Dell PowerEdge 2850 - Manual (Page 46)

Replacing a Cooling Fan
1. Ensure that the fan handle is upright and lower the fan into its retention base until the fan is fully seated. Then lower the fan handle until it snaps into
place. See
Figure 6 -1 .
2. Close the system. See " Closing the System " in "Troubleshooting Your System."
Power Supplies
The system is available with optional two hot-pluggable power supplies.
Removing a Power Supply
1. Loosen the locking thumbscrew.
2. Rotate the power-supply handle up until the power supply is released from the chassis. See Figure 6 -2 .
3. Pull the power supply straight out to clear the chassis. See Figure 6 -2 .
Figure 6-2. Removing and Installing a Power Supply
Replacing a Power Supply
1. With the power-supply handle in the extended position, slide the new power supply into the chassis. See Figure 6 -2 .
2. Rotate the handle down until it is completely flush with the power-supply faceplate, and then tighten the locking thumbscrew. See Figure 6 -2 .
Expansion-Card Cage
The removable expansion-card cage simplifies many installation procedures by allowing you to remove the riser board and all installed expansion cards in a
single step.
Removing the Expansion-Card Cage
NOTE: The procedure for installing each individual fan is the same.
NOTICE: The power supplies are hot-pluggable. The system requires one power supply to be installed for the system to operate normally. The system
is in the redundant mode when two power supplies are installed. Remove and replace only one power supply at a time in a system that is powered on.
NOTE: After installing a new power supply, allow several seconds for the system to recognize the power supply and determine whether it is working
properly. The power-on indicator will turn green to signify that the power supply is functioning properly. See Figure 2 -4 .