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 (on page 77)
information about replacing a power supply.
Table 17 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 18 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 (on page 77)
for more information on replacing a PSU.
Table 19 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
. Do not pull the power cord.
Power supply units
Chapter 4: Hitachi NAS Platform server components
Hitachi NAS Platform and Hitachi
Unified
Storage Series 4000 Hardware Reference
58