NEC Express5800/R120b-2 Betriebsanweisung Seite 282

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Troubleshooting 8-9
AC POWER LEDs
There is an AC POWER LED for the power supply unit on the rear.
The LED turns green and flashes when the power supply unit receives AC power from the power
cord, which is connected to the AC inlet. (Flashing amber indicates no AC power is received in any
one of two power supplies in the redundant configuration.)
The LED turns green when the server power switch is turned on. If the LED does not go on when
the server power switch is turned on or if it turns amber, the power supply unit is probably faulty. In
this case, contact your service representative to replace the power supply unit.
NOTE:
When the optional power supply unit is installed, if one power
supply unit fails, the other can be used to continue operations (thereby
providing redundancy). In addition, hot swapping can be performed
(with the power left on) to replace the failed power supply unit without
stopping the system.
AC inlet
Power supply
slot 2
AC POWER LED
Power supply
slot 1
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