My Rv came with Carrier Air V.. Both of them have done this.
No on the carerier the Green Light blinks 5-5-5-5-5-5- when this happens
What is happening: The cooling system has lost refrigerant and is no longer working, so the unit runs a bit, does not cool down (it has a temp sensor in it) and the compter says "Not working" flashes the "power Issue" code and waits a bit, then it tries again.
I"m not saying that is the problem with yorus, but on both mine that was the problem, we are trying to replace teh 2nd one now
NOTE: if your current units are 13.5K BTU, consider upgrading to 15K. Modern units take less pwoer per BTU and it's getting hotter out there.