Monitoring the power supply

LEDs on the power supply

The power supply has four LEDs. The LEDs indicate whether the power supply or the integrated fan module is functioning normally or there are problems with the hardware. You can also identify any hardware failure associated with the power supplies from the error messages displayed on your storage appliance console.

Location of LEDs

Each power supply, which contains two LEDs, is encased in a device carrier and housed at the rear of the disk shelf. The following illustration shows the location of the power supply LEDs.

Note
The power LED is green. The other three LEDs are amber. See LED status on the LRC/ESH for an illustrated explanation of how the LEDs function.

Power supply console error messages

The following error messages appear on your storage appliance console if an SES element on the power supply fails. For information about replacing the power supply, see Replacing a power supply in a disk shelf.

Error message	Action required
Power supply Element 1: failed	The power supply unit on the left at the back of the disk shelf failed. Contact Network Appliance customer service to replace the power supply.
Power supply Element 2: failed	The power supply unit on the right at the back of the disk shelf failed. Contact Network Appliance customer service to replace the power supply.
Cooling element Element 1: failed	The integrated fan module in the power supply unit on the left at the back of the disk shelf failed. Contact Network Appliance customer service to replace the power supply.
Cooling element Element 2: failed	The integrated fan module in the power supply unit on the right at the back of the disk shelf failed. Contact Network Appliance customer service to replace the power supply.