Parameter storage device fault (control circuit board)

What does E.PE mean?

This fault indicates an error with the inverter's internal parameter storage device (EEPROM) on the control circuit board. This can be caused by a corrupted memory block or by an excessive number of parameter write cycles, which can wear out the EEPROM. A corrupted EEPROM can lead to incorrect operation, loss of critical configuration data, or complete inverter malfunction.

• Data corruption within the inverter's EEPROM memory due to power fluctuations, EMI, or transient voltage spikes.
• Exceeding the specified write endurance cycles of the EEPROM, leading to wear-out and inability to store data reliably.
• Internal hardware malfunction of the EEPROM chip or its interface circuitry on the control board.
• Incorrect firmware update process or an interrupted update causing incomplete or corrupted parameter storage.
• Long-term exposure to harsh environmental conditions (temperature, humidity) affecting the control board components.

Click steps to track your progress.

1. 1

   Perform a parameter initialization (clear all parameters to factory defaults, e.g., Pr. 160 = 1 or Pr. 77 = 1) and then re-enter essential parameters carefully.

2. 2

   Power cycle the inverter completely (remove main power supply R/L1, S/L2, T/L3 for 5 minutes) to reset the control board and internal memory.

3. 3

   Back up all current parameter settings (if accessible) before attempting a reset, using a Parameter Unit or software tool.

4. 4

   Check the input power stability and grounding of the inverter to mitigate potential EMI or power fluctuations that could affect EEPROM integrity.

5. 5

   If the fault persists after initialization, consider replacing the control circuit board as the EEPROM or its associated hardware may be faulty.