Hitachi NAS Platform 4000 Series Hardware Reference Manual page 58

Note: There are no field-serviceable parts in the PSU. If a PSU unit fails for
any reason, replace it. See
information about replacing a power supply.
Status
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.
Status
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 (on page 77)
Table 19 AC power status LED (green/amber)
Status
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
server (on page 82)
Chapter 4: Hitachi NAS Platform server components
Hitachi NAS Platform and Hitachi Unified Storage Series 4000 Hardware Reference
Replacing a power supply unit (on page 77)
Table 17 DC power status LED (green)
Meaning
Table 18 PSU status LED (amber)
Meaning
for more information on replacing a PSU.
Meaning
. Do not pull the power cord.
Power supply units
Restarting an unresponsive
for
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