ABB E21B fault code meaning
ABB / E21B
Series: ACS580MV
TRU Cooling fan 4 warning
drive
Meaning: The temperature relay integrated into the TRU cooling fan 4 has opened.
Possible causes
Source: ACS580MV Firmware Manual P326
ABB / E21B
drive
Meaning: The temperature relay integrated into the TRU cooling fan 4 has opened.
Source: ACS580MV Firmware Manual P326