KUKA Robot codes
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KUKA Robot Controller

System · Basic

Alarm KRC0371

KUKA Robot KRC0371 - Ackn. PC fan error

This acknowledgment alarm indicates that the PC fan speed in the KUKA KRC controller had dropped below the minimum threshold for safe thermal management, but has since recovered to normal operating speed. This alarm is informational and confirms the system has returned to a healthy thermal state after a temporary fan speed degradation event.

KUKA RobotSystemBasic

KRC0371

KUKA Robot KRC0371 - Ackn. PC fan error

Ackn. PC fan error

This acknowledgment alarm indicates that the PC fan speed in the KUKA KRC controller had dropped below the minimum threshold for safe thermal management, but has since recovered to normal operating speed. This alarm is informational and confirms the system has returned to a healthy thermal state after a temporary fan speed degradation event.

Common Causes

  • Dust accumulation on fan blades or intake/exhaust vents reducing airflow efficiency
  • Fan bearing wear or mechanical degradation causing reduced RPM
  • Loose fan mounting or vibration causing intermittent contact issues
  • Inadequate ambient temperature or blocked cooling vents in the control cabinet
  • Temporary voltage fluctuation or power supply issue affecting fan motor performance

Troubleshooting Steps

  1. 1Verify the alarm has been acknowledged and the controller is operating normally at current thermal conditions
  2. 2Inspect the PC fan visually for dust buildup, debris, or visible damage and clean as necessary using compressed air
  3. 3Check that the control cabinet cooling vents are unobstructed and ambient temperature is within specified operating range (typically 5-45°C)
  4. 4Verify all fan power connectors are properly seated and secured with no loose contacts or corrosion
  5. 5Monitor system temperatures using the KUKA smartHMI interface to ensure thermal values remain stable and within normal ranges
  6. 6If the alarm recurs frequently, schedule fan replacement during preventive maintenance or consider cabinet ventilation improvements

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