Dust Filter Maintenance
A periodic health check of the filter, every 3 months based on the level of dust in the environment helps in
avoiding over clogging of the filters and provide better life. The product's filter may be used as a single use
or reused depending upon the local deployment needs. If reuse of the filter is prohibited, it may be replaced
every six months with PID (A907-FAN-F=) or equivalent.
Removing and Replacing the Fan Tray
The fan tray supports online insertion and removal (OIR). There is no need to power down the Cisco NCS
4216 to remove or replace the fan tray. However, the router will shut down if the fan tray is removed from
the chassis for more than 90 seconds at 25º C due to thermal overload condition. Once the thermal overload
condition is absent, the system attempts to power up automatically, if the Fan tray is re-inserted and the system
temperature is within limits. Approximately at 25º C the system powers back in 2 minutes.
If a fan tray is removed and not replaced within the stipulated time the system will automatically power-off.
If the system is powered with PSUs other than 900W DC or 1200W AC and if the system is powered off,
then the system should be completely powered off for 30 seconds with all the PSU in the system simultaneously,
and then turned on for the system to power on.
Note
Do not introduce body parts or objects in the fan tray slot when installing or removing the fan tray module.
Exposed circuitry is an energy hazard.
Note
The router can stay active for up to 60 seconds if the temperature is below the ambient limit. However, in the
event of an overtemperature alarm, the router can shut down in less than 60 seconds. In the event of a critical
temperature alarm, the router shuts down immediately.
Caution
To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after the fan tray
has been removed or replaced.
Caution
Follow these steps to remove and replace the fan tray on the Cisco NCS 4216:
Procedure
Step 1
Using a No. 2 Phillips screwdriver or your fingers, loosen the captive installation screw that secures the fan
tray to the chassis. The following figure shows the front of the fan tray, including the captive installation
screws.
Installing the Cisco NCS 4216
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Installing the Cisco NCS 4216
Dust Filter Maintenance
