No output voltage after the BP 600w inverter is turned on and the fault light flashes

No output voltage after the BP 600w inverter is turned on and the fault light flashes

Model

BP series with bypass inverter 600W 12VDC 220VAC


Description

Can not be turned on normally, the fault light flashes after turning on, no output voltage.


Analysis of the possibility of the cause
1. Check the internal circuit, the bus voltage is more than 500V, the auxiliary power supply U5 and U6 of the rear stage are damaged, and the rear MOSfet is damaged.
2. It is judged that the rear MOSfet, the rear driver board, and the driver diode SS220 are damaged.

Solutions and steps

Replace 2 rear MOSfets, rear driver board, and corresponding diode SS220.


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