The fridge needs DC to power its controls. So maybe on shore power the converter was supplying the DC even though the use/store or battery disconnect switch was off. Now that there is no shore power the fridge is getting no DC from the batteries. Turn the switch on and see what happens.
If it was already on, check the condition of your batteries. They may have died while in storage.
If the batteries are ok, maybe the propane is off. But I don't think that would give the no DC error.
David
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