Dwc Power Supply Leds - Lenovo ThinkSystem DW612S System Configuration Manual

Input (AC) power LED (green)
1
Output (DC) power LED (green)
2
There are three LEDs on each power supply:
AC power LED (green): When this LED is lit (green), it indicates that ac power is being supplied to the
1
power supply.
DC power LED (green): When this LED is lit (green), it indicates that dc power is being supplied from the
2
power supply to the enclosure midplane.
Power supply error LED (yellow): When this LED is lit (yellow), it indicates that there is a fault with the
3
power supply.
Note: Before unplugging the ac power cord from the power supply, or removing the power supply from the
enclosure, verify that the capacity of the remaining power supplies are sufficient to meet the minimum power
requirements for all components in the enclosure.

DWC power supply LEDs

This topic provides information about various DWC power supply LED status and corresponding action
suggestions.
See the "Specifications" section in Maintenance Manual of the high-density server for information on minimal
configuration required to start the solution.
The power supplies get electrical power from a 200 - 240 V ac power source and convert the ac input into 12
V outputs. The power supplies are capable of autoranging within the input voltage range. There is one
common power domain for the enclosure that distributes power to each of the DWC tray and modules
through the system midplane.
AC redundancy is achieved by distributing the ac power cord connections between independent ac circuits.
Each DWC power supply has internal water loops and a controller. The power supply controller can be
powered by any installed power supply that is providing power through the midplane.
You have to install all three DWC power supplies regardless of the type of power supply, the enclosure
power load, or selected enclosure power policy.
The enclosure does not support mixing of low input voltage power supplies with high input voltage power
supplies. For example, if you install a power supply with an input voltage of 100 - 127 V ac in a enclosure that
is powered by 200 - 240 V ac power supplies, the 100 - 127 V power supply will not power on. The same
restriction applies to a enclosure that is powered by 100 - 127 V ac power supplies. If you install a 200 - 240
V ac power supply in a enclosure that is powered by 100 - 127 V ac power supplies, the 200 - 240 V ac
power supply will not power on.
The following illustration shows the LEDs on the DWC power supply:
Power supply error LED (yellow)
3
Chapter 2
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Enclosure components
13