Troubleshooting steps
Check emergency stop buttons, verify safety interlocks, test safety relay
Robot Error Codes
FANUC ALARM 31 – Safety circuit fault
Safety circuit fault
Details
FANUC ALARM 31 error on R-30iA, R-30iB indicates safety circuit fault. Emergency stop activated, safety interlock open, safety relay fault. Check emergency stop buttons, verify safety interlocks, test safety relay.
Error typesafety
MeaningSafety circuit fault
Typical causesEmergency stop activated, safety interlock open, safety relay fault
SolutionsCheck emergency stop buttons, verify safety interlocks, test safety relay
SeverityCritical
Catalog references
Where this appears
FANUCALARM 31
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What does ALARM 31 mean on FANUC robot?
ALARM 31 on FANUC R-30iA, R-30iB indicates safety circuit fault. Emergency stop activated, safety interlock open, safety relay fault.
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