Procedure
Step 1
Set the power switch on each power tray to the off (0) position.
Step 2
Power off all circuit breakers for the source power lines connected to the power trays.
Step 3
Verify that the Pwr OK indicator on each power module is off.
Step 4
Verify that the OK indicator on the fan tray is off.
Replacing the Chassis Air Filter
The Cisco ASR 9000 Series Routers are equipped with user-replaceable air filters that help prevent dust from
being drawn into the router. One time per month (or more often in dusty environments), examine the air filters
for damage and cleanliness.
In the Cisco ASR 9006 Router, Cisco ASR 9010 Router, Cisco ASR 9904 Router, Cisco ASR 9906 Router,
and Cisco ASR 9910 Router, the chassis air filter is not serviceable. We recommend that you replace the filter
at regular maintenance intervals. The interval may vary between 3 and 12 months depending on the environment.
Note
In the Cisco ASR 9922 Router and Cisco ASR 9912 Router, the three air filters (left, center, and right) contain
foam media which filters the air going into the chassis. The three air filters can be removed from the chassis
so that the foam media (Cisco PIDs 9922-CEN-FLTRMED= and 9922-LR-FLTRMED=) can be replaced on
a regular maintenance interval. The interval may vary between 3 and 12 months depending on the environment.
Note
Damage to the air filter can restrict the airflow, cause overheating in the router, and degrade electromagnetic
interference (EMI) compliance. Be careful when cleaning and replacing the filter.
Caution
This table describes the air filter locations for the Cisco ASR 9000 Series Routers.
Table 16: Air Filter Locations for the Cisco ASR 9000 Series Routers
Air Filter Location
Router
Located underneath the fan trays.
Cisco ASR 9010 Router
Located along the right side of the chassis and is accessible from the rear.
Cisco ASR 9006 Router
Single air filter located along the right side of the chassis and is accessible from
the rear.
Cisco ASR 9904 Router
Located underneath the card cage.
Cisco ASR 9910 Router
Located underneath the card cage.
Cisco ASR 9906 Router
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
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Replacing Cisco ASR 9000 Series Router Components
Replacing the Chassis Air Filter