Delta LvA fault code meaning
Delta / LvA
Series: C2000 Plus, CFP2000, CH2000, CP2000, ME300, MH300-HS, MH300, MS300, MX300
Undervoltage during acceleration
AC motor drive
Meaning: During acceleration, the AC motor drive detects that the voltage on the internal high-voltage DC side is below the value set in parameter 06-00.
Possible causes
- Power failure occurred
- Supply voltage fluctuation
- Check whether a large-capacity motor is starting.
- Increase the capacity of the power supply system equipment.
- Load too large
- Common DC bus
- Check whether a jumper is installed between +1 and +2, or whether an additional
- DC reactor
- Connect a jumper or DC reactor between terminals +1 and +2.
Source: C2000 Plus Series User Manual (DELTA_IA-MDS_C2000 Plus_UM_TC_20250522) P420; 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; 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) P252; MH300 Series User Manual (DELTA_IA-MDS_MH300_UM_TC_20260505) P292; MS300 Series User Manual (DELTA_IA-MDS_MS300_UM_TC_20260417_v2) P246; MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P137
Series: C2000-R
Undervoltage during acceleration
AC motor drive
Meaning:
Possible causes
Source: C2000-R User Manual P217
Series: CT2000, MS300-HS, VFD-DD, VFD-ED, VFD-VE, VFD-VL
Undervoltage during acceleration
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) P35; VFD-ED Series User Manual (DELTA_IA-MDS_VFD-ED_UM_SC_20170315) P125; Delta VFD-VE Manual P65; Delta VFD-VL Manual P61
Series: DPD-K
Undervoltage during acceleration
AC motor drive
Meaning: During acceleration, the AC motor drive detects that the voltage on the internal high-voltage DC side is below the value set in parameter 06-00.
Possible causes
- Power failure occurred
- Supply voltage fluctuation
- Check whether a large-capacity motor is starting.
- Increase the capacity of the power supply system equipment.
- Load too large
- Common DC bus
- Check whether a jumper is installed between +1 and +2, or whether an additional
- DC reactor
- Connect a jumper or DC reactor between terminals +1 and +2.
Source: DPD-K Series User Manual (DPD-K user manual_20211224) P316
Series: HES-C
Undervoltage during acceleration
hydraulic servo drive
Meaning:
Possible causes
Source: HES-C Technical Manual (DELTA_IA-MDS_VFD-HES_UM_TC_20250715) P100
Series: MP300
Undervoltage during acceleration
AC motor drive
Meaning: During acceleration, the AC motor drive detected that the internal high-voltage DC-side voltage was below the value set in parameter 06-00.
Possible causes
- Power failure occurred
- Supply voltage fluctuation
- Check whether a large-capacity motor is starting.
- Increase the capacity of the power supply system equipment.
- Load too large
Source: MPD_MP300 Series User Manual (DELTA_IA-MDS_MPD_UM_SC_20260326) P144
Series: VP3000-E, VP3000
Undervoltage during acceleration
AC motor drive
Meaning: During acceleration, the AC motor drive detects that the internal high-voltage DC bus voltage is below the setting of parameter H1-02.
Possible causes
- Power failure occurred
- Supply voltage fluctuation
- Check whether a large-capacity motor is starting.
- Increase the capacity of the power supply system equipment.
- Load too large
Source: VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P402; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P437