I have a kielman 220v single phase fan motor. I need to change the direction the fan runs in. i see 4 wires from the motor. One is ground one is not connected(has 2 black wires) one solid wire and the other (also 2 wires) blue grey. The 2 hot wires are connected to the solid and the blue/grey wires what do i need to do to change the direction of the fan?

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Thanks for the help