1. External power supply of three machines is cut off or out of phase.(check the switch and measure the three-phase voltage)
2. Fault of emergency stop button or loose wire.(check the emergency stop button, check whether the wire is loose)
3. The air compressor is in the state of automatic shutdown.(check whether the outlet pressure is higher than the setting)
4. Transformer failure or wire falling off.(replace the new transformer or reconnect the wires)
5. Control panel failure.(replace control panel)
6. Fault of starter coil or poor contact of contacts.(check and maintain replacement of starter or contact)
7. The air compressor is in a malfunctioning state.(troubleshooting)
8. Broken transmission belt.(install new belt)
9. Power switch trip or fuse disconnect.(return the switch after checking the electrical circuit)
10. High oil content at the outlet of the air compressor (smoke from the filter when there is no load)