KFAS: Fanuc CNC Parts, Service, & Repair
Alarm List for A06B-6111-Hxxx A06B-6141-Hxxx A06B-6112-Hxxx
Alpha-i SPM is equipped with LED Status to indicate alarm condition.
FANUC SPINDLE AMPLIFIER MODULE ALARM CODES LIST
Alarm Code A0
Faulty SPM control PCB
Alarm Code A1
Faulty SPM control PCB
Alarm Code b0
An error occurred in communication between amplifier modules
(SPM and
PSM).
Troubleshooting when this alarm is issued
(a) The cable is defective. If the connection is correct, replace the
(b)The SPM or PSM is defective. Replace the SPM, PSM,
SPM control printed-circuit board, or PSM control printed-circuit
board.
Alarm Codes C0,C1, and
C2
An error occurred in serial communication data between the CNC and
spindle amplifier module.
Troubleshooting when this alarm is issued
(a)The SPM is defective. Replace the SPM or SPM control printed-
circuit board.
(b)The CNC is defective. Replace the board or module related to
the serial spindle.
Alarm Code 01
Spindle motor overheat
Faulty thermostat in spindle motor or faulty feedback cable.
Spindle motor overload, spindle motor cooling fan failure
Alarm Code 02
Excessive speed deviation
SPM overload
Faulty speed sensor and / or spindle feedback cable
Faulty SPM
Alarm Code 03
DC Link fuse blown.
Replace SPM
Alarm Code 07
Excessive Speed
Incorrect speed detector parameter setting
Alarm Code 09
SPM overload/ overheat
Check SPM internal and external cooling fan
Send in SPM to us for wash & test service
Alarm Code 11
Over-voltage in DC link section
Faulty incoming power or PSM
Alarm Code 12
Over-current in DC link section
Defective motor, power cable or SPM
Check motor and power cable then replace SPM
Alarm Code 13
CPU Internal data memory abnormality
Faulty SPM
Alarm Code 15
Spindle switch/output switch alarm
Improper spindle switching sequence
Faulty spindle power MCC or control circuit
Alarm Code 16
RAM checksum error
Faulty SPM
Alarm Code 18
ROM checksum error
Faulty SPM
Alarm Code 19
Excessive U phase current detection in SPM
Faulty SPM
Alarm Code 20
Excessive V phase current detection in SPM
Faulty SPM
Alarm Code 24 (Normal if the CNC control is turned off)
Serial transfer data stopped
Faulty command cable between the CNC and spindle.
Faluty SPM control PCB.
Faulty spindle control circuit on CNC.
Alarm Code 25
Serial transfer data stopped
Faulty command cable between the CNC and spindle.
Faluty SPM control PCB.
Faulty spindle control circuit on CNC.
Alarm Code 26
The C’s contouring control speed detection signal (detector on the motor) is abnormal
Faulty speed sensor, feedback cable for c axis contouring control.
Alarm Code 27
Position coder signal disconnection
Faulty position coder and / or feedback cable.
Alarm Code 28
Speed detection error of C's contouring control
Faulty feedback sensor/ cable.
Alarm Code 29
Excessive load
SPM overload. Check operating conditions
Alarm Code 30
Input circuit over current
Faulty incoming power / AC reactor
Faulty PSM
AL-31
The motor can not rotate at a specified speed.
Faulty speed sensor and / or spindle feedback cable
Faulty SPM
AL-32
Faulty SPM control PCB
AL-33
Insufficient DC link section charging
Faulty PSM
AL-34
The spindle parameter setting is invalid.
Improper spindle parameter setting.
AL-35
Excessive gear ratio data setting
Incorrect gear ratio parameter setting.
AL-36
Error counter overflow
Gear ratio and / or position gain parameters are too large
AL-37
Speed detector parameter setting error
AL-39
Detection error of 1-rotation signal for C's contouring control
Faulty feedback sensor/ cable.
Incorrect parameter setting for C’s contouring control detector.
AL-40
Detection error of 1-rotation signal for C's contouring control
Faulty feedback sensor/ cable.
Incorrect parameter setting for C’s contouring control detector.
AL-41
Detection error of 1-rotation signal for C's contouring control
Faulty feedback sensor/ cable.
Incorrect parameter setting for C’s contouring control detector.
