A replaceable air filter is positioned above the lower fan tray. How often the air filter should be replaced
depends on the facility environment. In a dirty environment, or when you start getting frequent temperature
alarms, you should always check the intake grills for debris, and then check the air filter to see if it needs
replacement.
Before removing the air filter for replacement, you should have a spare filter on hand; then, when you remove
the dirty filter, install the spare filter in the chassis.
Figure 8: Airflow Through LCC
Power shelves (two installed)
6
Front (PLIM) side of chassis
1
Air exhaust
7
Air intake
2
Upper card cage
8
Lower fan tray
3
Lower card cage
9
Air filter
4
Cisco CRS Routers 16-Slot Line Card Chassis Installation Guide
12
Overview
Chassis Cooling System