When Ac Power Off During Dc On - NEC Express5800 Maintenance Manual

Chapter 1 Maintenance
5.13

When AC Power Off During DC On

[?] The SYSTEM STATUS LED lights amber or unable to start the system
If AC power isn't supplied to all power supply units during DC power is on due to power failure, etc., error
messages which indicate processor failure or mother board failure are registered and the SYSTEM STATUS
LED may light amber.
→ Those registered error messages are logs accompanying power failure, so there is no problem as to the
system. Turn off the SYSTEM STATUS LED by performing Clear All Faults to clear fault information, and
then restart the system (if the system is power on, restart the system after performing Clear All Faults).
→ Configuring the environment which can be supplied from two electric power companies or using UPS is
recommended as a means to prevent AC power from not being supplied.
Express5800/A1040b, A2040b, A2020b, A2010b Maintenance Guide
5. Troubleshooting
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