GS20 Fault E.OC — Overcurrent During Operation
What This Fault Means
E.OC indicates the drive's output current exceeded the overcurrent trip level during normal operation. Unlike E.OCA (acceleration) or E.OCD (deceleration), this trips during steady-state running.
Common Causes
- Sudden mechanical load increase (jam, binding, slug loading)
- Motor winding degradation causing higher current draw
- Incorrect motor parameters (P01.01 rated current set too low)
- V/Hz curve mismatch for the motor type
Recommended Fix
- Check the mechanical load — look for jammed product, seized bearings, or broken couplings.
- Clamp-meter the motor current and compare to the nameplate FLA.
- Verify P01.01 (motor rated current) matches the motor nameplate.
- If the load is legitimate, consider upsizing the drive or motor.
- Reset with the STOP/RESET key after clearing the mechanical issue.
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