Here's the link to the Everchill 10.7 cuft 12 volt refrigerator used in the 2022 Springdale trailer line.
https://primetimerv.com/pdf/117021/W...DC_User_Manual
Reading through the manual, it looks very much like the "no repairs just replace" type of appliance, similar to the electric fireplace/heaters that have been showing up in trailers.
I wouldn't put too much faith in the owner's manual. Here's an example of the "quality of their tech writers"....
If you're not savy enough to disconnect the 12 volt input to the refrigerator (probably behind the appliance and hard to get to), then I would completely remove power from the trailer (both shore power and by disconnecting the battery, let it sit "unpowered" for about 10 or 15 minutes, then reconnect shore power, followed by reconnecting the battery (IN THIS ORDER)... Why? If the battery is not fully charged, connecting it first "MAY" (not will) cause a low voltage condition that might trigger the same malfunction that you current have. Plugging in the trailer will provide the 13.6 VDC produced by the converter which would eliminate the possiblity of a low battery charge affecting the refrigerator as it powers up.....