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A: Switching the multimeter to Diode position and test as follows:
1. Set the multimeter to Diode position, connect the black hand with "+", then connect the red hand with R、S、T、U、V、W in order, if all the values is between 0.3--0.5V, both the rectifier and IGBT upper bridge are good.
2. Contrary, connect the red hand with "--", then connect the black hand with R、S、T、U、V、W in order, if all the values is between 0.3--0.5V, both the rectifier and IGBT lower bridge are good.
If the test values is highly unbalance, the rectifier or the IGBT must be broken. And you can't power on in this situation.
More details, please see the attached file.
Notice: Please make sure that the inverter no power, so we call it static test.
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