AL-42
Position coder signal abnormal
Faulty position coder and/ or feedback cable
AL-43
Position coder signal abnormal
Faulty position coder and/ or feedback cable
AL-44
Faulty SPM control PCB
AL-46
Position coder signal abnormal
Faulty position coder and/ or feedback cable
AL-47
Position coder signal abnormal
Faulty position coder and/ or feedback cable
AL-48
Position coder 1-rotation signal abnormality
Faulty position coder and/ or feedback cable
AL-49
Spindle synchronization control error
AL-50
Spindle synchronization control error
AL-51
Under voltage at DC link section
Check incoming voltage & PSM
AL-52
ITP signal abnormality 1
CNC control error. Faulty SPM
AL-53
ITP signal abnormality 2
CNC control error. Faulty SPM
AL-54
Overload current alarm
SPM overload.
Check operating conditions of the spindle.
AL-55
Power line abnormality in spindle switching/output switching
Faulty spindle power MCC
Check the magnetic contactors connected to motor power cable
U, V, W.
AL-56
Cooling fan error
Replacement cooling Fan
Send in PSM to us for Wash & Test
Alarm Code 57
Control circuit is erroneous
Faulty SPM control PCB
Replace SPM control PCB
Alarm Code 58
The temperature of PSM heat sink has risen abnormally.
PSM Cooling Fans
Check PSM external cooling fan.
Send in PSM to us for Wash & Test
Alarm Code 59
PSM internal cooling fan error
Replace PSM Cooling fan (internal)
PSM Cooling Fans
Send in PSM to us for Wash & Test
Alarm Code 73
The signal of the motor sensor is disconnected.
(1) If this alarm is issued when the motor is deactivated
(a) The setting of a parameter is incorrect. Refer to "FANUC
AC SPINDLE MOTOR i series Parameter Manual (B-65280EN),
and check the parameter for sensor setting.
(b) The cable is disconnected. Replace the cable.
(c)The sensor is not adjusted correctly. Adjust the sensor
signal. If the sensor signal cannot be adjusted correctly, or
the sensor signal is not observed, replace the connection
cable and sensor.
(d)The SPM is faulty. Replace the SPM or SPM control
printed circuit board.
(2) If this alarm is issued when the cable is moved (as in the case
where the spindle moves). The conductor may be broken. Replace
the cable. If coolant has penetrated into the connector, clean the
connector.
(3) If this alarm is issued when the motor rotates
(a)The shielding of the cable between the sensor and the
SPM is faulty. Referring to, "Connection," in "FANUC
SERVO AMPLIFIER i series Descriptions (B-65282EN),"
check the shielding of the cable.
(b)The signal cable is bundled with the servo motor power
lead. If the cable between the sensor and the SPM is
bundled with the servo motor power lead, separate them
from each other.
Alarm Code 74
The CPU test failed to end normally. When this alarm is issued, replace
the SPM or SPM control printed circuit board.
Alarm Code 75
An error occurred in the CRC test. When this alarm is issued, Replace the
SPM or SPM control printed circuit board.
Alarm Code 79
An abnormal operation was detected in the initial test. When this alarm is
issued, replace the SPM or SPM control printed circuit board.
Alarm Code 81
The position where the one-rotation signal of the motor sensor is
generated is incorrect.
(1) If the external one-rotation signal is used
(a) The settings of parameters are incorrect. Check that the
gear ratio data matches the specification of the machine.
Fanuc-15i PRM 3171 3173 Fanuc 16i/18i/21i PRM 4171 4173
Denominator of gear ratio between motor sensor and spindle
Fanuc-15i PRM 3172 3174 Fanuc 16i/18i/21i PRM 4172 4174
Numerator of gear ratio between motor sensor and spindle
(b) Slippage between the spindle and
motor. Check that
there is no
slippage between the spindle and motor. The
external
one-rotation signal is not applicable to V-belt
connection.
(2)Troubleshooting in other cases
(a) The setting of a parameter is
incorrect. Refer to "FANUC
AC SPINDLE
MOTOR i series Parameter Manual (B-
65280EN)," and check the parameter for sensor setting.
(b) A sensor (MZi sensor or BZi
sensor) is not adjusted
correctly.
Adjust the sensor signal. If the sensor signal
cannot be
adjusted correctly, or the sensor signal is not
observed,
replace the connection cable and sensor.
