Oracle Acme Packet 4500, Hardware Installation And Maintenance Manual

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MAINTENANCE
Acme Packet 4500 Hardware Installation and Maintenance Guide 83
Cleaning the Cooling
Components To clean the fan module:
1. Refer to the instructions detailed in the section Removing and Replacing the Fan
Module in this chapter to remove the fan module from the chassis.
2. Spray compressed air into the fan module to dislodge and blow away any
contaminants and clean out the four fans.
3. Refer to the instruction detailed in the section Removing and Replacing the Fan
Module in this chapter to replace the fan module.
To clean the perforated air inlets:
1. Remove the fan bezel from the chassis.
2. Gently wipe the front fan bezel that contains the perforated air inlets with a
clean, dry cloth. You can alternatively remove the fan bezel from the system and
use compressed air to clean out the perforated air inlets.
Note: Only the removable fan bezel has vent holes that require
cleaning.
Caution To prevent damage to the painted finish, do not use any
solvents or liquids to clean the perforated air inlets on the
front of the chassis.
NIU Removal and Replacement
When possible, remove system power before removing and replacing an NIU.
However, without powering down the Acme Packet 4500, you can exchange an NIU
(for the same type of card) by removing and replacing it. Upon NIU removal, the
Acme Packet 4500 enters an Out-of-Service state. After you reinsert the NIU and
connect to the ACLI, you must reboot the system to return to service. This causes a
soft-reboot rather than a system power cycle.
Caution Make sure you are properly grounded with an ESD strap before
removing the NIU.
NIU Removal To remove an NIU:
1. Unplug all network and management cables from the NIU you plan to remove
from the Acme Packet 4500 chassis.
Note: This will cause a link loss on all connections.