
APPENDIXG. ALARM LIST
B–63524EN/01
880
No. DescriptionFaulty location and remedy
SPM in-
dica-
tion(*1)
Message
9n74 SPN_n_ : CPU TEST ER-
ROR
74 Replace the SPM control printed–cir-
cuit board.
An error was detected in a CPU test.
9n75 SPN_n_ : CRC ERROR 75 Replace the SPM control printed–cir-
cuit board.
An error was detected in a CRC test.
9n79 SPN_n_ : INITIAL TEST
ERROR
79 Replace the SPM control printed–cir-
cuit board.
An error was detected in an initial test
operation.
9n81 SPN_n_ : 1–ROT MO-
TOR SENSOR
ERROR
81 1 Check and correct the parameter.
2 Replace the feedback cable.
3 Adjust the sensor.
The one–rotation signal of the motor
sensor cannot be correctly detected.
9n82 SPN_n_ : NO 1–ROT
MOTOR SEN-
SOR
82 1 Replace the feedback cable.
2 Adjust the sensor.
The one–rotation signal of the motor
sensor is not generated.
9n83 SPN_n_ : MOTOR SEN-
SOR SIGNAL
ERROR
83 1 Replace the feedback cable.
2 Adjust the sensor.
An irregularity was detected in a mo-
tor sensor feedback signal.
9n84 SPN_n_ : SPNDL SEN-
SOR DISCON-
NECTED
84 1 Replace the feedback cable.
2 Check the shield processing.
3 Check and correct the connection.
4 Check and correct the parameter.
5 Adjust the sensor.
The spindle sensor feedback signal is
not present.
9n85 SPN_n_ : 1–ROT SPNDL
SENSOR ER-
ROR
85 1 Check and correct the parameter.
2 Replace the feedback cable.
3 Adjust the sensor.
The one–rotation signal of the spindle
sensor cannot be correctly detected.
9n87 SPN_n_ : SPNDL SEN-
SOR SIGNAL
ERROR
87 The one–rotation signal of the spindle
sensor is not generated.
An irregularity was detected in a
spindle sensor feedback signal.
9n88 SPN_n_ : COOLING RA-
DIFAN FAIL-
URE
88 Replace the SPM external cooling
fan.
The external cooling fan stopped.