Internal fault (Power EEPROM data defective or too old)

What does 257 mean?

The power EEPROM data is defective or too old. This indicates a corruption or obsolescence of the non-volatile memory storing power section parameters.

• Corruption of data stored in the power section's EEPROM (Electrically Erasable Programmable Read-Only Memory) due to noise or power fluctuation.
• Degradation or wear-out of the EEPROM memory cells over time due to exceeding specified write/erase cycles.
• Incompatibility between a new firmware version and the existing data format in the power EEPROM.
• Internal communication error between the main CPU and the power EEPROM chip, leading to data access issues.
• Manufacturing defect in the EEPROM chip itself or its associated circuitry on the power board.

Click steps to track your progress.

1. 1

   1. Back up all parameters from the frequency converter (if accessible via control panel or software).

2. 2

   2. Perform a factory reset (e.g., Parameter P14-22 Load defaults) to clear corrupted EEPROM data.

3. 3

   3. Download the backed-up parameters to the frequency converter after the factory reset.

4. 4

   4. Power cycle the frequency converter (main input power off for 5 minutes) and observe if the fault clears.

5. 5

   5. Verify the frequency converter's firmware version is up-to-date and compatible with any recent changes or system updates.