Switching On And Off The Psu Switch On The Power Supply Unit; Figure 3.5 On Position (Marked "|") Of The Psu Switch On A Power Supply Unit - Fujitsu ETERNUS DX500 S3 Configuration Manual

Chapter 3 General Settings
3.1 Powering On
3.1.2

Switching On and Off the PSU Switch on the Power Supply Unit

Move the PSU switches of the power supply unit in the 2.5" / 3.5" type drive enclosures to the ON position
(marked "|"). Note that power supply units for controller enclosures and high-density drive enclosures do not
have PSU switches.
Make sure all of the PSU switches are in the ON position.

Figure 3.5 ON Position (Marked "|") of the PSU Switch on a Power Supply Unit

Power supply unit (PSU#0)
AC power is supplied to an enclosure.
For the drive enclosure, the POWER LED on the power supply unit emits green lights and the fan revolves at
high speed for 30 seconds.
Drive enclosure
FUJITSU Storage ETERNUS DX500 S3/DX600 S3 Disk storage system Configuration Guide (Basic)
Power supply unit (PSU#1)
Power supply unit (PSU#0)
POWER
LED
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Power supply unit (PSU#1)
P3AM-7732-05ENZ0