SP0009

Main Circuit Overload / IPM Overheat

Fanuc · AC Spindle Motor Alpha i-Beta i Series Parameters

What does SP0009 mean?

The main circuit of the spindle amplifier is overloaded, or the IPM (Intelligent Power Module) has overheated. This indicates excessive current draw or insufficient cooling for the power module.

Common Causes

  • Motor is drawing excessive current due to overload or fault.
  • IPM (Intelligent Power Module) failure within the amplifier.
  • Inadequate heatsink cooling for the IPM.
  • Short circuit in motor phases or cabling.
  • Incorrect motor saturation or flux parameters configured.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Measure motor winding resistance (U, V, W) to ground and between phases.

  2. 2

    Check the heatsink temperature of the IPM module on the amplifier.

  3. 3

    Verify that parameter P1-01 (motor current rating) is set correctly.

  4. 4

    Inspect the motor power cables for insulation damage.

  5. 5

    Run a low-speed motor test to assess current draw.

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Verified technical data. Last updated: March 2026

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Source: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters