Cisco NCS 2000 series Troubleshooting Manual page 504

Inspect, Clean, and Replace the Reusable Air Filter
Caution
Always use the supplied electrostatic discharge wristband when working with a powered ONS system. Plug
the wristband cable into the ESD jack located on the lower-right edge of the shelf assembly.
SUMMARY STEPS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12. To verify that the tray is plugged into the backplane, ensure that the LCD on the front of the fan-tray
13. Rotate the retractable handles back into their compartments.
14. Replace the door and reattach the ground strap.
DETAILED STEPS
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 NCS system 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 could have collected on the filter. If the filter is installed beneath the fan tray and not in the
external filter brackets, open and remove the front door assembly by completing the following steps:
a) Open the front door of the shelf assembly by completing the following substeps.(If it is already open or if the shelf
assembly does not have a front door, continue with
• Open the front door lock.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
458
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 NCS system use a reusable air filter.
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 could have collected on the filter. If the filter is installed beneath
the fan tray and not in the external filter brackets, open and remove the front door assembly by completing
the following steps:
Push the outer side of the handles on the fan-tray assembly to expose the handles.
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.
When the fans have stopped, pull the fan-tray assembly completely out of the shelf assembly.
Gently remove the air filter from the shelf assembly. Be careful not to dislodge any dust that could have
collected on the filter.
Visually inspect the air filter material for dirt and dust.
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.
If you washed the filter, allow it to completely air dry for at least eight hours.
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.
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.
assembly is activated and displays node information.
Step 3, on page 459.)
Alarm Troubleshooting