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.