Troubleshooting steps
Check servo amplifier, verify motor load, inspect encoder
Robot Error Codes
FANUC ALARM 138 – Servo motor fault
Servo motor fault
Details
FANUC ALARM 138 error on R-30iA, R-30iB indicates servo motor fault. Servo amplifier fault, motor overload, encoder problem. Check servo amplifier, verify motor load, inspect encoder.
Error typeservo
MeaningServo motor fault
Typical causesServo amplifier fault, motor overload, encoder problem
SolutionsCheck servo amplifier, verify motor load, inspect encoder
SeverityHigh
Catalog references
Where this appears
FANUCALARM 138
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What does ALARM 138 mean on FANUC robot?
ALARM 138 on FANUC R-30iA, R-30iB indicates servo motor fault. Servo amplifier fault, motor overload, encoder problem.
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