and typically a Roof a/c unit is on it's OWN breaker, with no other circuits or outlets, so it sounds like you have lost one 'side' of your 50amp double-pole incoming power, meaning that the 30amp incoming supply has been impacted by your ADAPTER, not allowing the power to reach to other 'breaker' side, which is typically one of your a/c units, a circuit of outlets, and maybe other items, too. Those 'other' items are probably not working, either.
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