Version 7.0 83 Mediant 3000
Hardware Installation Manual 6. Hardware Maintenance and Repair
6.6 Replacing the Air Filter
The hot-swappable Fan Tray module contains eight fans and an air filter. The NEBS
compliant air filter must be replaced every 90 days. The air filter must also be checked
weekly to ensure that it is not filled with dust, in which case it must be replaced as soon as
possible.
Warning:
The chassis cannot operate without a Fan Tray module for more than 30
seconds; otherwise, irreversible damage may be caused to the chassis components due
to overheating. Therefore, the replacement procedure (extraction of the air filter and the
Fan Tray module and then the insertion of the replacement air filter and the Fan Tray
module) must be done within 30 seconds. To ensure that the procedure is performed
within this time, it is recommended to have the replacement air filter ready for insertion
before removing the air filter and the Fan Tray module. If, for any reason, there is a delay
in inserting the replacement air filter, re-insert the Fan Tray module without the air filter
until an air filter is ready.
To replace the air filter:
1. Remove the air filter:
a. Remove the Fan Tray module from the chassis (see Section 6.5 on page 82).
b. Hold the inside of the steel frame of the air filter and pull it out of the chassis slot.
It should slide out relatively easily; if it doesn't, use slightly more force.
c. Re-insert the Fan Tray module (see Section 6.5 on page 82).
The figure below shows the air filter partially removed from the chassis:
Figure 6-3: Removing the Air Filter
Item # Description
1
Directional Arrow
2
Air Filter
3
Fan Tray Module
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