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Fanuc Servo Alarm 749 - S–SPINDLE LSI ERROR

FANUC Alarm Codes >> FANUC Spindle Alarms >> Spindle Alarm 749

Description: It is serial communication error while system is executing after power supply on. Following reasons can be considered.

  1. Optical cable connection is fault or cable is not connected or cable is cut.
  2. MAIN CPU board or option 2 board is fault.
  3. Spindle amp. Printed board is fault.
  4. If this alarm occurs when CNC power supply is turned on or when this alarm cannot be cleared even if CNC is reset, turn off the power supply also turn off the power supply in spindle side.

Contact Tri Star CNC Services


Contact Tri Star CNC Services for troubleshooting, repairs & replacement

Give us a call and we’ll help you determine the source of the error and find a solutions ASAP. We offer FREE phone support, competitive repair pricing, or quick turnaround on a replacement from our exchange stock if necessary. If you need on-site support we can point you in the right direction.

Parts & repair warranty information

Exchange parts and repaired parts include a 1-year warranty. Tri Star CNC, LLC warrants the COMPLETE ASSEMBLY REPAIR – not just the parts and labor.

Get more details on our warranty and please contact us for further support.

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