Delta oSL fault code meaning
Delta / oSL
Series: C2000 Plus
Excessive slip
AC motor drive
Meaning: Excessive slip warning. Maximum slip (parameter 10-29) is used as the reference. When the AC motor drive output is at steady speed, if F>H or F<H exceeds the level in parameter 07-29 for longer than the time set in parameter 07- 30, parameter 07-29 of 100% = parameter 10-29.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters 07-29, 07-30, and 10-29
- Is the set value appropriate?
Source: C2000 Plus Series User Manual (DELTA_IA-MDS_C2000 Plus_UM_TC_20250522) P407
Series: C2000-R, CT2000, MH300-HS, VFD-ED
Slip error
AC motor drive
Meaning:
Possible causes
Source: C2000-R User Manual P204; CT2000 Series User Manual (DELTA_IA-MDS_CT2000_UM_SC_20250522) P234; MH300 Series (High-Speed Models) User Manual (DELTA_IA-MDS_MH300-HS_UM_SC_20241213_v3) P311; VFD-ED Series User Manual (DELTA_IA-MDS_VFD-ED_UM_SC_20170315) P105
Series: CFP2000
Excessive slip
AC motor drive
Meaning: Excessive slip warning. When the AC motor drive output is at a steady speed, if F > H or F < H exceeds the level specified by parameter 07-29 for longer than the time set by parameter 07-30, parameter 07-29 of 100% = parameter 10-29.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters 07-29, 07-30, and 10-29
- Is the set value appropriate?
Source: CFP2000 Series User Manual (DELTA_IA-MDS_CFP2000_UM_SC_20250731) P272
Series: CH2000
Excessive slip
AC motor drive
Meaning: Excessive slip warning. Using the maximum slip (parameter 10-29) as the reference, when the AC motor drive output is at a steady speed and F > H or F < H exceeds the level in parameter 07-29 for longer than the time set in parameter 07-30, parameter 07-29 of 100% = parameter 10- 29.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters 07-29, 07-30, and 10-29
- Is the set value appropriate?
Source: CH2000 Series User Manual (DELTA_IA-MDS_CH2000_UM_SC_20251030) P368
Series: CP2000
Excessive slip
AC motor drive
Meaning: Excessive slip warning. When the AC motor drive output is at a steady speed, if F > H or F < H exceeds the level specified by parameter 07-29 for longer than the time set in parameter 07-30, parameter 07- 29 of 100% = parameter 10-29.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters 07-29, 07-30, and 10-29
- Is the set value appropriate?
Source: CP2000 Series User Manual (DELTA_IA-MDS_CP2000_UM_SC_20250704) P380
Series: DPD-K, ME300, MP300
Excessive slip
AC motor drive
Meaning: Excessive slip warning. Using the maximum slip (parameter 10-29) as the basis, when the AC motor drive output is at a steady speed, if F > H or F < H exceeds the threshold in parameter 07-29 for longer than the time set in parameter 07-30, parameter 07-29 of 100% = parameter 10-29.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters 07-29, 07-30, and 10-29
- Is the set value appropriate?
Source: DPD-K Series User Manual (DPD-K user manual_20211224) P305; ME300 Series User Manual (DELTA_IA-MDS_ME300_UM_SC_20250407) P171; MPD_MP300 Series User Manual (DELTA_IA-MDS_MPD_UM_SC_20260326) P332
Series: MH300
Excessive slip
AC motor drive
Meaning: Excessive slip warning. Using the maximum slip (parameter 10-29) as the reference, when the AC motor drive output is at steady speed, if F > H or F < H exceeds the level specified by parameter 07-29 for longer than the time set in parameter 07-30, parameter 07-29 of 100% = parameter 10-29.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters 07-29, 07-30, and 10-29
- Is the set value appropriate?
Source: MH300 Series User Manual (DELTA_IA-MDS_MH300_UM_TC_20260505) P279
Series: MS300
Excessive slip
AC motor drive
Meaning: The excessive slip warning uses the maximum slip (parameter 10-29) as its basis. When the AC motor drive output is at constant speed, if F > H or F < H exceeds the condition specified by parameter 07-29 for longer than the time set in parameter 07-30, parameter 07-29 of 100% = parameter 10-29.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters 07-29, 07-30, and 10-29
- Is the set value appropriate?
Source: MS300 Series User Manual (DELTA_IA-MDS_MS300_UM_TC_20260417_v2) P234
Series: MX300
Excessive slip
AC motor drive
Meaning: The excessive slip warning uses the maximum slip (parameter 10-29) as its reference. When the AC motor drive output is at steady speed, if F > H or F < H exceeds the level specified by parameter 07-29 for longer than the time set in parameter 07-30, parameter 07-29 of 100% = parameter 10-29.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters 07-29, 07-30, and 10-29
- Whether the values are appropriate
- 8-21
Source: MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P139
Series: VFD-VE
Slip error
AC motor drive
Meaning:
Possible causes
Source: Delta VFD-VE Instruction Manual P66
Series: VP3000-E, VP3000
Excessive slip
AC motor drive
Meaning: Excessive slip warning. Maximum slip (parameter H5-50) is used as the reference. When the AC motor drive output is at a steady speed, if F >H or F < H exceeds the level in parameter H5-54 for longer than the time set in parameter H5-55, oSL occurs. oSL occurs only when using a standard induction motor.
Possible causes
- Are the motor parameters correct?
- Load too large
- Reduce the load.
- Settings of parameters H5-54, H5-55, and H5-48
- Is the set value appropriate?
Source: VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P255; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P292