ABB AE74 fault code meaning
ABB / AE74
Series: ACS860-REG
Current difference, 12 pulse
drive
Meaning: The DC bus current difference in the 12 pulse unit is excessive (the default limit is 27% of the rated value).
Possible causes
Source: ACS860 Regenerative Rectifier Control Program Firmware Manual P115
Series: ACS880-DIODE
Current difference 12 pulse
drive
Meaning: The DC bus currents of the 12-pulse diode supply units differ too much (default: 27% of the rated value).
Possible causes
Source: ACS880 Diode Supply Control Program P173