Dell PowerEdge 2550 - Manual (Page 54)

8. Replace the battery.
Is the problem resolved?
Yes. The battery's charge was low. You have fixed the problem.
No. See " Getting Help " for instructions on obtaining technical assistance.
Troubleshooting Redundant Power Supplies
Your system may contain two optional, redundant power supplies. The two indicators on the back of each power supply (see Figure 7 -5 ) signal the power
supply's current status. If the red (forwardmost) failure indicator lights up, replace the power supply as described in the following procedure.
Figure 7-5. Power Supply Features and Removal
Removing and Replacing a Power Supply
To replace a power supply, perform the following steps.
1. Turn off the system, including any attached peripherals, and disconnect the system from its electrical outlet.
2. Unplug the AC power cable from the faulty power supply.
3. Open the system doors (see " Opening the System Doors ").
4. Remove the power supply:
a. The power supply is secured by a latch on the back panel of the system.
Rotate the top of the power supply latch downward.
b. Grasp the handle on the top of the power supply and lift the power supply straight up from the system.
5. Lower the new power supply into the chassis.
6. Close the power supply latch.
7. Close the system doors.
8. Connect the AC power cable to the new power supply.
Troubleshooting a Cooling Fan
Three cooling fans are installed in the system chassis. (Fan 1 is the outermost fan in the fan assembly.) If you observe that one of the cooling fans is not
operating or if the server management application issues a fan-related error message, perform the following steps to troubleshoot the problem:
WARNING: The power supply is heavy. Support it with both hands when installing or removing it.
WARNING: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System Information document.
NOTE: The power supply will not function until the latch is engaged.