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I would start by checking the capacitor. Do you have model on unit?
I do how ever have questions about the locked rotor. If compressor draws locked rotor, breaker should definitely trip. Locked rotor is probably around 130 amps, so breaker should be tripping
Locked rotor is actually about 148 amps on this unit.
Wiring diagram shows a hard start as optional. Do you have the hard tart kit with a black round start capacitor?
Start cap and relay