1. Improper operation: the plasma cutting machine needs the interaction of electricity and gas. Improper operation will cause the equipment to leak without ignition.
2. Solenoid valve problem: When the air is not exhausted, you can check whether the intake solenoid valve is broken. Open the cover of the machine, and find a round or square part along the air inlet pipe with the power supply wiring on it. Unplug the pipe at the air inlet to see if there is any gas flowing out. If no gas flows out, check whether the upper pipeline is blocked.
3. Control panel and circuit failure: Damage to the control panel or circuit failure will cause the plasma cutting machine to fail to exhaust. Need to check and repair or replace damaged parts.