Fanuc Spindle Alarms for Troubleshooting

Alarm #	Led Display				Content of FANUC SPINDLE 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

Alarm List for A06B-6044-Hxxx

Alarm List for the following Drives:

• Model 3 thru Model 40   A06B-6044-Hxxx

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Alarm #	Led Display				Content of Alarms
	8	4	2	1
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 A06B-6055-Hxxx

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 A06B-6059-Hxxx

Alarm List for the following drives:

• Model 1S thru 3S   A06B-6059-Hxxx

 View Fanuc Spindle Amp Alarm Codes for Alpha Series here. 

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 A06B-6059-Hxxx

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

Dealing with FANUC spindle alarms?

Let MRO help you troubleshoot and repair your spindle amplifier, with our professional repair services! Or, if you need a replacement FANUC part, we have you covered with our extensive selection of FANUC parts.

Updated on March 20, 2024 by Joe Kaminski