Fault code

INVT GD270 OC1 Overcurrent during ACC

Diagnostic context

What OC1 means on INVT GD270

OC1 identifies an overcurrent condition while the GD270 is accelerating the motor. The manufacturer troubleshooting entries focus on acceleration/deceleration time, input power, drive sizing, load condition, output wiring and external interference.

Operating context: The fault is associated with the acceleration phase, so checks should begin with conditions present while motor speed is increasing.

This diagnostic context is an editorial explanation. The possible causes and recommended checks below are the verified manufacturer troubleshooting content.

Possible causes

  • ACC/DEC too fast.
  • Grid voltage too low.
  • VFD power too small.
  • Load transient or exception occurred.
  • To-ground short circuit or output phase loss occurred.
  • Strong external interference sources.
  • The overcurrent stall protection is not enabled.

Recommended checks and actions

  • Increase ACC/DEC time.
  • Check the input power.
  • Select a VFD with larger power.
  • Check whether the load is short circuited (to-ground short circuit or line-to-line short circuit) or the rotation is not smooth.
  • Check the output wiring.
  • Check whether there is strong interference.
  • Check the settings of related function codes.

Technical source

INVT GD270 Manual EN - Fault OC1 — page 277