Have you ever encountered a situation where your air compressor suddenly shuts down during operation, but restarts normally after clicking the start button again, and no fault information is found in the historical fault log? This type of air compressor shutdown without fault is usually caused by a power interruption to the control panel.
There are generally two situations that cause panel power interruptions and restarts:
The first situation is when the panel restarts regularly, such as restarting every time the solenoid valve is energized. This is usually caused by a short circuit in the solenoid valve. We can remove the panel and, by consulting the manual, identify the solenoid valve wire numbers. Disconnecting these two corresponding wires will prevent the restart. The solution is to replace the solenoid valve coil. It is recommended to replace the entire wire, including the solenoid valve plug, as sometimes the short circuit may be in the wiring or the plug itself. Most air compressor solenoid valves are 220V powered, and a short circuit in the solenoid valve coil, the plug, or due to aging or worn wiring will cause the panel to trigger a protective restart.
The second situation is irregular restarts. If the machine occasionally shuts down during normal operation, this is usually caused by a loose fuse box. How can we diagnose this? Simply bypass the fuse box and use the machine normally for a day, observing if it still shuts down unexpectedly. The solution is to replace the fuse box and fuses.