The power management system on our Mobile Suites 38RSSA will default to 30 amp service if it does not see 240vac across L1 and L2. In this mode, it will not permit the 2nd A/C compressor to engage, and it will load shed. I have firsthand knowledge of this since the 50 amp receptacle in the wash rack at the storage facility we use is miswired with both hot legs on the same phase.
Rusty, Sandy, 2 Shelties (Coby & Callie) & Conner the Campground Cat
2016 Ram 3500 Longhorn Crew Cab 4x4 Dually, 385/900 Cummins, Aisin AS69RC, 4.10 axle, 39,100 GCWR, 30,050 trailer tow, B&W RVK3600
Current: 2014.5 DRV Mobile Suites 38RSSA #6972 - Previous: 2004 MS 36RE3 #1291