Dell PowerVault NX3000 - Manual (Page 154)

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Troubleshooting Your System
2 Turn off the system and disconnect it from the electrical outlet for at least
one hour.
3 Reconnect the system to the electrical outlet and turn on the system.
4 Enter the System Setup program.
If the date and time are not correct in the System Setup program, replace
the battery. See "System Battery."
WARNING:
Only trained service technicians are authorized to remove the system
cover and access any of the components inside the system. Before you begin this
procedure, review the safety instructions that came with the system.
If the problem is not resolved by replacing the battery, see "Getting Help."
Troubleshooting Power Supplies
CAUTION:
At least one power supply must be installed for the system to operate.
Operating the system with only one power supply installed for extended periods of
time without a power-supply blank installed in the PS2 power-supply bay can
cause the system to overheat.
1 Identify the faulty power supply by the power supply's status indicator. See
"Power Indicator Codes."
CAUTION:
If troubleshooting a power supply mismatch error, replace only the
power supply with the flashing indicator. Swapping the opposite power supply to
make a matched pair can result in an error condition and unexpected system
shutdown. To change from a High Output configuration to an Energy Smart
configuration or vice versa, you must power down the system.
2 Reseat the power supply by removing and reinstalling it. See "Removing a
Power Supply" and "Replacing a Power Supply."
NOTE:
After installing a power supply, allow several seconds for the system
to recognize the power supply and to determine if it is working properly. The
status indicator turns green to signify that the power supply is functioning
properly.
If the problem persists, replace the faulty power supply with the same type
of power supply.
If the problem persists, see "Getting Help."