ABB D403 fault code meaning
ABB / D403
Series: ACH531, ACQ531
Low level
drive
Meaning: The water level has reached the lower limit.
Possible causes
Source: ACH531 Firmware Manual P144; ACQ531 Firmware Manual P125
Series: ACQ580
Low liquid level
drive
Meaning: Level action. The water level has reached the lower limit.
Possible causes
Source: ACQ580 Pump Control Program Firmware Manual P202
Series: ACS530
Low water level
drive
Meaning: The water level has reached the low water level limit.
Possible causes
Source: ACS530 Firmware Manual P279