Delta oL3 fault code meaning
Delta / oL3
Series: C2000 Plus, VP3000
Low-frequency overload
AC motor drive
Meaning: Load approaching the power module limit
Possible causes
- Power module overload
- 5. Select an AC motor drive with a higher power rating
Source: C2000 Plus Series User Manual (DELTA_IA-MDS_C2000 Plus_UM_TC_20250522) P422; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P437
Series: C2000-R, MS300-HS
Low-frequency overload
AC motor drive
Meaning:
Possible causes
Source: C2000-R User Manual P219; MS300 (High-Speed Models) (DELTA_IA-MDS_VFD MS300_high_UM_TC_20170306) P142
Series: CFP2000, CH2000, CP2000, VP3000-E
Low-frequency overload
AC motor drive
Meaning: Load approaching power module limit
Possible causes
- Power module overload
- 5. Select an AC motor drive with a higher power rating.
- 7. If the AC motor drive is in V/F control mode, reduce the output voltage for low-frequency operation.
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; VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P402
Series: ME300
Power module overload
AC motor drive
Meaning: Load approaching the power module limit
Possible causes
- Power module overload
- 5. Select an AC motor drive with a higher power rating
Source: ME300 Series User Manual (DELTA_IA-MDS_ME300_UM_SC_20250407) P181
Series: MH300
Power module overload
AC motor drive
Meaning: Load approaching the power module limit
Possible causes
- Power module overload
- 5. Select an AC motor drive with a higher power rating.
- 7. If the AC motor drive is in V/F control mode, reduce the output voltage for low-frequency operation.
Source: MH300 Series User Manual (DELTA_IA-MDS_MH300_UM_TC_20260505) P293
Series: MH300-HS
Power module overload
AC motor drive
Meaning: Load approaching power module limit
Possible causes
- Power module overload
- 5. Select an AC motor drive with a higher power rating.
- 7. If the AC motor drive is in V/F control mode, reduce the output voltage for low-frequency operation.
Source: MH300 Series (High-Speed Models) User Manual (DELTA_IA-MDS_MH300-HS_UM_SC_20241213_v3) P253
Series: MP300
Low-frequency overload
AC motor drive
Meaning: Low-frequency high-current protection.
Possible causes
- Load on the AC motor drive's internal power components is too large.
- 4. Increase the acceleration time.
- 5. Select an AC motor drive with a higher power rating.
- 6. Reduce the current limit (parameter 06-03, parameter 06-04).
Source: MPD_MP300 Series User Manual (DELTA_IA-MDS_MPD_UM_SC_20260326) P145
Series: MS300, MX300
Power module overload
AC motor drive
Meaning: The load is approaching the power module limit.
Possible causes
- Power module overload
- 1.
- 2.
- 3.
- 4.
- 5.
- Select an AC motor drive with a higher power rating.
- 6.
- 7.
- If the AC motor drive is in V/F control mode, reduce the output voltage for low-frequency operation.
Source: MS300 Series User Manual (DELTA_IA-MDS_MS300_UM_TC_20260417_v2) P247; MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P139
Series: VFD-V
Overtorque detection during constant-speed operation
AC motor drive
Meaning:
Possible causes
Source: Delta VFD-V Manual P16