Power supply units

NAS Platform and Unified Storage Series 4000 Hardware Reference

Version
14.8.x
Audience
anonymous
Part Number
MK-92HNAS030-28

The server has dual, hot-swappable, load sharing, AC power supply units (PSUs). The PSUs are accessible from the rear of the server.

The server monitors the operational status of the power supply modules so that the management interfaces can indicate the physical location of the failed PSU. LED indicators provide PSU status information for the state of the PSU.

Figure. Power supply unit details

Item Description
1 PSU fan exhaust
2 Power cord connector
3 PSU retention latch
4 PSU handle
5 DC power status LED
6 PSU status LED
7 AC power status LED
Note: There are no field-serviceable parts in the PSU. If a PSU unit fails for any reason, replace it. See Replacing a power supply unit for information about replacing a power supply.
Table. DC power status LED (green)
Status Meaning
Green DC output operating normally
Off DC output not operating

If the DC Power status LED is off, unplug the power cable, wait 10 seconds, then reconnect the cable. If the DC Power Status LED remains off, the PSU has failed and must be replaced.

Table. PSU status LED (amber)
Status Meaning
Off PSU operating normally
Amber PSU internal failure (over temperature, fan, or internal component)

If the PSU status LED is on, unplug the power cable, wait 10 minutes, then reconnect the cable. If the PSU Status LED remains off, the PSU has failed and must be replaced. See Replacing a power supply unit for more information on replacing a PSU.

Table. AC power status LED (green/amber)
Status Meaning
Green Receiving AC power and operating normally
Off Not receiving AC power (check mains and power cable connections)

Mains power connections are an IEC inlet in each power supply. Each PSU is only powered from its mains inlet. Two power feeds are required for the system. PSU units do not have an on/off switch. To turn on power, simply connect the power cable. To turn off the unit, remove the power cable.

When both PSUs are installed, if only one PSU is connected and receiving adequate power, the fans on both PSUs will operate, but only the PSU receiving power will provide power to the server.

Each power supply auto-ranges over an input range of 100V to 240V AC, 50 Hz to 60 Hz.

CAUTION:
If the server is non-responsive, see Restarting an unresponsive server. Do not pull the power cord.