Chapter 1 Components1.1 Controller EnclosureETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Operation-22Copyright 2012 FUJITSU LIMITED P3AM-4842-03ENZ01.1.4.2 Power Supply UnitsThe power supply unit transforms input AC power from a power socket to DC power and suppliespower to each component.Each power supply unit contains fans.Figure 1.15 Power supply unit● Part explanation• InletThis inlet is used to connect a power cord.• PSU switchThis switch is used to turn on and off the AC power supply.• LEDsThe states of LEDs are listed below.Table 1.4 Status and meanings of each LED (power supply unit)LED name Power supply unit statusPOWER AC MISSING PSU FAIL FAN FAIL(blinks green)(off) (off) (off)AC power is supplied to thepower supply unit but theETERNUS DX Disk storagesystem (DC power) is notturned on.(green) (off) (off) (off)The power of the ETERNUSDX Disk storage system (DCpower) is turned on and thepower supply unit isoperating normally.(off) (off) (off) (off)AC power is not supplied topower supply units.(off) (orange) (orange) (off or on)AC power is not supplied tothis power supply unit, butAC power is supplied to theother power supply unit.(off) (orange) (orange) (orange)The power supply unit or thefan in the power supply unitis in error status.InletPSU switchAC MISSING LEDPSU FAIL LEDPOWER LEDFAN FAIL LED
