IBM Storwize V5000 Gen 2 Series, Quick Installation Manual

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• See the specifications in the product documentation for the required torque values for the
wiring-terminal screws.
Note: In Statement 34 above:
• Replace IEC 60950-1, First Edition with IEC 60950-1, Second Edition Amendment 1.
• The required circuit breaker rating is 20 amps.
DC power supply unit connectors and indicators
Each enclosure can contain two DC power supply units. Each power supply unit can provide power to the
whole enclosure.
The DC power supply units have the components that are shown in Figure 10 on page 11.
Figure 10. DC power supply unit connectors and indicators
1 Release tab
2 Handle
3 Power supply LED indicators
4 Direct current power connector
5 Cable retainer
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 7 on page 11 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.
Table 7. DC power supply LED indicators
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.
Chapter 1. Before you begin the installation 11