Once the unit is plugged in it has a steady beeping. There is no error code just the flashing of lights and the beeping
Most new window units have a ground fault circuit. More than likely, the outlet you are using is Not grounded or the Neutral and Hot side are reversed. They make a tester you can purchase at most home improvement stores. I would go buy one and test the outlet. You could have other outlets with the same problem. You have to use a 3 wire outlet. Large side of outlet=neutral, small side of outlet=hot, round or arched hole=earth ground.
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