Power supply units

Each AC power supply unit contains the components that are shown in Figure 1.Each power supply also contains fans that cool the enclosure. Cool air is drawn in through the front of the enclosure. The air passes over the drives, node canisters, and power supplies. The warmed air is ejected through the rear of each power supply. For optimal cooling, do not obstruct the airflow and ensure that all enclosure components or fillers are installed while the system is operational.

Figure 1. Components of the AC power supply unit for Lenovo Storage V series systems

• 1 Release tab
• 2 Handle
• 3 Power supply LED indicators
• 4 AC power connector

Power supply unit LED indicators

Table 1 lists the LED indicators on the power supply, next to the input power connector. For more information, see Procedure: Understanding the system status using the LEDs.

Table 1. Power supply LED indicators. Enclosure power supply indicators and status

Name	Symbol	Color	State	Meaning
Input current status		Green	OFF	No input power detected.
			ON	Input power detected.
Fault		Amber	OFF	No fault detected.
			ON	A fault within the power supply has been detected.
		Blue		Not used.