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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.
A drive enclosure has two power supply units.
Each power supply unit contains fans.
Figure 28 Power Supply Unit (Drive Enclosure)
1 2
POWER LED
F
AULT LED AC MISSING LED
FAN FAIL LED
1 PSU switch
This switch is used to turn on and off the AC power supply.
2 Inlet
This inlet is used to connect a power cord.
The LEDs turn on or blink to indicate the statuses that are listed below.
Table 22 Status and Meaning of Each LED (Power Supply Unit (Drive Enclosure))
LED name LED status Meaning
POWER
(green)
AC power is supplied to the power supply unit.
(blinks green)
AC power is supplied to the power supply unit, but DC power is not
supplied to the ETERNUS AF
.
FAULT
(amber)
AC power is not supplied to the power supply unit.
AC MISSING
(amber)
AC power is not supplied to this power supply unit, but AC power is
supplied to the other power supply unit.
FAN FAIL
(amber)
The power supply unit or the fan in the power supply unit is in error
status.
A. Component Names
Drive Enclosure
86 Operation Guide (Basic)
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