BP Series Pure Sine Wave Inverter 12VDC 220VAC 300W
1. Burned inside the inverter.
2. Disassembly test, found that the fuse is burnt, the front MOSFET is broken down, and the anti-reverse diode is broken down.
Analysis of the possibility of the cause
1. According to the test results, the fuse is burned out and the front-stage MOSFET is broken down, and the front-stage has a large current passing through it.
2. The anti-reverse diode is broken down, indicating that it is caused by the reverse connection of the DC terminal's positive and negative poles.
Solutions and steps
According to the analysis and judgment of the above two points, the front-end part is burnt due to the reverse connection of the positive and negative electrodes, and the machine is damaged and cannot be repaired.