Specifications

3-3
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 3 Maintenance
Air Filter Inspection and Replacement
Step 5 If you washed the filter, allow it to completely air dry for at least eight hours and install a spare filter
(spare filters should be kept in stock) in its place:
Warning Do not put a damp filter back in the ONS 15454.
a. If the air filter is installed in the external filter brackets, slide the air filter all the way to the back of
the brackets to complete the procedure.
b. If the filter is installed beneath the fan-tray assembly, slide the air filter into the recessed
compartment at the bottom of the shelf assembly. Put the front edge of the air filter flush against the
front edge of the recessed compartment.
Step 6 Push the fan tray back into the shelf assembly.
Caution If the fan tray does not slide all the way to the back of the shelf assembly, pull the fan tray out
and readjust the position of the reusable filter until the fan tray fits correctly.
Note On a powered-up ONS 15454, the fans start immediately after the fan-tray assembly is
correctly inserted.
Step 7 Rotate the retractable handles back into their compartments and close the ONS 15454 front door.
3.1.2 Disposable Air Filter
Versions prior to the NEBS 3E version of the ONS 15454 use a disposable air filter. The disposable filter
is made of spun white polyester that is flame retardant. This disposable filter is not designed to be
cleaned. You can order air filter replacements from Cisco (Cisco P/N 47-01-00001) or from Universal
Air Filter, model PE-5 (Universal Air Filter Co., 1624 Sauget Ind. Parkway, Sauget, IL 62206).
Note The disposable air filter is installed beneath the fan-tray assembly, so you must remove the fan-tray
assembly to inspect and replace the disposable air filter.
Procedure: Inspect and Replace the Disposable Air Filter
Step 1 Remove the front door of the shelf assembly.
Step 2 Open the front covers of the fiber management area.
Step 3 Lower the hinged panels in front of the cable management tray.
Step 4 Slide the fan-tray assembly out of the shelf assembly (see Figure 3-2).