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Sounds like the issue is most likely the unit not your wiring.
Does it trip immediately when you turn ac on?
First step in troubleshooting is going to be to verify the amp draw on compressor when it trips.Do you have a clamp on meter?
You will need to remove the cover.Locate the 3 wires going to compressor and clamp one single wire at a time.Without the meter you can check a couple of things visually. Make sure the capacitor does not look swollen and make sure all three wires are secure on the compressor
The compressor wires we want to amp are none ground.One is Common One s Run and one is start. The locked rotor indicates that the compressor is locked up, but often a weak or dead capacitor will prevent starting and cause the locked rotor amperage
As a rule of thumb the amp draw should run 70 to 80 per cent of RLA but never exceed the 14.9
If amp draw is high, next step s to check capacitance on the capacitor.If amp draw is normal up until it trips, that would indicate a short ether in compressor or compressor wiring. So then we would remove each wire to compressor and check each of the three terminals to ground .If we have continuity between any terminal and a known ground like a cabinet bolt,compressor is bad.
WE will go from there
Look forward to hearing back