Delta occ fault code meaning
Delta / occ
Series: C2000 Plus, MH300, VP3000
IGBT upper and lower bridge short circuit
AC motor drive
Meaning: The AC motor drive detects a short circuit between the upper and lower bridge arms of the IGBT module.
Possible causes
- IGBT fault
- Upper and lower bridge short circuit detection circuit fault
Source: C2000 Plus Series User Manual (DELTA_IA-MDS_C2000 Plus_UM_TC_20250522) P420; MH300 Series User Manual (DELTA_IA-MDS_MH300_UM_TC_20260505) P292; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P437
Series: C2000-R
IGBT upper and lower bridge short circuit
AC motor drive
Meaning:
Possible causes
Source: C2000-R User Manual P217
Series: CFP2000, CH2000, CP2000, MH300-HS, VP3000-E
IGBT upper and lower bridge short circuit
AC motor drive
Meaning: The AC motor drive detected a short circuit between the upper and lower bridge arms of the IGBT module.
Possible causes
- IGBT fault
- Upper and lower bridge short circuit detection circuit fault
Source: CFP2000 Series User Manual (DELTA_IA-MDS_CFP2000_UM_SC_20250731) P283; CH2000 Series User Manual (DELTA_IA-MDS_CH2000_UM_SC_20251030) P381; CP2000 Series User Manual (DELTA_IA-MDS_CP2000_UM_SC_20250704) P391; MH300 Series (High-Speed Models) User Manual (DELTA_IA-MDS_MH300-HS_UM_SC_20241213_v3) P252; VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P402
Series: CT2000, VFD-B
IGBT short circuit protection
AC motor drive
Meaning:
Possible causes
Source: CT2000 Series User Manual (DELTA_IA-MDS_CT2000_UM_SC_20250522) P381; Delta VFD-B Manual P2
Series: DPD-K
IGBT upper and lower bridge short circuit
AC motor drive
Meaning: The AC motor drive detects a short circuit between the upper and lower bridge arms of the IGBT module.
Possible causes
- IGBT fault
- Upper and lower bridge short circuit detection circuit fault
Source: DPD-K Series User Manual (DPD-K user manual_20211224) P316
Series: HES-C
Module overcurrent (IGBT upper-to-lower bridge short circuit)
hydraulic servo drive
Meaning:
Possible causes
Source: HES-C Technical Manual (DELTA_IA-MDS_VFD-HES_UM_TC_20250715) P100
Series: VFD-BP, VFD-F
Drive module error
AC motor drive
Meaning:
Possible causes
Source: Delta VFD-BP Manual P51; Delta VFD-F Manual P1
Series: VFD-BW, VFD-FE
Drive module error
AC motor drive
Meaning:
Possible causes
Source: Delta VFD-BW Manual P72; Delta VFD-FE Manual P41
Series: VFD-ED
Module overcurrent (IGBT upper bridge to lower bridge
AC motor drive
Meaning:
Possible causes
Source: VFD-ED Series User Manual (DELTA_IA-MDS_VFD-ED_UM_SC_20170315) P124
Series: VFD-VL
Module overcurrent (short circuit between upper and lower bridge arms)
AC motor drive
Meaning:
Possible causes
Source: Delta VFD-VL Manual P61