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Overheat Alarm Codes

FANUC Overheat Alarm Codes List

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CNC machine errors bring production to a halt, throw alarms, and leave you in the dark. Consult the list below and shed some light.

Tri Star CNC Services offers troubleshooting support to help you get your equipment fixed and back into production. We offer a fault diagnosis and a 1-year warranty on all replacement or repairs.

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FANUC Overheat Alarm Codes

Alarm CodeMessageDescription
700 OVERHEAT: CONTROL UNIT Control unit overheat
Check that the fan motor operates normally, and clean the air filter.
701 OVERHEAT: FAN MOTOR The fan motor on the top of the cabinet for the control unit is overheated.
Check the operation of the fan motor and replace the motor if necessary.
704 OVERHEAT: SPINDLE Spindle overheat in the spindle fluctuation detection
(1) If the cutting load is heavy, relieve the cutting condition.
(2) Check whether the cutting tool is share.
(3) Another possible cause is a faulty spindle amp.


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