
APPENDIX
B–64144EN/01
G. ALARM LIST
823
No. DescriptionFaulty location and remedy
SVPM
STATUS1
indica-
tion(*1)
Message
7n01 SPN_n_ : MOTOR
OVERHEAT
01 1 Check and correct the peripher-
al temperature and load status.
2 If the cooling fan stops, replace
it.
The internal temperature of the motor
exceeds the specified level.
The motor is used in excess of the
continuous rating, or the cooling com-
ponent is abnormal.
7n02 SPN_n_ : EX SPEED ER-
ROR
02 1 Check and correct the cutting
conditions to decrease the
load.
2 Correct parameter No. 4082.
The motor speed cannot follow a spe-
cified speed.
An excessive motor load torque is de-
tected.
The acceleration/deceleration time in
parameter No. 4082 is insufficient.
7n04 SPN_n_ : INPUT FUSE/
POWER
FAULT
04 Check the state of the input pow-
er supply to the SVPM.
Power supply phase was missed.
7n06 SPN_n_ : THERMAL
SENSOR DIS-
CONNECT
06 1 Check and correct the parame-
ter.
2 Replace the feedback cable.
The temperature sensor of the motor
is disconnected.
7n07 SPN_n_ : OVERSPEED 07 Check for a sequence error. (For
example, check whether spindle
synchronization was specified
when the spindle could not be
turned.)
The motor speed has exceeded
115% of its rated speed.
When the spindle axis was in position
control mode, positional deviations
were accumulated excessively (SFR
and SRV were turned off during
spindle synchronization control.)
7n09 SPN_n_ : OVERHEAT
MAIN CIRCUIT
09 1 Improve the heat sink cooling
status.
2 If the heat sink cooling fan
stops, replace the SVPM unit.
Abnormal temperature rise of the
power transistor radiator
7n11 SPN_n_ : OVERVOLT
POW CIRCUIT
11 Check the input power voltage and
change in power during motor de-
celeration. If the voltage exceeds
264 VAC, improve the power sup-
ply impedance.
Overvoltage of the DC link section
was detected.
7n12 SPN_n_ : OVERCUR-
RENT POW
CIRCUIT
12 1 Check the motor insulation sta-
tus.
2 Check the spindle parameters.
3 Replace the SVPM unit.
The amplifier output current is abnor-
mally high.
A motor–specific parameter does not
match the motor model.
Poor motor insulation
7n13 13 Replace the SVPM control printed
circuit board.
An abnormality was detected in the
SVPM control circuit.
(Internal RAM request)
7n18 SPN_n_ : SUMCHECK
ERROR PGM
DATA
18 Replace the SVPM control printed
circuit board.
Abnormality in an SVPM control cir-
cuit component is detected. (Pro-
gram ROM data is abnormal.)
7n19 SPN_n_ : EX OFFSET
CURRENT U
19 Replace the SVPM unit. Abnormality in an SVPM component
is detected. (The initial value for the U
phase current detection circuit is ab-
normal.)