The Dutchmen Owner's Manual does not specify the refrigerator type. It could be absorption or compressor. It could be powered by (propane + 12 volts), (12 volts +12 volts), or (120 volts + 12 volts), or (just 120 volts).
Please post make and model of refrigerator for better advice. Did the TT have an OEM installed inverter?
Common configuration is an Absorption refrigerator that runs on (propane +12 volts) or (120 volts + 12 volts).
Absorption refrigerators use 12 volts for controls and either propane or 120 volts for cooling. Compressor refrigerators run on either 12 volts, or 120 volts. Travel trailers with a 120 volt compressor refrigerator usually also come with an inverter to power it without shore power or generator.
Dutchman Kodiak Cub KD176RD 2018
Nissan Pathfinder 2015