CPF38

Control Circuit Error

Yaskawa · Drive Fault Codes

What does CPF38 mean?

A control circuit error indicating a malfunction within the drive's internal control logic or hardware. This fault often points to damaged internal components that necessitate power cycling and replacement of the affected hardware.

Common Causes

  • Internal hardware malfunction on the control board due to component failure
  • Transient electrical noise or severe disturbance affecting the control circuit's operation
  • Degradation or failure of internal electronic components over time.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Perform a power cycle by disconnecting and reapplying input power to the drive completely.

  2. 2

    Visually inspect the control board for signs of damage or burn marks on components.

  3. 3

    If the fault persists, replacement of the drive control board or the entire drive unit may be necessary.

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

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