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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.

CPF22

Communication Option Card Code Number Fault

Yaskawa · E7 Drive

What does CPF22 mean?

An unrecognizable option board is connected to the control board, indicating a type mismatch or an unsupported option card. This prevents the drive from correctly interfacing with the option card, leading to functional limitations or failure.

Common Causes

  • An incorrect or incompatible communication option card inserted into the drive's option slot.
  • The drive's main control board firmware version is too old to recognize a newer option card.
  • The option card is damaged internally, preventing its correct identification code from being read.
  • Poor electrical connection between the option card and the main control board, preventing proper ID recognition.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Power down the drive, remove the option card, and verify its part number against the drive's compatibility list in the manual.

  2. 2

    2. Inspect the option card connector and the drive's slot for bent pins or debris; clean and re-seat the card firmly.

  3. 3

    3. Check the drive's main control board firmware version and compare it with the option card's compatibility requirements.

  4. 4

    4. Try a known-good, compatible option card to confirm the issue is with the existing card or the drive's slot.

  5. 5

    5. If the card is confirmed incompatible, replace it with the correct model specified for the drive.

Browse all codes in this manual (64)
Verified technical data. Last updated: April 2026

Related Faults

BUSOption Communication ErrorCALLSI-F/G ComCallCEModbus Communication Error
Source: Yaskawa E7 Drive
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