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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

90

Output stage detection

SEW Eurodrive · MOVIFIT-FC Inverter

What does 90 mean?

This fault indicates an incorrect assignment between the motor and the inverter, or an invalid DIP switch setting. The unit cannot properly detect or configure its output stage, preventing correct motor control.

Common Causes

  • Output stage fault detected (e.g., short circuit, open circuit).
  • Overcurrent or overvoltage on the output.
  • Over-temperature of the output semiconductor device.
  • Feedback from output stage indicates abnormal condition.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Correct the DIP switch settings on the unit according to the motor/inverter combination.

  2. 2

    Reset the fault by switching off the DC 24 V supply voltage.

Browse all codes in this manual (26)
Verified technical data. Last updated: April 2026

Related Faults

01Overcurrent in output stage04Thermal overload of motor / Overcurrent in brake chopper06Phase failure
Source: SEW Eurodrive MOVIFIT-FC Inverter
Open Manual (Page 127)Search more codes in this manual