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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.

84

Thermal overload of motor

SEW Eurodrive · MOVIFIT-FC Inverter

What does 84 mean?

The motor has experienced thermal overload. This can be caused by high ambient temperature, inadequate heat dissipation around the motor, or excessive mechanical load on the motor, leading to its operating temperature exceeding safe limits.

Common Causes

  • Motor winding temperature exceeds safe operating limit.
  • Overcurrent condition detected, leading to thermal trip.
  • Insufficient cooling of the motor.
  • Incorrect motor load or duty cycle.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Lower the ambient temperature around the motor.

  2. 2

    Ensure proper airflow and ventilation to prevent heat build-up around the motor.

  3. 3

    Reduce the mechanical load on the motor.

  4. 4

    Increase the motor speed if the application allows.

  5. 5

    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