Power supply units

Each Storwize® V3700 enclosure contains two power supply units. Each power supply unit can provide power to the whole enclosure.

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.

Note: The power supply does not have a power switch. A power supply is active when a power cord is connected to the power connector  4  and to a power source.
Figure 1. Alternating current power supply unit
Alternating current power supply unit
  •  1  Release tab
  •  2  Handle
  •  3  Power supply LED indicators
  •  4  AC power connector
Note: Figure 1 shows the alternating current (AC) power supply that is used in most Storwize V3700 enclosure models. Some enclosure models operate in a direct current (DC) power environment (rather than the AC environment required by the other models in the range). These enclosure models are equipped with the DC power supply that is shown in Figure 2.
Figure 2. DC power supply unit
DC power supply unit
  •  1  Release tab
  •  2  Handle
  •  3  Power supply LED indicators
  •  4  Direct current power connector

Power supply unit LED indicators

Table 1 lists the LED indicators on the power supply, next to the input power connector (AC or DC, depending on power supply model). For more information, see Procedure: Understanding the system status using the LEDs. For information about DC power supply units, see Direct current power supply units.

Table 1. Power supply LED indicators. Enclosure power supply indicators and status
Name Symbol Color State Meaning
Input current status Input current status icon Green OFF No input power detected.
ON Input power detected.
DC output status Direct current output status icon Green OFF The power supply is not providing DC output to the enclosure.
ON The power supply is providing DC output to the enclosure.
Fault Fault icon Amber OFF No fault detected.
ON A fault within the power supply has been detected.
  Icon not used Blue   Not used.