20 About Your SystemPower Indicator CodesThe power supplies have indicators that show whether power is present orwhether a power fault has occurred.• Not lit—AC power is not connected.• Green—In standby mode, a green light indicates that a valid AC source isconnected to the power supply and that the power supply is operational.When the system is on, a green light also indicates that the power supply isproviding DC power to the system.• Amber—Indicates a problem with the power supply.• Alternating green and amber—When hot-adding a power supply, thisindicates that the power supply is mismatched with the other powersupply (a high output power supply and an Energy Smart power supply areinstalled in the same system). Replace the power supply that has theflashing indicator with a power supply that matches the capacity of theother installed power supply.CAUTION: When correcting a power supply mismatch, replace only the powersupply with the flashing indicator. Swapping the opposite power supply to make amatched pair can result in an error condition and unexpected system shutdown.To change from a High Output configuration to an Energy Smart configuration orvice versa, you must power down the system.
