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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 2 Alarm Troubleshooting
2.9.6 Air Filter and Fan Procedures
• Detach the ground strap from either the door or the chassis by removing one of the Kepnuts.
• Place the Kepnut back on the stud after the ground strap is removed to avoid misplacement.
• Secure the dangling end of the ground strap to the door or chassis with tape.
Step 3 Push the outer side of the handles on the fan-tray assembly to expose the handles.
Step 4 Pull the handles and slide the fan-tray assembly one inch (25.4 mm) out of the shelf assembly and wait
until the fans stop.
Step 5 When the fans have stopped, pull the fan-tray assembly completely out of the shelf assembly.
Step 6 Gently remove the air filter from the shelf assembly. Be careful not to dislodge any dust that could have
collected on the filter.
Step 7 Visually inspect the air filter material for dirt and dust.
Step 8 If the reusable air filter has a concentration of dirt and dust, either vacuum or wash the air filter. Prior to
washing the air filter, replace the dirty air filter with a clean air filter and also reinsert the fan-tray
assembly. Wash the dirty air filter under a faucet with a light detergent.
Spare ONS 15454 filters should be kept in stock for this purpose.
Note Cleaning should take place outside the operating environment to avoid releasing dirt and dust
near the equipment.
Step 9 If you washed the filter, allow it to completely air dry for at least eight hours.
Caution Do not put a damp filter back in the ONS 15454.
Step 10 If the air filter should be installed in the external filter brackets, slide the air filter all the way to the back
of the brackets to complete the procedure.
Step 11 If the filter should be installed beneath the fan-tray assembly, remove the fan-tray assembly and 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. 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 12 To verify that the tray is plugged into the backplane, ensure that the LCD on the front of the fan-tray
assembly is activated and displays node information.
Step 13 Rotate the retractable handles back into their compartments.
Step 14 Replace the door and reattach the ground strap.
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