ST500 | Err.01, what does this message mean and what can be done?

If the error message Err.01 appears on the frequency inverter’s display, it indicates a self-protection function of the inverter.

Causes:

  • Short circuit at the inverter’s output
  • Motor cable is too long
  • Inverter overheating
  • Wiring error
  • Faulty control panel of the inverter
  • Faulty control indicator
  • Defective IGBT modules of the inverter

Solutions:

  • Check the inverter’s wiring, motor wiring, and sensors
  • If the cable is longer than 20 meters, install motor filters and/or motor chokes
  • Check the inverter’s ventilation and ensure sufficient spacing (see manual)
  • Inspect the inverter’s fans, clean or replace them if necessary
  • If none of these issues apply, please contact technical support
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