Parameter Storage Device Fault (Control Circuit Board)

What does E.PE mean?

A fault has occurred in the inverter's parameter storage (EEPROM failure) on the control circuit board, causing the inverter output to shut off. This often results from an excessively high number of write operations to the EEPROM, leading to degradation. This fault indicates a potential hardware degradation that can affect parameter retention.

• Degradation of the EEPROM memory on the control board due to exceeding its maximum specified write cycles.
• Voltage spikes or power supply instability affecting the EEPROM's integrity during write operations.
• Electromagnetic interference (EMI) causing data corruption in the EEPROM.
• Physical damage or manufacturing defect in the EEPROM chip or its supporting circuitry.
• Firmware bug leading to excessive or erroneous write operations to the EEPROM.

Click steps to track your progress.

1. 1

   1. Attempt a factory reset (e.g., Pr.77 set to 1) to reinitialize the EEPROM and then manually re-enter necessary parameters.

2. 2

   2. Verify incoming AC line voltage stability (expected: within +/-10% of rated voltage) and check inverter grounding.

3. 3

   3. If the fault reoccurs, avoid frequent parameter changes or data logging if possible, and monitor the fault frequency.

4. 4

   4. Check for any visible signs of damage or discoloration on the control circuit board components near the EEPROM chip.

5. 5

   5. If a parameter backup is available, try restoring parameters; if restoration fails, the EEPROM is likely damaged and requires replacement of the control board.