Delta oPL1 fault code meaning
Delta / oPL1
Series: ME300, MH300-HS, MH300, MS300, MX300
Output phase loss: phase U
AC motor drive
Meaning: U phase output phase loss
Possible causes
- Motor three-phase impedance imbalance
- Is there a wiring problem?
- Is the motor a single-phase motor?
- Select a three-phase motor.
- Is current Sensor faulty?
- Is the AC motor drive capacity much greater than the motor capacity?
- Select an AC motor drive and motor with matching capacities.
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; 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: MP300
Output phase U loss
AC motor drive
Meaning: Output phase U loss.
Possible causes
- Motor three-phase impedance imbalance
- Is there a wiring problem?
- Is the motor a single-phase motor?
- Select a three-phase motor.
- Is current Sensor faulty?
- Is the AC motor drive capacity much greater than the motor capacity?
- Select an AC motor drive and motor with matching capacities.
Source: MPD_MP300 Series User Manual (DELTA_IA-MDS_MPD_UM_SC_20260326) P145