Welcome to Parts Provider’s FANUC Spindle Alarm Codes page. Our comprehensive FANUC spindle alarm list is designed to help you quickly diagnose and address any issues with your machinery. Browse our detailed FANUC alarm codes and FANUC error codes to find specific problems and their solutions. Each entry in our FANUC alarm list includes a thorough explanation to guide you through troubleshooting and repairs. With Parts Provider, you have a reliable resource for all your FANUC spindle alarm needs, ensuring your equipment runs smoothly and efficiently. Trust us for expert support and accurate information.
FANUC Technical Support & Troubleshooting Spindle Alarm Codes
FANUC Spindle Alarm Codes (AL-A through AL-20)
Alarm A (AL-A) ROM Abnormality
Cause: Incorrect ROM, ROM not installed correctly, error with control circuit.
Remedy: Install correct ROM, replace control circuit.
Alarm 01 (AL-01) Motor Overheat
Causes: Damaged motor fan, overload, motor cooler is dirty, loose connection.
Remedy: Replace parts, clean cooler, check connections, review cutting conditions.
Alarm 02 (AL-02) Excessive Speed Deviation
Causes: Overload, transistor module is damaged, loose connections, error with speed feedback signal, blown fuse.
Remedy: Replace parts, check connections, review cutting conditions.
Alarm 03 (AL-03) Blown Fuse in DC Link Section
Causes: Indicates that the fuse F4 in DC link is blown (models 30S and 40S).
Remedy: Check power transistors and replace fuse.
Alarm 04 (AL-04) Input fuse blown / Input power open phase
Causes: Defective transistor module, blown fuse.
Remedy: Replace parts, replace fuse.
Alarm 05 (AL-05) Control Power Supply Fuse Blown
Causes: Defective PCB, Abnormal power supply voltage.
Remedy: Check power supply, replace PCB, replace fuse.
Alarm 07 (AL-07) Excessive Speed
Causes: Incorrect parameter setting.
Remedy: Reset parameter value.
Alarm 08 (AL-08) High Input Voltage
Causes: AC power supply too high, incorrect setting of toggle switch for voltage setting.
Remedy: Change setting from 200V to 230V.
Alarm 09 (AL-09) Heat sink is overheated
Causes: Cooling fan is defective, overload, dust and dirty.
Remedy: Replace fan, review cutting conditions, clean parts.
Alarm 10 (AL-10) Input Power Voltage Low
Causes: Drop in input power, momentary power failure.
Remedy: Correct case and reset alarm.
Alarm 11 (AL-11) Overvoltage of DC Link Circuit
Causes: High power impedance, PCB or transistor module are defective.
Remedy: Check AC power, replace damaged parts.
Alarm 12 (AL-12) Overcurrent flows to DC Link Circuit
Causes: Output terminals or internal motor of motor is shorted, defective PCB or transistor module.
Remedy: Check connections, replace damaged parts.
Alarm 13 (AL-13) CPU Inter Data Memory Alarm
Cause: Defective PCB
Remedy: Replace PCB
Alarm 15 (AL-15)
Cause: Spindle switch /output switch alarm.
Remedy: Check sequence.
Alarm 16 (AL-16) RAM Abnormality
Causes: Defective RAM or PCB.
Remedy: Replace RAM, replace PCB.
Alarm 18 (AL-18) Program ROM sum check error
Causes: Defective ROM.
Remedy: Replace ROM.
Alarm 19 (AL-19)
Causes: Defective A/D convertor or PCB, loose connections.
Remedy: Replace A/D convertor, replace PCB, check connections.
Alarm 20 (AL-20)
Causes: Defective PCB, loose connections.
Remedy: Replace PCB, check connections.
FANUC Spindle Alarm Codes (AL-24 through AL-49)
Alarm 24 (AL-24)
Causes: CNC power off, defective optical cable.
Remedy: Turn power on, clean or replace optical cable, replace LSI, replace PCB.
Alarm 25 (AL-25)
Cause: See Alarm 24
Remedy: See Alarm 24
Alarm 26 (AL-26)
Cause: Defective signal level/line of spindle motor for C axis control, defective detector circuit for C axis control, incorrect parameter setting.
