Fault code

Inovance MD280 Err40 Fast current limit timeout

Diagnostic context

What Err40 means on Inovance MD280

Err40 is the MD280 fast current limit timeout. The manufacturer lists the acceleration/deceleration time is too short. as one of the documented causes.

Operating context: Start with the manufacturer troubleshooting sequence. Increase the acceleration/deceleration time. Adjust the manual torque boost or V/F curve.

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

Possible causes

  • The acceleration/deceleration time is too short.
  • Manual torque boost or V/F curve is not appropriate.
  • The startup operation is performed on the rotating motor.
  • The load is too heavy.

Recommended checks and actions

  • Increase the acceleration/deceleration time.
  • Adjust the manual torque boost or V/F curve.
  • Use rotational speed tracking startup or perform startup after the motor stops.
  • Use an AC drive of a higher power class.

Technical source

Inovance MD280 User Manual EN - Err40 troubleshooting — page 162