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ErrorLib — Industrial Fault Code Library

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SP9074

CPU TEST ERROR

Fanuc · Alpha i Series Servo Amplifier

What does SP9074 mean?

An error occurred in a spindle amplifier CPU test. This indicates a hardware fault within the spindle amplifier's central processing unit, requiring replacement of the SPM control board.

Common Causes

  • Internal CPU self-test routine encountered an error.
  • CPU processing unit has a hardware malfunction.
  • Overheating of the CPU affecting its performance.
  • Critical software exception during CPU operation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the SPM control printed-circuit board.

Browse all codes in this manual (101)
Verified technical data. Last updated: April 2026

Related Faults

0233Velocity Pulse Count Exceeded0243Position Pulse Count Exceeded0434Velocity Loop Integral Gain Overflow
Source: Fanuc Alpha i Series Servo Amplifier
Open Manual (Page 126)Search more codes in this manual