
APPENDIXG. ALARM LIST
B–64114EN/01
798
No. DescriptionFaulty location and remedy
SPM
indica-
tion(*1)
Message
7n79 SPN_n_ : INITIAL TEST
ERROR
79 Replace the SPM control printed–cir-
cuit board.
An error was detected in an initial test
operation.
7n81 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.
7n82 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.
7n83 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.
7n84 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.
7n85 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.
7n86 SPN_n_ : NO 1–ROT
SPNDL SEN-
SOR ERROR
86 1 Replace the feedback cable.
2 Adjust the sensor.
The one–rotation signal of the
spindle sensor is not generated.
7n87 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.
7n88 SPN_n_ : COOLING RA-
DIFAN FAIL-
URE
88 Replace the SPM external cooling
fan.
The external cooling fan stopped.
7n89 89 1 Check the connection in the SPM
and sub–module SM.
2 Replace the sub–module SM.
3 Replace the SPM control printed
circuit board.
The sub–module SM is abnormal.
7n97 SPN_n_ : OTHER
SPINDLE
ALARM
97 Replace the SPM. Another irregularity was detected.
7n98 SPN_n_ : OTHER CON-
VERTER
ALARM
98 Check the PSM alarm display. A PSM alarm was detected.