Forgive my lack of detail as I'm not the one working on the system (and am a new apprentice)...
The basic situation is that we have a single phase condenser fan rotating backwards. The fan blade has not been changed or flipped. The wiring was moved to the other fans for troubleshooting and the problem transfers to the other fans each time. The capacitors have been replaced as well. The problem remains.
It's a Carrier package unit with two stages and three condenser fans.
I understand how this could happen in 3 phase, but what might cause this to happen in single phase?