1. Swap any two wires of the three-phase line or move slowly.

2. Adjust the circle making machine appropriately and try again.

3. Check if the wiring terminals are tightened and if electricity is connected to the solenoid valve.

4. Disassemble and replace a total of 6. 3 pieces with a diameter of 35 * 3.5, and 2 pieces with a diameter of 80 * 3.5 1 piece with a diameter of 85 * 3.5.

5. Clean or replace the valve core sealing ring.