Delta dEb fault code meaning
Delta / dEb
Series: C2000 Plus, CH2000, DPD-K
Energy regeneration action during deceleration
AC motor drive
Meaning: If parameter 07-13 is nonzero and a momentary power interruption or power failure causes the DC bus voltage to fall below the dEb activation level, the dEb function activates to decelerate the motor to a stop. dEb is displayed during this process.
Possible causes
- Unstable power supply or power failure
- Another large load starts in the power supply system
- Use a separate power supply system from that used for heavy loads.
Source: C2000 Plus Series User Manual (DELTA_IA-MDS_C2000 Plus_UM_TC_20250522) P421; CH2000 Series User Manual (DELTA_IA-MDS_CH2000_UM_SC_20251030) P382; DPD-K Series User Manual (DPD-K user manual_20211224) P317
Series: C2000-R, CFP2000, CT2000
Energy regeneration action during deceleration
AC motor drive
Meaning:
Possible causes
Source: C2000-R User Manual P218; CFP2000 Series User Manual (DELTA_IA-MDS_CFP2000_UM_SC_20250731) P537; CT2000 Series User Manual (DELTA_IA-MDS_CT2000_UM_SC_20250522) P248
Series: CP2000
The frequency does not return to its previous value after power is restored during auto acceleration/deceleration
AC motor drive
Meaning:
Possible causes
Source: CP2000 Series User Manual (DELTA_IA-MDS_CP2000_UM_SC_20250704) P545
Series: ME300, MH300-HS, MH300, MX300
Energy regeneration action during deceleration
AC motor drive
Meaning: As long as parameter 07-13 is nonzero and a momentary power interruption or power failure causes the DC bus voltage to fall below dEb
Possible causes
- Unstable power supply or power failure
- Another large load starts in the power supply system
- Use a separate power supply system from that used for heavy loads.
Source: ME300 Series User Manual (DELTA_IA-MDS_ME300_UM_SC_20250407) P181; MH300 Series (High-Speed Models) User Manual (DELTA_IA-MDS_MH300-HS_UM_SC_20241213_v3) P253; MH300 Series User Manual (DELTA_IA-MDS_MH300_UM_TC_20260505) P293; MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P138
Series: MS300
Energy regeneration action during deceleration
AC motor drive
Meaning: If parameter 07-13 is nonzero and a momentary power interruption or power failure causes the DC bus voltage to fall below the dEb action level, the dEb function activates to decelerate the motor to a stop. dEb is displayed during this process.
Possible causes
- Unstable power supply or power failure
- Another large load starts in the power supply system
- Use a separate power supply system from that used by heavy loads.
Source: MS300 Series User Manual (DELTA_IA-MDS_MS300_UM_TC_20260417_v2) P247
Series: MS300-HS, VFD-VE
Error
AC motor drive
Meaning:
Possible causes
Source: MS300 (high-speed model) (DELTA_IA-MDS_VFD MS300_high_UM_TC_20170306) P141; Delta VFD-VE Manual P66
Series: VP3000-E, VP3000
Energy regeneration action during deceleration
AC motor drive
Meaning: Energy regeneration action during deceleration
Possible causes
- Momentary power supply interruption or supply voltage too low or unstable /
- A sudden heavy load causes a voltage drop
- Unexpected power supply shutdown / power failure
Source: VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P166; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P202