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ErrorLib — Industrial Fault Code Library

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81

Start condition error

SEW Eurodrive · MOVIMOT MM..D With AC Motor DRS

What does 81 mean?

The motor could not be supplied with the correct amount of current during its pre-magnetizing time, preventing a proper start-up sequence. This often points to a mismatch between inverter and motor ratings or issues with cabling.

Common Causes

  • Rated motor power is too small compared to the rated inverter power
  • Motor cable cross section is too small, impeding current delivery

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the connection between the MOVIMOT® inverter and motor for proper sizing and cable integrity

  2. 2

    Verify the rated motor power is appropriately matched with the rated inverter power

  3. 3

    Reset the error by switching off the DC 24 V supply voltage

  4. 4

    Reset the error via the control system or dedicated reset function

Browse all codes in this manual (16)
Verified technical data. Last updated: April 2026

Related Faults

01Overcurrent in output stage06Phase failure07DC link voltage too high
Source: SEW Eurodrive MOVIMOT MM..D With AC Motor DRS
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