Cause : Measurement circuit ADC comes when measurement circuit fault. This means there's an issue with the Analog-to-Digital Converter (ADC) circuit within the drive's power unit.

The fault code 5691 in your ABB ACS560 drive indicates a measurement circuit ADC fault. This fault signifies an issue with the Analog-to-Digital Converter (ADC) within the drive's measurement circuit.

• If the control unit is externally powered, check the setting of parameter 95.04 Control board supply.