FANUC SRVO
FANUC SRVO Alarm Codes: The Complete List
SRVO alarms are FANUC servo and safety-system alarms. They cover emergency stops, servo amplifier faults, encoder battery and mastering issues, collision detection, brake and axis problems, and dual-channel safety-chain faults. The index below groups published SRVO pages by category so a technician can jump from a pendant code to the matching plain-language troubleshooting page.
Servo
SRVO-001Operator panel E-stopSRVO-002Teach pendant E-stopSRVO-003Deadman switch releasedSRVO-004Fence openSRVO-005Robot overtravelSRVO-006Hand brokenSRVO-007External emergency stopsSRVO-009Pneumatic pressure alarmSRVO-010Belt brokenSRVO-012Power failure recoverySRVO-014Fan motor abnormal, CPU STOPSRVO-015System over heatSRVO-018Brake abnormalSRVO-021SRDY offSRVO-022SRDY onSRVO-023Stop error excessSRVO-024Move error excessSRVO-025Motn dt overflowSRVO-028Compensation excessSRVO-030Brake on holdSRVO-031User servo alarmSRVO-043DCAL alarm (regenerative discharge)SRVO-044DCHVAL alarm (DC link overvoltage)SRVO-045HCAL alarm (overcurrent)SRVO-046OVC alarm (overcurrent RMS)SRVO-047LVAL alarm (low control voltage)SRVO-049OHAL1 alarm (amplifier overheat)SRVO-050Collision Detect alarmSRVO-062BZAL alarm (pulse coder battery zero)SRVO-063RCAL alarm (rotation counter abnormal)SRVO-066CSAL alarm (pulse coder checksum)SRVO-067OHAL2 alarm (pulse coder overheat)SRVO-068DTERR alarm (pulse coder no response)SRVO-069CRCERR alarm (pulse coder data corrupt)SRVO-070STBERR alarm (pulse coder framing error)SRVO-071SPHAL alarm (feedback speed excess)SRVO-072PMAL alarm (pulse coder fault)SRVO-073CMAL alarm (pulse coder noise/fault)SRVO-074LDAL alarm (pulse coder LED broken)SRVO-076Tip Stick DetectionSRVO-078Servo param updateSRVO-079Stroke exceeded during pressSRVO-105Door open or E.StopSRVO-213E-STOP Board FUSE2 blownSRVO-2146ch amplifier fuse blownSRVO-215Brake Unit fuse blownSRVO-230Chain 1 abnormalSRVO-231Chain 2 abnormalSRVO-370SVON1 status abnormalSRVO-371SVON2 status abnormalSRVO-378SFDI xx status abnormalSRVO-402DCS Cart. pos. limitSRVO-403DCS Cart. speed limitSRVO-404DCS Joint pos. limitSRVO-405DCS Joint speed limitSRVO-477Calibration data error (CLLB.CM)SRVO-481Invalid payload number