Hardware Description and Basic Operations Storage Modules
U41840-J-Z125-7-76 69
Figure 29: Power supply unit
Explanation
● Inlet: This inlet is used to connect a power cord.
● PSU switch: This switch is used to turn on and off the AC power supply.
Table 12: Status and meanings of each LED (power supply unit)
LED name Description
POWER AC MISSING PSU FAIL FAN FAIL
green off off off AC power is supplied to the power
supply unit but the ETERNUS DX Disk
storage system (DC power) is not
turned on.
green off off off The power of the ETERNUS DX Disk
storage system (DC power) is turned
on and the power supply unit is
operating normally.
off off off off AC power is not supplied to power
supply units.
off orange orange off or on AC power is not supplied to this power
supply unit, but AC power is supplied
to the other power supply unit.
off orange orange orange The power supply unit or the fan in the
power supply unit is in error status.
POWER LED
AC MISSING LED
PSU FAIL LED
FAN FAIL LED
Inlet
PSU switch
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