FANUC Alpha I Series Alarms and Error Codes

A list of error codes for FANUC 6111 aiSP (Type-1) / 6112 SPMi (Type-2) / 6116 aiC / SPMCi spindle amplifiers, plus the high voltage versions such as the 6121 and the 6122 type A and type B appropriately. Knowing your error code could help us provide you with the fast and precise evaluation for repair or exchange services.

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Please contact us for free consultation about any of the following error codes, or any other problems with your FANUC Alpha spindle amplifier. Call 630-616-0039 or fill up a contact form.

AlarmDescription of Alarm/Error
01The inside temperature of the motor is higher than the specified temperature.
02The actual motor speed is largely deviated from the commanded speed.
03The fuse of the DC link has blown (The voltage at the DC link is insufficient).
06The temperature sensor is abnormal, or the temperature sensor cable is broken.
07The motor rotates at a speed exceeding 115% (standard setting) of the maximum allowable speed.
09The temperature of the heat sink of the SPM main circuit has risen abnormally. This alarm is issued for SPM-15i and later.With SPM-2.2i to SPM-11i however, Alarm 12 is issued for the same cause.
12An excessively large current flowed into the DC link of the main circuit.
15In output switching control or spindle switching control, the switching operation sequence was not executed correctly. .
18A sum check is abnormal.
19 / 20The offset voltage of the phase U (19) or phase V (20) current detection circuit is excessively high.
21The specified polarity of the position sensor is incorrect.
24Serial communication data transferred between the CNC and spindle amplifier module contains an error.
27The signal of the position code is disconnected.
29An excessive load (standard setting: load meter reading of 9 V) has been applied continuously for a certain period.
31The motor failed to rotate as specified, and has stopped or is rotating at a very low speed.
36The error counter overflowed.
37After emergency stop signal input, the motor is accelerated without being decelerated.
41The position where the one-rotation signal of the position coder is generated is incorrect.
42The one-rotation signal of the position coder is not generated.
46The one-rotation signal of the position coder cannot be detected normally during thread cutting.
47The count value of position coder signal pulses is abnormal. Phases A and B for the position coder have a feedback pulse count of 4096 p/rev per spindle rotation.
50A value obtained by internal calculation in spindle synchronization exceeded the allowable range.
52 / 53The synchronization signal (ITP) in communication data transferred to and from the CNC stopped.
54A large current flowing in the motor for a long time was detected.
55In spindle switching control or output switching control, a mismatch between the switching request signal (SPSL or RSL) and the power lead state check signal.
56The cooling fan for the control circuit section has stopped.
66An error occurred during communication (connector JX4) between spindle and amplifier.
69This alarm can be issued only when Dual Check Safety is in use.
70This alarm can be issued only when Dual Check Safety is in use.
71This alarm can be issued only when Dual Check Safety is in use.
72This alarm can be issued only when Dual Check Safety is in use.
73The signal of the motor sensor is disconnected.
74This alarm can be issued only when Dual Check Safety is in use.
75This alarm can be issued only when Dual Check Safety is in use.
76This alarm can be issued only when Dual Check Safety is in use.
77This alarm can be issued only when Dual Check Safety is in use.
78This alarm can be issued only when Dual Check Safety is in use.
79This alarm can be issued only when Dual Check Safety is in use.
81The position where the one-rotation signal of the motor sensor is generated is incorrect.
82The one-rotation signal of the motor sensor is not generated.
83The SPM checks the pulse counts of phases A and B each time a one-rotation signal is generated.
84The spindle sensor signal was disconnected.
85The one-rotation signal of the spindle sensor occurred in an incorrect location.
86No spindle sensor one-rotation signal occurred.
87A spindle sensor signal is abnormal.
88The heat sink cooling fan is not running.
A, A1, A2The control program is not running, therefore an error was detected when the control program was running.
b0An error occurred in communication between amplifier modules (SPM, SVM and PSM).
C0, C1, C2An error occurred in serial communication data between the CNC and spindle amplifier module.
C3In spindle switching a mismatch is found between the switching request signal (SPSL) and the internal status of the motor/spindle sensor signal switching circuit (submodule SW).

Request a Free Consultation

Please contact us for free consultation about any of the following error codes, or any other problems with your FANUC Alpha spindle amplifier. Call 630-616-0039 or fill up a contact form.