Installation guide

5-11
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
Installing an AC Power Supply in an IGX 8420 or IGX 8430 Node
To install a power supply, do the following:
Step 1 Slide a replacement power supply into the power supply tray and push it to the back. When a supply
reaches the end of the slot in the tray, a slight resistance is encountered. Push the power supply slightly
farther in to seat the supply correctly.
Step 2 Tighten the captive screw until it is finger-tight.
Step 3 Close the hinged door and tighten its retaining screw.
Step 4 Install the air intake grille and press firmly on the top, then center, of the air intake grille until the latch
snaps into place.
Step 5 Use the dsppwr command to check the status and output voltage of the power supply. Make sure that
the status is OK and that the output voltage is 50 V ±2 V.
Replacing a Fan Assembly
This section contains separate descriptions for replacing the cooling units in IGX 8410 and
IGX 8420 or IGX 8430 nodes.
Replacing a Fan Assembly in an IGX 8410 Node
The fan assembly resides below the card cage and has four fans. Individual fans cannot be replaced, so
the whole assembly must be replaced when a failure occurs. See Figure 5-6.
Cooling fan trays are hot-swappable. However, the operation must proceed swiftly to keep the system
cool enough. Otherwise, the system power must be off. Having the replacement fan tray and tools in the
immediate vicinity of the system helps ensure that the procedure goes quickly. The required tools are a
flat-blade screwdriver and a Phillips screwdriver.
To replace the cooling unit assembly:
Step 1 Have the replacement fan try and tools ready.
Step 2 Remove the air intake grille at the front of the system by operating the toggle latch at the top-center of
the grille with a screwdriver, tilting the grille forward, and lifting it out.
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 fan tray.
Step 4 Loosen the captive screws.
Step 5 At the back of the IGX 8410 node, remove the clamp that secures the power cable for the fans to the
chassis.
Step 6 Use a small screw driver 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.