• Press the door button to release the latch.
• Swing the door open.
b) Remove the front door by completing the following substeps (optional):
• 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 unclean air filter with a clean air filter and also reinsert the fan-tray assembly. Wash the unclean
air filter under a faucet with a light detergent.
Spare system filters should be kept in stock for this purpose.
Cleaning should take place outside the operating environment to avoid releasing dirt and dust near the
equipment.
Note
Step 9 If you washed the filter, allow it to completely air dry for at least eight hours.
Do not put a damp filter back in the NCS system.
Caution
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.
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.
Caution
On a powered-up NCS system, the fans start immediately after the fan-tray assembly is correctly inserted.
Note
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.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
459
Alarm Troubleshooting
Inspect, Clean, and Replace the Reusable Air Filter
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