Z axis only can operate in cw direction


Hey guys,
I am a beginner in this area.
I used snapmaker for making some model by 3D printed function.
Unfortunately, I faced some problems a week ago, so I updated to the newest version (2.11) and try to fix the problems.
My z-axis linear module connect on the z-axis port on the controller.
And it can not move ccw direction. not matter I operate home axis mode, calibration, jog mode.
The problem would be made by two reasons, hardware or firmware problem.

  1. Linear module hardware problem: I connect the z-axis linear module to another port on the controller (x-axis and y-axis) and it works correctly. So it is not a hardware problem
    Has anyone faced this problem too?