Because the basic principle of the inverter is to provide a voltage-regulated FM power supply for the asynchronous motor to meet energy saving or process requirements, it has three parts: rectification, DC and inverter. If the external voltage is unstable, the DC voltage will drop, so that the inverter part cannot continuously output the set voltage level, which causes the inverter protection to stop.

Finally, We would like to share with engineers the common reasons that may cause the inverters stopping:

1. Whether the power supply voltage is normal, too high or too low will cause downtime.

2, the parameter setting is correct, and some occasions, such as constant pressure water supply, will reach the target pressure, it will automatically stop, etc., less than the target pressure, and then will re-open, this is normal.

3. Whether there are a large number of harmonics in the power supply, this needs to be detected by using a power quality analyzer or a hand-held oscilloscope.

4. The inverter hardware is faulty. Such as contactor and other hardware failures.