Fanuc 10
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This document provides alarm codes and descriptions for Fanuc 10/11 CNC systems and servo drives. It lists common alarm codes for the master board, servo drives, spindle drives, and overtravel sensors. For each alarm code, it describes the likely cause and recommended repairs. The alarms are organized by type, with sections for Fanuc 10/11 master board alarms, servo drive alarms, AC and digital spindle drive alarms, and overtravel alarms.
Fanuc 10
- 1. Website: http://www.repair-fanuc.com/ Fanuc 10/11 Master Board Alarm Codes CNC Diagnostic Fanuc 10/11 Master Board Alarm Codes LED Display Alarm Description Repair A. MDI connection failure Check fiber optic cable connection between control and MDI/CRT unit. Replace Master Board, MDI Pcb, or fiber optic cable, small power supply front panel. C. MDI Failure Connection Unit for operators panel or connecting cable is defective. F. Connection Failure of connection unit or I/O cards D1 - D3 Check fiber optic cable connections between these units. Replace Master PCB, connection unit, I/O board, Fiber optic cable Failed I/O module in I/O base unit. H. Connection Failure I/O Connection Unit 2 or its connecting cable defective. c. Transfer error through fiber optic cable Check Front Panel Power Supply, Replace Master PCB, MDI PCB, Connection Unit PCB, I/O Unit , Fiber Optic Cable J. PC or interface converter not functioning Check PC-ROM cassette, PC RAM Board, or interface converter is mounted on Master PCB. L. Waiting for PC ready Replace PC ROM, PC ROM Cassette or PC RAM Board.
- 2. b. RAM check error Replace Master PCB or ROM/RAM board 8 RAM Check Check Power Supply, Clear Memory and Reload parameters. Replace Master Board. d. Power Supply Ready Signal Replace Power Supply, Master PCB E. System Error Replace Master PCB,Rom PCB or NC Software ROM Wrong option parameters No message on CRT- Clear memory O. IPL Mode 1 Normal Operation 4 Bad ACP Replace ACP daughter board Fanuc 10/ 11 Alarm Codes CNC DIAGNOSTIC SV 000 Tachogenerator Disconnect M Series Servo - Check the connection to the motor - Remove wires from terminals 5,6,7,8 - measure between 5 and 7 or 6 and 8 should read a short. Check for tach feedback at check terminals CH2 and CH3. AC Servo - Check the connection to the motor - Remove wires from terminals 5,6,7 - measure between each of the wires, they should all read the approx same and should be low resistance SV 001 Motor Overload M Series Servo - Reset overload, Check the servo transformer thermostat AC Servo - Check the thermostat on the servo transformer and the heat fin SV 002 Velocity Unit Breaker Off M Series Servo - Turn off power and reset breaker Alarm message not displayed for
- 3. AC Servo SV 003 Excess Current in Servo M Series Servo - Disconnect servo motor and check for short to ground. Check for short circuit on transistors. Bad servo drive board AC Servo - Disconnect servo motor and check for short to ground. Check for short circuit on transistors. Bad servo drive board SV 004 Excess Voltage in Servo M Series Servo - Check input voltage. Check servo motor for short circuit. Replace servo control pcb AC Servo - Check input voltage. Check servo motor for short circuit. Replace servo control pcb SV 005 Excess Discharge Current M Series Servo - Discharge transistor or pcb is defective AC Servo - Discharge transistor or pcb is defective SV 006 Velocity Unit Power to Low M Series Servo - Incoming power is to low. Check voltage on pins 1 and 2, and 2 and 3 on CNC2 for 19 volts ac. Replace pcb AC Servo - Incoming power is to low. Check voltage on pins 1 and 2, and 2 and 3 on CNC2 for 19 volts ac. Replace pcb. Check 5v fuse. SV 008 Excess Error (Stop) Check parameters 1828 - 1830. Check incoming voltage. Master board may be bad. Check parameters 1828 - 1830. Check incoming voltage. Master board may be bad. SV 009 Excess Error (Moving) Check parameters 1828 - 1830. Check incoming voltage. Master board may be bad.Check for mechanical bind. Check parameters 1828 - 1830. Check incoming voltage. Master board may be bad.Check for mechanical bind. SV 010 Excess Drift Compensation Check connections to motor. Check if parameter 1834 exceeds 500. Master board may be bad Check connections to motor. Check if parameter 1834 exceeds 500. Master board may be bad SV 011 LSI Overflow Check parameters 1826,1825,1820,1816. Pulse coder may be defective. Master board may be defective. Check parameters 1826,1825,1820, 1816. Pulse coder may be defective. Master board may be defective.
