Movement in one direction only one motor error

[jungjaekwon1]

Arduino monster motor in use.
Only move down the left side of the motor.
Try replacing the pot, replace the motor symptoms are the same as the Arduino
Monster is not replaced hayeoteum
Manual operation of the pot reaction in the opposite direction, but no response in one direction

[RacingMat]

Hello
Can you share a picture of your wiring?
What code do you use?
Yours
Mat