Chapter 1 Components
1.2 Drive Enclosures
ETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Operation-
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Power supply units
The power supply unit transforms input AC power from a power socket to DC power and supplies power to each
component.
Each power supply unit contains fans.
Figure 1.27 Power supply unit
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Part 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.
•
LEDs
The states of LEDs are listed below.
Table 1.8 Status and meanings of each LED (power supply unit)
LED name
Power supply unit status
POWER
PSU FAIL
AC MISSING
FAN FAIL
(green)
(off)
(off)
(off)
AC power is supplied to the power
supply unit.
(off)
(off)
(off)
(off)
AC power is not supplied to the power
supply unit.
(off)
(amber)
(amber)
(off or amber)
AC power is not supplied to this power
supply unit, but AC power is supplied
to the other power supply unit.
(off)
(amber)
(amber)
(amber)
The power supply unit or the fan in the
power supply unit is in error status.
Inlet
PSU switch
PSU FAIL LED
AC MISSING LED
POWER LED
FAN FAIL LED