Fault code

Inovance MD280 Err04 Overcurrent at constant speed

Diagnostic context

What Err04 means on Inovance MD280

Err04 is the MD280 overcurrent at constant speed. The manufacturer lists the output circuit is grounded or short circuited. as one of the documented causes.

Operating context: Start with the manufacturer troubleshooting sequence. Eliminate external faults. Remove the added load.

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

Possible causes

  • The output circuit is grounded or short circuited.
  • A sudden load is added during operation.
  • The AC drive model is of too small power class.

Recommended checks and actions

  • Eliminate external faults.
  • Remove the added load.
  • Select an AC drive of higher power class.

Technical source

Inovance MD280 User Manual EN - Err04 troubleshooting — page 159

Inovance MD280 troubleshooting VI - Err04 — page 8