Does the fault occur immediately upon power-up or only when the motor reaches a certain RPM? At the beginning of my work, I had cases where the engine jerked at startup and my colleague said that to prevent this from happening, you need to increase the acceleration time in the settings and then this will reduce the load on both the network and the mechanism itself. He also sent me the service manual for Panasonic M1X on the ManualMachine website for review and now, as soon as any problems arise, I look at how to solve them. If the inverter overheats, this usually means that the frequency converter fan is clogged with dust and needs to be cleaned.