Fanuc alarm codes
428 alarms documented. Each entry explains the code, likely causes and the replacement part that resolves it.
αi/βi Servo (SV0xxx)
- SV0404IMPROPER V_READY ON
- SV0409DETECT ABNORMAL TORQUE
- SV0410EXCESS ERROR (STOP)
- SV0411EXCESS ERROR (MOVING)
- SV0413LSI OVERFLOW
- SV0415MOTION VALUE OVERFLOW
- SV0417ILL DGTL SERVO PARAMETER
- SV0420SYNC TORQUE EXCESS
- SV0421EXCESS ERROR (SEMI-FULL)
- SV0430Servo motor overheat - motor internal thermostat operated.
- SV0434INV. LOW VOLT CONTROL
- SV0435INV. LOW VOLT DC LINK
- SV0437Converter: input circuit overcurrent reported through CNC.
- SV0438Inverter: abnormal motor current alarm (axis identified by amplifier LED detail).
- SV0441Current offset error - offset value of the current detector (equivalent to emergency-stop current) abnormally high.
- SV0442Converter: DC link precharge failure reported through CNC.
- SV0444INV. COOLING FAN FAILURE
- SV0445Soft disconnection alarm - pulse coder feedback dropped out dynamically (detected via pulse count mismatch).
- SV0446HARD DISCONNECT ALARM
- SV0447HARD DISCONNECT (EXT)
- SV0448UNMATCHED FEEDBACK ALARM
- SV0449Inverter: IPM alarm - intelligent power module latched an overcurrent/short event.
- SV0453SPC SOFT DISCONNECT ALARM
- SV0454ILLEGAL ROTOR POS DETECT
- SV0456ILLEGAL CURRENT LOOP
- SV0458CURRENT LOOP ERROR
- SV0462SEND CNC DATA FAILED
- SV0463SEND SLAVE DATA FAILED
- SV0465READ ID DATA FAILED
- SV0466MOTOR/AMP. COMBINATION
- SV0468HI HRV SETTING ERROR (AMP)
- SV0600INV. DC LINK OVER CURRENT
- SV0601Inverter: cooling fan stopped of the radiator (hard alarm following DS0609 warning state).
- SV0602INV. OVERHEAT
- SV0603Inverter: IPM alarm (overheat) - IPM thermal protection latched.
- SV0604AMP. COMMUNICATION ERROR
- SV0605CNV. EX. DISCHARGE POW.
- SV0607Open phase detected in the converter main power supply.
0i-D servo alarm (motor protection)
βi SVU/SVM
0i-D servo alarm (power circuit)
0i-D servo alarm (load)
0i-D servo alarm (cooling)
0i-D servo alarm (power module)
0i-D servo alarm (FSSB)
safety/dual-check alarm
- SV0470n AXIS:ILLEGAL RAM (MNT)
- SV0471n AXIS:SPC SOFT DISCONNECT (MNT)
- SV0474n AXIS:EXCESS ERROR (STOP:MNT)
- SV0475n AXIS:EXCESS ERROR (MOVING:MNT)
- SV0480n AXIS:ILLEGAL SAFETY MODE (MNT)
- SV0487ILLEGAL SAFETY MODE (CNC)
- SV0488SAFE TEST OVER TIME
- SV0489SAFETY PARAM ERROR (CNC)
- SV0490CNC SAFETY FUNCTION ERROR
- SV0491LOCAL BUS TEST ERROR
- SV0492F-BUS TEST ERROR
- SV0493SAFETY DO SIGNAL ERROR (CNC)
- SV0494n AXIS:SAFETY SPEED EXCEEDED (CNC)