Cisco ONS 15454 Troubleshooting Manual page 472

2.9.6 Air Filter and Fan Procedures
Step 6 In the Admin State column, determine whether any port row shows an admin state other than IS, for
example, OOS,MT.
If a row shows an admin state other than IS, click in the column cell to display the drop-down list and
Step 7
select IS.
Note
Step 8 Click Apply.
2.9.6 Air Filter and Fan Procedures
This section gives instructions for cleaning or replacing the air filter and reseating or replacing the fan
tray assembly.
Inspect, Clean, and Replace the Reusable Air Filter
To complete this task, you need a vacuum cleaner or detergent and water faucet, a spare filter, and a
pinned hex key.
Do not reach into a vacant slot or chassis while you install or remove a module or a fan. Exposed
Warning
circuitry could constitute an energy hazard. Statement 206
Although the filter works if it is installed with either side facing up, Cisco recommends that you install
it with the metal bracing facing up to preserve the surface of the filter.
Always use the supplied electrostatic discharge wristband when working with a powered ONS 15454.
Caution
Plug the wristband cable into the ESD jack located on the lower-right edge of the shelf assembly.
Step 1 Verify that you are replacing a reusable air filter. The reusable filter is made of a gray, open-cell,
polyurethane foam that is specially coated to provide fire and fungi resistance. NEBS 3E and later
versions of the ONS 15454 use a reusable air filter.
If the air filter is installed in the external filter brackets, slide the filter out of the brackets while being
Step 2
careful not to dislodge any dust that could have collected on the filter. If the filter is installed beneath
the fan tray and not in the external filter brackets, open and remove the front door assembly by
completing the following steps:
a.
b.
Cisco ONS 15454 Troubleshooting Guide, R8.5
2-278
If a port in the IS admin state does not receive a signal, the LOS alarm is raised and the port
service state transitions to OOS-AU,FLT.
Open the front door of the shelf assembly by completing the following substeps.(If it is already open
or if the shelf assembly does not have a front door, continue with
Open the front door lock.
•
Press the door button to release the latch.
•
Swing the door open.
•
Remove the front door by completing the following substeps (optional):
Chapter 2 Alarm Troubleshooting
Step 3.)
November 2009