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Removing and Replacing the Fan Tray
The dust filter must be removed for cleaning or for a replacement.
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.
If reused, this filter media may be cleaned with slightly compressed air, vacuumed, and/or rinsed with clean
water. If a degreaser is required, use only a mild detergent, such as, dish washing liquid.
Caution
Avoid using harsh solvents or cleaning agents.
If filters are cleaned with water, the filters should be completely dry before reinstalling. Even though this type
of filter may be cleaned, replacement is recommended every two to three years to ensure media durability
and eliminate residual dust build-up and subsequent air flow resistance.
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 the FAN tray is removed and not replaced within the stipulated time then the system will automatically
Note
power off. If the system is powered off, then the DC input should be turned off for at least 30 seconds for
all the PSU in the system simultaneously, and then turned on for the router to power on.
Do not introduce body parts or objects in the fan tray slot when installing or removing the fan tray module.
Note
Exposed circuitry is an energy hazard.
The router can stay active for up to 60 seconds if the temperature is below the ambient limit. However,
Caution
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.
Follow these steps to remove and replace the fan tray on the Cisco NCS 4216:
Cisco NCS 4216 Hardware Installation Guide
20
Installing the Cisco NCS 4216
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