Fault phenomenon: it can be started, but it stops immediately after starting, and the equipment is in the state of repeated starting.
Fault analysis and treatment: this fault belongs to the equipment fault of frequency sweeping startup mode, and its causes are as follows.
a. If the leading front angle is too small and the repeated start is caused by commutation failure after start-up, use an oscilloscope to appropriately increase the leading front angle of the inverter by observing the if voltage waveform.
b. The load oscillation frequency signal is at the edge of the other excitation scanning frequency signal range, and the scanning range of the other excitation scanning frequency is readjusted.