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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.

F

Inverter: cooling fan stopped of the radiator

Fanuc · Series 30i/31i/32i-MODEL B Plus

What does F mean?

The cooling fan responsible for the inverter's radiator has stopped functioning. Possible causes include the fan not running, a defective fan motor connector or cable, or a failure within the Servo Amplifier. A non-operational radiator fan can lead to critical overheating.

Common Causes

  • Fan not running
  • Fan motor connector or cable defective
  • Servo Amplifier failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the radiator cooling fan for obstructions, debris, or physical damage.

  2. 2

    Verify the fan motor connector and cable for secure connection and electrical continuity.

  3. 3

    If the fan and its cabling are confirmed functional, replace the Servo Amplifier.

Browse all codes in this manual (38)
Verified technical data. Last updated: April 2026

Related Faults

1Inverter Internal Cooling Fan Stopped2Inverter Control Power Supply Undervoltage366PULSE MISS(INT)
Source: Fanuc Series 30i/31i/32i-MODEL B Plus
Open Manual (Page 92)Search more codes in this manual