4-3
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 4 Maintenance
Air Filter Inspection
Figure 4-1 Reusable fan tray filter in external filter brackets
Procedure: Inspect and Clean Reusable Air Filter
Step 1 Slide the filter out of the external filter brackets. Be careful not to dislodge any dust that could have
collected on the filter.
Step 2 Visually inspect the filter for dirt and dust.
Step 3 If the air filter has a concentration of dirt and dust, vacuum the filter or wash the filter under a faucet
with a light detergent.
Note If possible, clean the filter outside of the operating environment to avoid releasing dirt and
dust near the equipment.
Step 4 If you washed the filter, allow it to air-dry at least 8 hours (or use spare filter).
Caution Do not put a damp filter back in the ONS 15454 SDH.
Purpose Use this procedure to clean the reusable air filter.
Tools/Equipment Vacuum cleaner
Prerequisite procedures —
Required/As Needed Required
On Site/Remote On Site
61235
Fan tray filter
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