Delta EF fault code meaning
Delta / EF
Series: C2000 Plus, MH300, MS300, MX300
External terminal error
AC motor drive
Meaning: When an external error is input, the AC motor drive decelerates according to the setting of parameter 07-20, and the digital operator displays EF.
Possible causes
- External fault
Source: C2000 Plus Series User Manual (DELTA_IA-MDS_C2000 Plus_UM_TC_20250522) P421; MH300 Series User Manual (DELTA_IA-MDS_MH300_UM_TC_20260505) P293; MS300 Series User Manual (DELTA_IA-MDS_MS300_UM_TC_20260417_v2) P246; MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P113
Series: C2000-R
External error
AC motor drive
Meaning:
Possible causes
Source: C2000-R User Manual P202
Series: CFP2000, CH2000, CP2000, DPD-K, ME300, MH300-HS
External terminal error
AC motor drive
Meaning: External error input. The AC motor drive performs the deceleration action according to the setting of parameter 07-20, and the digital operator displays EF.
Possible causes
- External fault
Source: CFP2000 Series User Manual (DELTA_IA-MDS_CFP2000_UM_SC_20250731) P284; CH2000 Series User Manual (DELTA_IA-MDS_CH2000_UM_SC_20251030) P382; CP2000 Series User Manual (DELTA_IA-MDS_CP2000_UM_SC_20250704) P392; DPD-K Series User Manual (DPD-K user manual_20211224) P316; ME300 Series User Manual (DELTA_IA-MDS_ME300_UM_SC_20250407) P180; MH300 Series (High-Speed Models) User Manual (DELTA_IA-MDS_MH300-HS_UM_SC_20241213_v3) P240
Series: CT2000, MS300-HS, VFD-DD, VFD-ED, VFD-VE, VFD-VL
External error signal input
AC motor drive
Meaning:
Possible causes
Source: CT2000 Series User Manual (DELTA_IA-MDS_CT2000_UM_SC_20250522) P247; MS300 (High-speed Models) (DELTA_IA-MDS_VFD MS300_high_UM_TC_20170306) P141; VFD-DD (Ver. F, S, T & V ) (DELTA_IA-MDS_VFD-DD_UM_TC_20170609) P36; VFD-ED Series User Manual (DELTA_IA-MDS_VFD-ED_UM_SC_20170315) P125; Delta VFD-VE Manual P66; Delta VFD-VL Manual P62
Series: MP300
External terminal error
AC motor drive
Meaning: External error input. The AC motor drive decelerates according to the setting of parameter 07-20, and the digital operator displays EF.
Possible causes
- External fault
Source: MPD_MP300 Series User Manual (DELTA_IA-MDS_MPD_UM_SC_20260326) P145
Series: REG2000
External error signal input
regenerative unit
Meaning:
Possible causes
Source: REG2000 Series User Manual (DELTA_IA-MDS_REG2000_UM_SC_20251117) P92
Series: VFD-B, VFD-BP, VFD-BW, VFD-E, VFD-EL-W, VFD-F, VFD-FE, VFD-L2, VFD-M-D, VFD-M, VFD-MP, VFD-P, VFD-S, VFD-V
External error
AC motor drive
Meaning:
Possible causes
Source: Delta VFD-B Manual P2; Delta VFD-BP Manual P51; Delta VFD-BW Manual P72; Delta VFD-E Manual P52; VFD-EL-W Series User Manual P57; Delta VFD-F Manual P1; Delta VFD-FE Manual P41; Delta VFD-L2 Manual P2; Delta VFD-M-D Manual P44; Delta VFD-M Manual P30; Delta VFD-MP Manual P41; Delta VFD-P Manual P46; Delta VFD-S Manual P34; Delta VFD-V Manual P43
Series: VP3000
External error
AC motor drive
Meaning: When an external error input is received, the AC motor drive performs the deceleration action according to the setting of parameter A1-33, and EF is displayed on the digital operator.
Possible causes
- External fault
Source: VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P437
Series: VP3000-E
External error
AC motor drive
Meaning: An external error input causes the AC motor drive to decelerate according to the setting of parameter A1-33. The digital operator displays EF.
Possible causes
- External fault
Source: VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P402