-23
illustrates the air flow path through the chassis.
129308
LEDs