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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.

dCE2

Communication Error2

Yaskawa · GA500 Maintenance and Troubleshooting

What does dCE2 mean?

Similar to dCE1, this communication error points to a temporary drive hardware issue primarily caused by electrical noise. This can lead to unreliable drive performance, erratic operation, and potential system downtime.

Common Causes

  • Transient voltage spikes or surges on the control power supply (e.g., 24VDC) disrupting internal logic.
  • Failure of optical isolators or galvanic isolation barriers used in internal communication paths.
  • Inadequate shielding of internal communication traces on the PCB, making them susceptible to crosstalk.
  • Software timeout in an internal communication protocol due to excessive processing load or unexpected delays.
  • Corrosion or oxidation on critical internal board-to-board connector pins, causing high resistance.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Reset the drive (e.g., by cycling the control power via terminal S1/SC or equivalent) and check status.

  2. 2

    2. Check the integrity of the main earth connection from the drive to the central grounding point.

  3. 3

    3. Inspect for loose internal components or boards that may be vibrating and causing intermittent connections.

  4. 4

    4. Review the ambient environment for strong electromagnetic fields or radio frequency interference (RFI) sources.

  5. 5

    5. Replace any suspect internal ribbon cables or small interconnection wires that appear stressed or damaged.

  6. 6

    6. If the drive is equipped with a fan, verify its operation and ensure proper airflow over internal components.

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

Related Faults

CECommunication Data ErrorCFControl FaultCP1Comparator 1 Limit Error
Source: Yaskawa GA500 Maintenance and Troubleshooting
View Official PDFSearch more codes in this manual