The power generation is not used for a long time, leading to the loss of residual magnetism contained in the iron core before delivery, and the excitation coil can not establish the due magnetic field. At this time, the engine runs normally but can not generate electricity. This kind of phenomenon is a new machine.Or long-term use of the unit is more.

Treatment method:

1. Press the excitation button if there is one;

2. If there is no excitation button, use the battery to magnetize it;

3, with a light bulb load, overdrive for a few seconds.