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

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.
DC power supply LED indicators
Each power supply unit has four LED indicators. Table 1 summarizes their possible values and meaning.
The LEDs have a comparable meaning to the LEDs on the AC power supply. Problem diagnosis and service procedures are the same. For details, see Procedure: Understanding the system status using the LEDs.
Name | Label | Color | State | Description |
---|---|---|---|---|
Input status | ![]() |
Green | OFF | No input power detected. |
ON | DC input power detected. | |||
Output status | ![]() |
Green | OFF | PSU is not providing DC output power. |
ON | PSU is providing DC output power. | |||
Fault | ![]() |
Amber | OFF | No fault detected. |
ON | PSU fault was detected. | |||
BLINK | PSU is being identified. A fault might have been detected. | |||
(None) | ![]() |
Blue | N/A | Not used. |