Fanuc Parts Specialists

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Fanuc Alarm A (External Fan Failure)

Fanuc ALPHA i series power supply module presenting as Fanuc alarm A. Indicating a failure or problem with the external fan attached to the radiator or heatsink section of the drive.

This alarm can present on 6110, 6115, 6120, 6140, 6150, 6152, 6200, 6250 power module from the ai series.

Accompanying system alarms are DS0611 will force the machine into error condition and stop the drives from functioning beyond referencing. On other types of control systems SP9113 may appear with alarm A or alarm 10.

Alarm A should be present on PS (power supply module) and possible on other amps status displays in the electrical cabinet.

Fault Finding alarm A or 10 on PS.

  • Objects or dirt/contamination blocking the fan
    • Check for foreign objects stopping the fan or clean off the fan if crud present (could be a free fix).
  • Reseat connections:
    • Bad Fan connection
    • Reseat the control pcb
  • Replace the fan
    • Part number starts with A90L-0001-0xxx#x or will have a NBT-MAT, SanAce WF series.
  • None of the above replace drive

NOTE: Please make sure its a competent individual that has requisite training, knowledge, skills to work on powered CNC machine tool. Or contact your local CNC service engineer to inspect the Fanuc ALARM A or 10.

Click this link if you have Alarm 2 presented on the power supply module.

Fanuc Parts Specialist:

If your Fanuc control system alarms then we can help by assisting you with diagnosis and the supply of parts or repair of drives, motors and control system boards. Further we can build cables on order if required.

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