1. Disconnect the power supply and do not connect any power wiring to the input and output of VFD.

2. Switch the electric meter to diode position. Use black stick to touch DC+ (+1 +2) and use the red stick to touch R, S, T, U, V, W. The measured value is forward bias 0.4.



3. Use the red stick to touch DC- (-) and the black stick to touch R, S, T, U, V, W. The measured value is forward bias 0.4.