Router Installation Guide

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Cisco XR 12416 Router Installation Guide
OL-13833-01
Chapter 1 Product Overview
Blower Module
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 1-15):
Figure 1-15 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 1-16
illustrates the air flow path through the chassis.
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LEDs