If it is genuine, see if your interface is wrong. There are two groups, one group is regulated voltage, and the other three groups are ups output (our unit is like this).

If your UPS doesn't automatically switch to battery output after the mains trip (our company uses Dell, and they are equipped with Sander UPS. After the mains trip, UPS can continue to supply power to the host. That's your fault. You need to replace it.

Don't you have a battery? Or is the battery broken? If you don't save electricity, won't there be no electricity if there is a power outage? Guess, haha, let's find a merchant to change it.

I just saw it. It is said that it takes about 7 minutes ~ ~ ~ for the new genuine product to be powered by battery.

Our company can spend more than half an hour debugging the sander.