Delta STO fault code meaning
Delta / STO
Series: CT2000
Alarm locked
AC motor drive
Meaning:
Possible causes
Source: CT2000 Series User Manual (DELTA_IA-MDS_CT2000_UM_SC_20250522) P703
Series: VFD-ED
Alarm locked (the run command can be recorded when an alarm occurs and the drive is stopped)
AC motor drive
Meaning:
Possible causes
Source: VFD-ED Series User Manual (DELTA_IA-MDS_VFD-ED_UM_SC_20170315) P3