(c) The shielding of the cable
between the sensor and SPM is
faulty.
Referring to "Connection," in "FANUC SERVO
AMPLIFIER i
series Descriptions (B-65282EN)," check the
shielding of
the cable.
(d) The signal cable is bundled with
the servo motor power
lead. If the
cable between the sensor and SPM is bundled
with the
servo motor power lead, separate them from each
other.
(e) The SPM is faulty. Replace the
SPM or SPM control
printed
circuit board.
Alarm Code 82
The one-rotation signal of the motor sensor is not generated.
Troubleshooting when this alarm is issued
(a) The setting of a parameter is incorrect. Refer to "FANUC AC
SPINDLE MOTOR i series Parameter Manual (B-65280EN)," check
the parameter for sensor setting.
(b) The MZi sensor or BZi sensor is not adjusted correctly. Adjust
the sensor. If the sensor cannot be adjusted or the signal is not
observed, replace the connection cable and sensor.
(c) The external one-rotation signal is faulty. Check the check pin
EXTSC1 on the spindle check board. If the signal is not generated
per rotation, replace the connection cable and position coder. (
(d) The SPM is faulty. Replace the SPM or SPM control printed
circuit board.
Alarm Code 83
The SPM checks the pulse counts of phases A and B each time a one-
rotation signal is generated. The alarm is issued when a pulse count beyond the
specified range is detected.
(1) If this alarm is issued when the cable is moved (as in the case
where the spindle moves) The conductor may be broken. Replace
the cable. If coolant has penetrated into the connector, clean the
connector.
(2)Troubleshooting in other cases
(a)The setting of a parameter is incorrect. Refer to "FANUC
AC SPINDLE MOTOR i series Parameter Manual (B-
65280EN)," check the parameter for sensor setting.
(b)The MZi sensor or BZi sensor is not adjusted correctly.
Adjust the sensor. If the sensor cannot be adjusted or the
signal is not observed, replace the connection cable and
sensor.
(c)The shielding of the cable between the sensor and SPM is
faulty. Referring to "Connection," in "FANUC SERVO
AMPLIFIER i series Descriptions (B-65282EN)," check the
shielding of the cable.
(d) The signal cable is bundled with the servo motor power
lead. If the cable between the sensor and SPM is bundled
with the servo motor power lead, separate them from each
other.
(e) The SPM is faulty. Replace the SPM or SPM control
printed circuit board.
Alarm Code 84
The spindle sensor signal was disconnected. Refer to Alarm Code 73 for
this alarm trouble shooting.
Alarm Code 85
The one-rotation signal of the spindle sensor occurred in an incorrect
location. Refer to Alarm Code 81 for this alarm trouble shooting.
Alarm Code 86
No spindle sensor one-rotation signal occurred. Refer to Alarm Code 82
for this alarm trouble shooting.
Alarm Code 87
A spindle sensor signal is abnormal. Refer to Alarm Code 83 for this alarm
trouble shooting.
Alarm Code 88
The heat sink cooling fan is not
running. If this alarm is issued, replace the
SPM heat sink cooling fan.
Alarm Codes A, A1, and
A2
The control program is not running. An error was detected when the
control program was running.
(1) If this alarm is issued when the spindle amplifier power is
switched on
(a) Wrong software specification
(b)Defective printed-circuit board Replace the SPM or SPM
control printed-circuit board.
(2) If this alarm is issued when the motor is active.
(a) Influence by noise Referring to "Installation" in "FANUC
SERVO AMPLIFIER i series Descriptions (B-65282EN),"
check the grounding wire. If the spindle sensor signal wire is
bundled together with any motor power wire, separate them.
Alarm Code b0
An error occurred in communication between amplifier modules (SPM and
PSM).
Troubleshooting when this alarm is issued
(a) The cable is defective. If the connection is correct, replace the
(b)The SPM or PSM is defective. Replace the SPM, PSM,
SPM control printed-circuit board, or PSM control printed-circuit
board.
Alarm Codes C0,C1, and
C2
An error occurred in serial communication data between the CNC and
spindle amplifier module.
Troubleshooting when this alarm is issued
(a)The SPM is defective. Replace the SPM or SPM control printed-
circuit board.
(b)The CNC is defective. Replace the board or module related to
the serial spindle.
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