Delta STor fault code meaning
Delta / STor
Series: MX300, VP3000
STOROM verification failure
AC motor drive
Meaning: STO module ROM read value error
Possible causes
- Control board fault
- 8-117
Source: MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P190; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P438