1, the first thing to note is to look at the single-phase or three-phase, only a single phase of the general board.
2, there are three three-phase circuit boards, and in each phase of a three-phase three above are generally two can be adjusted to increase the resistance and a low-voltage protection. This time to go one on one with a multimeter and FireWire. Use a screwdriver to adjust the regulator circuit board adjustable resistance, that is, the transfer voltage. Look multimeter 220V when you can jump up. It should be noted that, due to the regulator's board of different manufacturers are not the same, so adjust the regulator to take note of the time, but the difference was not significant.