Troubleshooting a PDU

If the system management software reports that one or more modular system components have lost power on the same power supply unit, perform the following troubleshooting.

1. Verify that the component's PSU is working correctly.
2. Verify that all of the building's power input mains to the PDUs have power.

   Check the building's electrical circuit panel to ensure that none of the breakers for the PDU inputs are off.

3. Determine if a PDU circuit breaker has tripped.

   See PDU Circuit Breaker Overview.

4. If none of these steps resolve the issue, replace the PDU.

   See Replacing a PDU.