ABB A2C1 fault code meaning
ABB / A2C1
Series: ACH531, ACQ531
BU current difference
drive
Meaning: Current difference check warning. Informational warning.
Possible causes
Source: ACH531 Firmware Manual P125; ACQ531 Firmware Manual P107
Series: ACS530
BU current difference
drive
Meaning: Current difference detection warning.
Possible causes
Source: ACS530 Firmware Manual P259