- 4. SV 012 Motion Value Overflow Check CMR parameter or feedrate setting failure Check CMR parameter or feedrate setting failure SV 013 Improper V-Ready Off M Series Servo - Check for a 100vac between terminals 3 and 4. Check fuse breaker is not tripped AC Servo - Check for a 100vac between terminals 3 and 4. Check fuse breaker is not tripped SV 014 Improper V-Ready On Velocity control ready signal VRDY was turned on when the position control ready signal PRDY is turned off Velocity control ready signal VRDY was turned on when the position control ready signal PRDY is turned off SV 015 Pulse Coder Disconnect Broken cable to Pulse Coder. Bad pulse coder. Master board may be defective. Broken cable to Pulse Coder. Bad pulse coder. Master board may be defective. SV 017 ILL Position Control LSI A position control LSI fault was detected A position control LSI fault was detected SV 018 Unfit DSOG Frequency Check connection to resolver. Check gain and phase shift. Position detector is bad. Inductosyn/Resolver pcb is bad. Check connection to resolver. Check gain and phase shift. Position detector is bad. Inductosyn/Resol ver pcb is bad. SV 019 Unfit Pulse of Pulse Coder An error was detected in the feedback pulse from the pulse coder An error was detected in the feedback pulse from the pulse coder SV 020 Unfit Phase Shift Value Check connection to resolver. Check gain and phase shift. Position detector is bad. Inductosyn/Resolver pcb is bad. Check connection to resolver. Check gain and phase shift. Position detector is bad. Inductosyn/Resol ver pcb is bad. SV 021 Unfit Pulse Coder 1 Rev On The one revolution signal from the pulse coder was turned on at an abnormal position. The one revolution signal from the pulse coder was turned on at an abnormal position. SV 022 Pulse Coder 1 Rev Missing The one revolution signal from the pulse coder was not turned on within the allowable tme The one revolution signal from the pulse coder was not turned on within
- 5. the allowable tme SV 023 SV Overload Servomotor was overloaded Servomotor was overloaded SV 025 V Ready On Velocity control ready signal VRDY was turned on instead of being turned off when the servo control was turned on. Velocity control ready signal VRDY was turned on instead of being turned off when the servo control was turned on. SV 026 Illegal Axis Arrange Parameter #1023 for the servo axis arrangment was not set properly Parameter #1023 for the servo axis arrangment was not set properly SV 030 Emergency Stop Emergency stop was applied Emergency stop was applied OT 001 "+" Overtravel (Soft 1) OT 002 "-" Overtravel (Soft 1) OT 003 "+" Overtravel (Soft 2) OT 004 "-" Overtravel (Soft 2) OT 005 "+"Overtravel (Soft 3) OT 006 "-" Overtravel (Soft 3) OT 007 "+" Overtravel (Hard) OT 008 "-" Overtravel (Hard) OT 021 "+" Overtravel (Pre-Check) OT 022 "-" Overtravel (Pre-Check) OT 100 Spindle Alarm Spindle motor alarm signal turned on OT 101 Spindle Motor Overheat Spindle motor is overheated. Check Fan on spindle mo OT 102 Excess Velocity Error A deviation is excessive between commanded and actual velocity of spindle motor. Transistor module bad. Spindle motor feedback sensor bad. OT 103 Fuse F7 Blown Check Fuse F7. Check transistor modules OT 104 Fuse F1,F2, or F3 Blown Check Fuse F1,F2, and F3 OT 105 Fuse AF2 or AF3 Blown Check AF2 and AF3. Defective PCB OT 106 Excess Velocity (Analog) Spindle motor speed exceeded the max rating. OT 107 Excess Velocity (Digital) Spindle motor speed exceeded the max rating. OT 108 Voltage (+24V) Check 24Volts, Check voltage selector switch
