Cisco Systems Cisco 12404 Manual De Usuario

If the air temperature inside the RP and line card cage rises the system 
environmental monitor shuts down all internal power to prevent equipment 
damage from excessive heat.

If the system detects that one of the fans within the fan tray assembly has failed, 
it displays a warning message on the console screen. If multiple fans fail, the 
system will shut down to prevent equipment damage. 

A handle on the fan tray assembly provides a grip point for removing and 
replacing the fan tray.

The Cisco 12404 router is equipped with one serviceable air filter. As you face the 
rear of the chassis, the air filter is housed on the left side of the chassis in a narrow 
vertical slot. 

Do not run the Cisco 12404 router without the air filter installed. You should 
inspect and clean the air filter once a month (more often in dusty environments). 
Procedures for vacuuming and replacing the air filter are contained in the section 
“

” in Chapter 5. A copy of the air 

filter replacement instructions is shipped with the air filter when ordered as an 
FRU, Cisco 12404 Internet Router Air Filter Replacement Instructions, 
document Part No. 78-13621-01. 

 shows the location of the air filter.

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