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Nail in Solid Brick Puzzle
Knowing a little about air conditioning, I am inclined to doubt that the failure of the unit was anything to do with what you did. If the pressure on the condenser side is too high, the compressor will not start, and an over-current cut-out operates to prevent the motor windings burning out. This circuitry is normally quite separate from the control board - at least in models I have seen. I am assuming that your unit was not an "inverter" model, where control of the compressor is altogether more complicated. Even there I would expect there to be a simple, fail-safe overload cut-out.