ABB 501E fault code meaning
ABB / 501E
Series: ACS580MV
Power module HB1 or HB2
drive
Meaning: IGBT repeated desaturation. Repeated desaturation of IGBT in HB1 (half-bridge 1) or HB2 (half-bridge 2) on the power module.
Possible causes
Source: ACS580MV Firmware Manual P334