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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.

CPF23

Control Board Connection Error

Yaskawa · Drive Fault Codes

What does CPF23 mean?

An issue with the physical connection of the main control board, similar to CPF03, implying a critical link between central processing and other drive sections is compromised. This impacts the overall drive functionality and can lead to operational failures.

Common Causes

  • Loose main control board connection due to excessive vibration or improper installation
  • Corroded or bent pins on the control board's main connector or its mating socket
  • Internal wiring or ribbon cable damage between control board sections.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Power down the drive and carefully reseat the control board, ensuring all connectors are firm.

  2. 2

    Inspect the control board's edge connectors and mating slots for cleanliness and physical damage.

  3. 3

    Verify that all internal ribbon cables connecting to the control board are properly seated and undamaged.

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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