The system reports that there is a bad power supply. The power supplies for both the sensor and the storage are redundant and hot-swappable. The most common problem with the power is a loose power cord.
The power may have been interrupted by a power change in the data center, loose power cords (both ends), loose power supply, or a failed power supply.
To diagnose the power supply failure, start with the easy and least expensive steps.
There are very good diagnostics for Dell hardware. The iDRAC on the server and the Web UI for the storage array will display any faults found. These diagnostics are also able to collect logs and configuration. Connect to the iDRAC using your browser and review the system status on the home page. After checking for issues in the environment and the power cords, are there any reported failures?
To review the hardware status of the storage array, you can use your browser by pointing it to the IP.
The cause will be important. If it says "The power supply is not receiving any power" then check the power cord attached to the power supply indicated, Left or Right. Check both supplies and both ends of the power cords. If it is in a Failed state, take a snapshot as supporting evidence for Dell that we have performed some amount of diagnostics.
For the server side of the system, there is also a Web UI called the iDRAC. This should be set up with an IP address and a cable attached.
If there is no current issue on either the storage array or iDRAC server console then the problem has been resolved. Both systems will have historical records of any failures in the past. Review the records and search for the failure and the recovery.
All power supplies are fully redundant. The system should be running properly but it is vulnerable to future power problems. Let support know what you find.