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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

CPF06

EEPROM Memory Data Error

Yaskawa · Drive Fault Codes

What does CPF06 mean?

An error detected in the drive's EEPROM (Electrically Erasable Programmable Read-Only Memory), where parameters and operational data are stored. This can indicate data corruption or a faulty memory chip, potentially causing the drive to operate with incorrect settings or fail to store new ones.

Common Causes

  • Corruption of data in the EEPROM due to power fluctuations or severe electrical noise
  • Faulty EEPROM chip on the control board reaching end-of-life or experiencing failure
  • Firmware update interruption or failure causing inconsistent data storage.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Perform a parameter initialization (e.g., using parameter A1-03 for a factory reset) and re-enter all parameters manually.

  2. 2

    Cycle power to the drive to attempt a memory refresh and clear any transient memory errors.

  3. 3

    If the fault persists after re-entering parameters, the control board containing the EEPROM may need replacement.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

CEMEMOBUS/Modbus Communication ErrorCPF02A/D Conversion ErrorCPF03Control Board Connection Error
Source: Yaskawa Drive Fault Codes
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