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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.

26

External terminal

SEW Eurodrive · MOVIFIT-FC Inverter

What does 26 mean?

A low signal was detected on the external terminal that has been programmed with the "/External fault" function. This condition is specific to SBUS slave units and indicates a problem with an external monitoring circuit.

Common Causes

  • External digital input fault or configuration error.
  • Unexpected signal on a designated external terminal.
  • Parameter P0700 (digital input assignment) misconfiguration.
  • External interlock signal failure.
  • Wiring issue with external control terminals.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the signal level at the specified external terminal.

  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