ISF fault in Emotron VSB Drive

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ISF fault indicates Input power supply abnormal. This means there is an issue with the incoming AC power supply, such as severe phase imbalance or a wiring issue. Possible Causes: 1: Serious voltage imbalance among three phases of power supply. 2: Abnormal bus capacitance. 3: Abnormal input wiring of power supply. Solutions: 1: Check power grid voltage. 2: Seek services. 3: Check power supply input wiring.

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