A: This is best serviced by a professional because it contains a high voltage output. There is electricity and there is no electricity, first check whether the battery is out of power. And the virtual voltage of the battery is very high, in fact, the internal current capacity has not been connected to the individual load to try to measure whether there is still capacity.
Another may be that the output end of the inverter has a short circuit, a discharge on the current protection, this to check whether the insulation is not good.
1. Mainly the silicon steel sheet of the transformer is loose, which belongs to the transformer dipping paint is not good, and does not affect the use; 2. If the sound is loud, re-paint can be done, no insulating paint, ordinary varnish can also be done; 3. The general squeak 50 Hz current sound is the load big sound small, the load small sound big; 4. The inverter power is very large, need a large battery to promote; Inverter alarm. There's protection. Maybe the battery is dead, or the inverter is heavily loaded.
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①→ This fault mainly checks the oscillation control circuit chip.
②→ Check the excitation circuit components, whether normal.
③→ Check whether the output circuit components are normal.