1. You ARE level?
2. Your temps do not compute 0 in the freezer but only 60 in the refer?
3. Based on your temp readings, your Norcold should be in LOCK OUT(n or NO/CO)
4. I believe your temp readings from your last post, but the refer should be locked out.
5. Based on your temp readings, it would indicate a blocked Cooling unit. Your temp readings are exactly what a blocked cooling unit would do. But, I do not believe you have a blocked Cooling Unit.
6. You need an LP pressure test to verify the LP pressure is correct (11.5 inches w/c).
7. You need to operate on 120 and see what happens. Doug
PS, since the refer was removed for the repair, it is possible when they reinstalled, they caused some type of rear ventilation blockage or damaged the upper cabinet that seals off the rear top cabinet of the refer. Being in a slide room, the ventilation is critical, but as I stated, the refer should be in lock out mode.