- 6. Too High OT 109 Power Semiconductor Overload Power semiconductor overheat Check Fan on spindle drive OT 110 Voltage (+15V) Too Low Check 15V test pin on spindle board.Check Fuses. Replace spindle Board OT 111 Voltage Excess(DC Link) The voltage on the DC Link is to high. Check incoming voltage. OT 112 Current Excess (DC Link) High current. Check motor for short. Check transistors. OT 113 CPU Error Replace spindle board OT 114 Rom Error Rom ics defective. Replace spindle board. OT 115 Option Alarm Auxiliary alarm for spindle motor. OT 116 Disconnection Pulse Coder Bad Pulse Coder. Broken Cable. Fanuc AC Spindle Alarm Codes AC Spindle Drive Faults Alarm List for the following Drives: Model 1 A06B-6052-H001 Model 2 A06B-6052-H002 Model 3 A06B-6052-H003 Alarm List for the following Drives: Model 3 thru Model 40 A06B-6044-Hxxx Alarm # Led Display Content of Alarms 8 4 2 1 Alarm # Led Display Content of Alarms 8 4 2 1 1 o Motor Overheat 2 o Speed deviates from commanded speed 3 o o Regenerative fault 6 o o Excess Motor Speed Analog 7 o o o Excess Motor Speed Digital 8 o Voltage higher than specified 9 o o Radiator for power semiconductor overheat 10 o o +15Volt Supply is low 11 o o o DC Link voltage is high 12 o o DC Link current is high 13 o o o CPU and peripheral parts are defective 14 o o o ROM is defective
- 7. 1 o Motor Overheat 2 o Speed deviates from commanded speed 3 o o Fuse F7in DC link is blown out. 4 o Fuses F1,F2,F3 for AC input blown out. 5 o o Fuses AF2 or AF3 on PCB are blown out. 6 o o Excess Motor Speed Analog 7 o o o Excess Motor Speed Digital 8 o Voltage higher than specified (24v) 9 o o Radiator for power semiconductor overheat 10 o o +15Volt Supply is low 11 o o o DC Link voltage is high 12 o o DC Link current is high 13 o o o CPU and peripheral parts are defective 14 o o o ROM is defective 15 o o o o Option circuit fault. Digital AC Spindle Drive Alarm List for the following drives: Model 3 thru 22 A06B-6055-Hxxx Alarm Display Alarm Content AL-01 Motor Overheated AL-02 Speed deviates from commanded speed AL-03 Fuse F7in DC link is blown out. AL-04 Fuses F1,F2,F3 for AC input blown out. AL-06 Excess Motor Speed Analog AL-07 Excess Motor Speed Digital AL-08 Voltage higher than specified (24v) AL-09 Radiator for power semiconductor overheat AL-10 +15v power supply is abnormally low AL-11 DC Link voltage is high AL-12 DC Link current is high AL-13 Data memory for CPU abnormal AL-16 RAM in NVRAM is abnormal AL-17 ROM in NVRAM is abnormal AL-18 Check sum alarm of ROM AL-19 Excessive alarm of U phase current detection circuit offset AL-20 Excessive alarm of V phase current detection circuit offset AL-21 Excessive alarm of velocity command circuit offset. AL-22 Excessive alarm of velocity detection circuit offset. AL-23 Excessive alarm of ER circuit offset. AL-14 ROM is abnormal AL-15 Spindle selection control circuit is abnormal. Alarm List for the following drives:
- 8. Model 1S thru 3S A06B-6059-Hxxx Alarm # Meaning AL-01 Motor Overheat AL-02 Speed deviates from commanded speed AL-03 24v Fuse is blown. (before PCB edition 09A) AL-04 AL-05 AL-06 Excess Motor Speed Analog AL-07 Excess Motor Speed Digital AL-08 Over voltage AL-09 Overheat of radiator AL-10 Low voltage of input power. AL-11 Excessive high voltage of DC link AL-12 Abnormal current of DC link AL-13-15 AL-16-23 Defective arithmetic circuit and peripheral circuit No indication Defective ROM Alarm List for the following drives: Model 6S-26S A06B-6059-Hxxx Alarm # Meaning AL-01 Motor Overheat AL-02 Speed deviates from commanded speed AL-03 24v Fuse is blown. (before PCB edition 09A) AL-04 Open phase of input power. AL-05 AL-06 Excess Motor Speed Analog AL-07 Excess Motor Speed Digital AL-08 Over voltage AL-09 Overheat of radiator AL-10 Low voltage of input power. AL-11 Excessive high voltage of DC link AL-12 Abnormal current of DC link AL-13 Defective arithmetic circuit AL-14 Defective ROM AL-15 Defective optional circuit. AL-16-23 Defective arithmetic circuit and peripheral circuit No indication Defective ROM