Dell 7910 owner manual

Convention	Power indicator	Condition
	pattern
		NOTE: For AC power supplies, use only PSUs with the Extended
		Power Performance (EPP) label on the back. Mixing PSUs from
		previous generations of servers can result in a PSU mismatch
		condition or failure to power on.
D	Flashing amber	Indicates a problem with the power supply unit.
		CAUTION: When correcting a power supply unit mismatch,
		replace only the power supply unit with the flashing indicator.
		Swapping the opposite power supply unit to make a matched
		pair can result in an error condition and unexpected system
		shutdown. To change from a High Output configuration to a
		Low Output configuration or vice versa, you must power
		down the system.
		CAUTION: AC power supplies support both 220 V and 110 V
		input voltages with the exception of Titanium power supplies,
		which support only 220 V. When two identical power supplies
		receive different input voltages, they can output different
		wattages, and trigger a mismatch.
		CAUTION: If two power supplies are used, they must be of the
		same type and have the same maximum output power.
		CAUTION: Combining AC and DC power supplies is not
		supported and triggers a mismatch.
E	Not lit	Power is not connected.

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