15-2
Cisco ONS 15454 Procedure Guide, R5.0
December 2004
Chapter 15 Maintain the Node
NTP-A107 Inspect, Clean, and Replace the Air Filter
19. NTP-A266 Edit Network Element Defaults, page 15-35—Complete as needed to edit the
factory-configured (default) network element settings for the Cisco ONS 15454.
20. NTP-A165 Import Network Element Defaults, page 15-36—Complete as needed to import the
factory-configured (default) network element settings for the Cisco ONS 15454.
21. NTP-A166 Export Network Element Defaults, page 15-38—Complete as needed to export the
factory-configured (default) network element settings for the Cisco ONS 15454.
NTP-A107 Inspect, Clean, and Replace the Air Filter
Warning
Do not reach into a vacant slot or chassis while you install or remove a module or a fan. Exposed
circuitry could constitute an energy hazard.
Statement 206
Caution Cisco recommends that you inspect the air filter monthly, and clean the filter every three to six months.
Replace the air filter every two to three years. Avoid cleaning the air filter with harsh cleaning agents or
solvents.
Note Although the filter can work 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.
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.
Step 2 If the air filter is installed in the external filter brackets, slide the filter out of the brackets while being
careful not to dislodge any dust that might have collected on the filter and proceed to Step 9. Figure 15-1
illustrates a reusable fan-tray air filter in an external filter bracket.
Step 3 If the filter is installed below the fan tray and not in the external filter brackets, open the front door of
the shelf assembly using the following substeps. If the front door is already open, proceed to Step 4.
a. Open the front door lock.
The ONS 15454 comes with a pinned hex key for locking and unlocking the front door. Turn the key
counterclockwise to unlock the door and clockwise to lock it.
b. Press the door button to release the latch.
c. Swing the door open.
Purpose This procedure ensures that the air filter is free from dirt and dust, which
allows optimum air flow and prevents dirt and dust from entering the
shelf.
Tools/Equipment Vacuum or detergent and water faucet, spare filter, pinned hex key tool
Prerequisite Procedures None
Required/As Needed As needed
Onsite/Remote Onsite
Security Level None
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