1. The external three-machine power supply is powered off or lacks phase. (Check the switch and measure the three-phase voltage)
2. The emergency stop button is faulty or the wire is loose. (Check the emergency stop button and check whether the wire is loose)
3. The air compressor is in automatic parking state. (Check whether the outlet pressure is higher than the setting)
4. The transformer is faulty or the wire is off. (Replace the transformer with a new one or reconnect the wire)
5. The control panel is faulty. (Replace the control panel)
6. The starter coil is faulty or the contact is poor. (Replace the starter or check and maintain the contact)
7. The air compressor is in a faulty state. (Troubleshoot)
8. The drive belt is broken. (Install a new belt)
9. The power switch is tripped or the fuse is disconnected. (Restore the switch after checking the electrical circuit)
10. The oil content at the outlet of the air compressor is too high (the filter smokes when there is no load)