How to Handle ST-C01 Entering Self-Test Mode?

When using our ST-C01 controller, you may encounter a situation where the screen displays garbled characters. Please do not panic—this indicates that the controller has entered self-test mode.

Step 1: Press RUN/STOP.

Step 2: Press CW.

Step 3: Press CCW.

Step 4: Rotate the knob forward, then rotate it backward.

The steps described above are the solution to this issue. After following these steps, the controller will return to normal operation mode.

Updated on: 06/02/2026