Remedy: Check signal level, connect signal cable securely, replace detector circuit, set correct parameter value.
Alarm 27 (AL-27)
Causes: Position coder signal line defective, incorrect parameter setting.
Remedy: Connect signal cable securely, replace signal cable, set correct parameter values.
Alarm 28 (AL-28)Cause: Defective signal level/line of spindle motor for C axis control, defective detector circuit for C axis control.
Remedy: Check signal level, connect signal cable securely, replace detector circuit.
Alarm 29 (AL-29)
Cause: Overload.
Remedy: Review cutting conditions.
Alarm 30 (AL-30)
Cause: Defective power transistor, defective PCB.
Remedy: Replace power transistor, replace PCB.
Alarm 31 (AL-31)
Cause: Motor constrained, defective motor speed reversion signal/signal cable
Remedy: Connect cable securely, replace cable.
Alarm 32 (AL-32)
Cause: Defective LSI.
Remedy: Replace LSI, replace PCB.
Alarm 33 (AL-33)
Cause: Defective relay, disconnected resistor.
Remedy: Replace amp.
Alarm 34 (AL-34)
Cause: Incorrect parameter setting
Remedy: Set correct parameter values.
Alarm 35 (AL-35)
Cause: Incorrect parameter setting for gear ratio and position gain data.
Remedy: Set correct parameter values.
Alarm 36 (AL-36)
Cause: Error count overflow
Remedy: Correct cause and reset the alarm.
Alarm 37 (AL-37)
Cause: Incorrect parameter setting (No.6511)
Remedy: Set correct parameter values.
Alarm 39 (AL-39)
Cause: Incorrect ROM version.
Remedy: Replace ROM version.
Alarm 40 (AL-40)
Cause: No occurrence of 1-rotation signal.
Remedy: Make 1-rotation signal offset adjustment, check cables.
Alarm 41 (AL-41)
Cause: Incorrect parameter setting (No. 6503), incorrect amplitude and offset of position coder feedback signal.
Remedy: Set correct parameter value, adjust feedback signal, check shielding status.
Alarm 42 (AL-42)
Cause: Position coder 1-rotation signal not detected.
Remedy: Make 1-rotation signal adjustment for signal conversion circuit.
Alarm 43 (AL-43)
Cause: Disconnection of position coder signal for differential speed mode.
Remedy: Check main spindle position coder signal is connected to connector CN12
Alarm 46 (AL-46)
Cause: Failure in detecting position coder 1-rotation signal in thread operation.
Remedy: Make 1-rotation signal adjustment for signal conversion circuit. Check cable shield status.
Alarm 47 (AL-47)
Cause: See Alarm 41
Remedy: See Alarm 41
Alarm 48 (AL-48)
Cause: The position coder 1-rotation speed is too high
Remedy: Make 1-rotation signal adjustment for signal conversion circuit
Alarm 49 (AL-49)
Cause: The converted differential speed is too high
Remedy: Calculate differential speed and check if this value is not greater than the maximum speed of the motor.
FANUC Spindle Alarm Codes (AL-50 through AL-55)
Alarm 50 (AL-50)
Cause: Excessive speed command calculation value in spindle synchronization control.
Remedy: Calculate motor speed and check if it is not greater than max motor speed
Alarm 51 (AL-51)
Cause: Undervoltage at DC link section.
Remedy: Correct cause and reset the alarm.
Alarm 52 (AL-52)
Cause: ITP signal abnormality I.
Remedy: Correct cause and reset the alarm.
Alarm 53 (AL-53)
Cause: ITP signal abnormality II.
Remedy: Correct cause and reset the alarm.
Alarm 54 (AL-54)
Cause: Overload current alarm
Remedy: Check if overload operation or frequent acceleration/deceleration is performed.
Alarm 55 (AL-55)
Cause: Power line abnormality in spindle switching/output switching.
Remedy: Check magnetic contractor for power line switching.
Contact FANUC Parts Provider for more information or for a quote on FANUC spare parts or FANUC repair services.
