EEr Message No. 0091

Parameter & program

EEPROM error

What does it mean?

Fault while reading / writing the internal EEPROM.

Common causes

  • Internal EEPROM fault — often after a sudden power loss or ageing EEPROM.

How to fix it

  • Restore the parameter set (C0003 = 1)
  • if it recurs, the drive needs a workshop inspection — send it to us.

After troubleshooting: de-energise the device completely (disconnect the 24 V supply and discharge the DC bus) before opening the covers.

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