54 Installing System ComponentsRemoving a Power SupplyNOTICE: The system requires one power supply for the system to operate normally. The system is in theredundant mode when two power supplies are installed and both power supplies are connected to an AC powersource. Remove and replace only one power supply at a time in a system that is powered on. Operating the systemwith only one power supply installed and without a power supply blank installed for extended periods of time cancause the system to overheat.NOTICE: If only one power supply is installed, it must be installed in the left power supply bay (1).NOTICE: If you connect the system to a power source in the range of 120 to 220 VAC, and if two power suppliesare installed, the second power supply serves as a redundant, hot-plug power source.NOTE: On your rack system, you may have to unlatch and lift the cable management arm if it interferes withpower supply removal. For information about the cable management arm, see the system’s Rack InstallationGuide.1 If your system has a single power supply, turn off the system and all attached peripherals. For a redundantsystem, you can leave the system running and proceed to the next step.2 Disconnect the power cable from the power source.3 Disconnect the power cable from the power supply and remove the cable from the cable retention bracket.NOTICE: On a rack system, you may need to temporarily unlatch and lift the cable management arm. Forinformation about the cable management arm, see the system’s Rack Installation Guide.4 Release the locking tab on the left side of the power supply by pressing in toward the right until the powersupply is released from the chassis. See Figure 3-7.5 Holding the power-supply handle, pull the power supply straight out to clear the chassis.
