Replacing the Chassis' Air Filter


Replacing the Chassis' Air Filter
 
The lower fan draws air into the chassis. It is equipped with a particulate air filter to prevent dust and debris from entering the system. The air filter must be changed periodically to ensure proper ventilation and air flow through the chassis.
Important: It is recommended that you replace the air filter at least every six months. Keep a minimum of one replacement air filter on site for each deployed chassis. This ensures that qualified service personnel can quickly replace the filter when needed. It is also recommended that the filter be replaced during a maintenance window. To order replacement air filters, use part number 600-00-1105.
ESD Caution: During installation, maintenance, and/or removal, wear grounding wrist straps to avoid ESD damage to the components. Failure to do so could result in damage to electrical components and could potentially void your warranty.
Determining When an Air Filter Needs Replacing
If the air filter is replaced at least every six months as part of routine maintenance, there should be no need for out-of-cycle replacement. However, under certain conditions, the air filter may need replacement between maintenance periods.
One possible indication that an air filter needs to be replaced is if the chassis temperature remains high for extended periods of time. This condition causes the dual speed fans to run at high speed. A clogged and dirty air filter could hinder air flow through the chassis and result in higher operating temperatures.
To monitor chassis temperature and fan speed, issue the following command in the CLI’s Execute mode:
show fans
The following is a sample output for this command:
Upper Fan Controller: State=All Running   Speed=Normal Temp=20 (C)
Lower Fan Controller: State=All Running   Speed=Normal Temp=20 (C)
To monitor the temperature of individual cards, enter the following command in the CLI’s Execute mode.
Note that 10 Gigabit Ethernet Line Cards (XGLCs) are full-length line cards that take up both the upper and lower slots. Enter the upper slot number only for each installed XGLC.
show card info slot_#
This command displays operational information, including the temperature for the card installed in chassis slot_#, which can be any integer value between 1 and 48.
The system supports Simple Network Management Protocol (SNMP) traps that are triggered for conditions that may indicate the need to change the air filter:
 
Removing the Old Air Filter
Follow the instructions below to remove the system’s old air filter.
Step 1
Step a
Step b
Step 2
Caution: Do not operate the chassis without the air filter installed for extended periods of time. Doing so will cause dust to build up within the system, possibly hindering air flow and clogging open connector ports.
Step 3
Step 4
Proceed to the Installing the New Air Filter section that follows.
 
Installing the New Air Filter
Follow the instructions below to install the system’s new air filter.
Step 1
Caution: Installing the air filter incorrectly may cause over-temperature conditions within the system.
Step 2
Step 3
Step 4
Step 5
Important: The fan tray cover is keyed and can only be installed in one direction.
Step 6
Step a
Step b
 
 

Cisco Systems Inc.
Tel: 408-526-4000
Fax: 408-527-0883