ABB D402 fault code meaning
ABB / D402
Series: ACH531, ACQ531
High level
drive
Meaning: The water level has reached the upper limit.
Possible causes
Source: ACH531 Firmware Manual P144; ACQ531 Firmware Manual P125
Series: ACQ580
High liquid level
drive
Meaning: Level action. The water level has reached the upper limit.
Possible causes
Source: ACQ580 Pump Control Program Firmware Manual P202
Series: ACS530
High water level
drive
Meaning: The water level has reached the high water level limit.
Possible causes
Source: ACS530 Firmware Manual P279