Installation guide

5-13
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Chapter 5 Replacing Parts on the IGX
Replacing a Fan Assembly in IGX 8420 or IGX 8430 Nodes
To replace the cooling unit assembly:
Step 1 Have the replacement fan tray and tools ready and located near the front of the node.
Step 2 For the bottom fan tray, remove the air intake grille at the front of the system by turning the internal
screw at the top center of the grille a quarter turn, tilting the grille forward, and lifting it out. (Fan tray 2
at the upper end of an IGX 8430 node does not have an air intake grille.)
Step 3 Examine the front and back of the fan tray to be familiar with the setup. Note the power connectors
attached to the fan tray. The connectors at the fan tray itself are to be disconnected rather than the
D connector at the PE-BC. Also note that the captive screws that hold the fan tray in place are at the front
of the bottom fan tray (fan tray 1) and at the back of the booster fan tray (fan tray 2) in an IGX 8430 node.
Step 4 Loosen the captive screws.
Step 5 At the back of the IGX node, remove the clamp that secures the power cable for the fans to the chassis.
Step 6 Use a small screwdriver or fingertip in this step. For each of the fan power connectors, press in the small
plastic latch that locks the connector halves together. With the other hand, grip the part of the connector
that is attached to the fan tray and separate the cord from the fan tray. The fan tray now has no power.
Step 7 Push a finger or thumb through the square holes in the chassis to ease the fan tray towards the front of
the system. Go to the front of the system.
Step 8 Remove the cooling unit and slide in the replacement unit.
Step 9 Plug the power connectors into the fan tray. Make sure that plug P1 connects to connector P1, and plug
P2 connects to connector P2.
Step 10 Do a visual check to make sure that all fans are operating.
Step 11 Use the dsppwr command to see if system software recognizes correct operation.
Step 12 Secure the fan tray assembly by tightening the captive screws.
Step 13 Attach the clamp for the fan power cord to the chassis.
Step 14 After lower fan tray replacement, return the air intake grille.