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Q : How to Troubleshoot Three-Phase Output Voltage Imbalance on the GD100-PV?
A: For the GD100-PV, the customer measured a three-phase voltage imbalance using a multimeter. The voltage imbalance persisted even after replacing the driver board, main power board, and IGBT.
Check the output signals of the control board. A damaged inverter section of the VFD may cause abnormal three-phase output signals. Further inspection of the inverter section and control board is recommended.
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