Fanuc Alarm, Error Code for faults within Fanuc hardware, software or illegal program/machining operation alarms. Listed below is common Fanuc alarm codes, errors or illegal function or operation which forces your CNC machine tool too fault.
CNC SYSTEM ALARM:
System alarms are presented on the screen / display of the control system. Covering Fanuc CNC controls from system Zero, 6, 10, 11, 15, 16 18, 21 onto later 16i/18i/21i controls. Fanuc alarm errors listed on the display cover direct system alarms, drive alarms, communication alarms and notification alarms.
- System related: 701, 910, 911, 914, 920, 930, 97x.
- 701 – System Fan Fault
- 910 / 911 – Ram Parity Low or Low
- 914 – Servo Parity Alarm
- 920 – Servo Alarm
- 930 – CPU error Alrm
- 97x – NMI interupt alarm (Mask).
- 998 – ROM Alarm
- Drive related: 401, 408, 409, 410, 4n4, 4×8, 449.
- 401 – VRDY off
- 408 – No spindle communication
- 409 – Spindle disconnection alarm
- 4n0 – Encoder detection alarm
- 4n4 – Servo detection alarm
- 438 – INV. Abnormal Current
- 4n9 – INV. IPM alarm
- FSSB alarms: 5136.
- Serial comms related: 351.
- PMC issues: 604.
- Overtravel Alarms: 500.
- Fanuc BAT Alarm.
LED / 7 Segment display lit on main boards (red and green).
- Seven segment : SYSTEM 10/11 Masterboard alarms
- LED on master and main cpu.
DRIVE / AMPLIFIER / INVERTER ALARM:
Fanuc alarm codes listed on drives are displayed either on the single or twin 7 segment display or via LED on the control board.
- Servo Amplifier Alarms:
- 1 / F – Fan Fault
- 2 – Control Power Supply Undervoltage
- 5 – DC Link under Voltage
- 8 / 9 / A, b, c, d. – Abnormal Current / High Current / Short Circuit
- 8. / 9. / A. – n’th Axis: Inverter IPM alarm
- U / L – Inverter: Loss of FSSB Communication.
- Spindle Amplifier Alarms:
- 2 – Velocity Error Excess.
- 11 – PS Over Volt. DC Link ¦ See AL. 7 on PSM / aiPS power supply.
- 12 – Over Current / High Current / Abnormal Current / Short Circuit
- 19 / 20 – Current Detection Alarm.
- 24 – No Spindle Communication with CNC.
- 30 – PS Overcurrent ¦ See AL. 1 on PSM / aiPS power supply.
- 31 – Motor Lock – Not rotating at specified Speed.
- 33 – PS Pre-Charge Failure ¦ See AL. 5 on PSM / aiPS power supply.
- 51 – PS Low Volt. DC Link ¦ See AL. 4 on PSM / aiPS power supply.
- 56 / 88 – Colling Fan Failure
- Power Module Alarms:
- 1 – Overcurrent Flowed into input of the main circuit.
- 2 – Internal Fan Fault (SV0443)
- 4 – Low Voltage on DC Link
- 5 – Pre-Charge Circuit Failure
- 7 – Over Voltage on DC Link
- 10 / A – PS External Fan Failure (SP9113) aiPS2~aiPS100HV
- Servo Unit & Axis:
- HC – High Current
- HV – High Voltage
- LV – Low Voltage
- DC – Regen Alarm
- VRDY – Velocity Ready ON/OFF
LED’s lit on various BETA servo units.
P/S errors / alarms:
- PS85 – Communication Error (RS232)
- PS86 – DR Signal OFF (RS232)
- PS101 – Please Clear Memory
Currently at DNC we have thousands of Fanuc manuals for operation, maintenance, programming and more. For further more expansive information contact us or call you local CNC service engineer.
Fanuc Parts Specialist:
If your Fanuc control system alarms then we can help by assisting you with diagnosis and the supply of parts or repair of drives, motors and control system boards. Further we can build cables on order if required.
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