
APPENDIX
B–63004EN/02
G. ALARM LIST
839
No. DescriptionFaulty location and remedy
SPM in-
dica-
tion(*1)
Message
7n03 SPN_n_ : FUSE ON DC
LINK BLOWN
03 1 Replace the SPM unit.
2 Check the motor insulation status.
3 Replace the interface cable.
The PSM becomes ready (00 is indi-
cated), but the DC link voltage is too
low in the SPM.
The fuse in the DC link section in the
SPM is blown. (The power device is
damaged or the motor is ground–
fault.)
The JX1A/JX1B connection cable is
abnormal.
7n04 SPN_n_ : INPUT FUSE/
POWER FAULT
04 Check the PSM input power supply
status.
The PSM detects open phase of pow-
er. (PSM alarm indication: 5)
7n07 SPN_n_ : OVERSPEED 07 Check for a sequence error. (For ex-
ample, check whether spindle syn-
chronization 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.)
7n09 SPN_n_ : OVERHEAT
MAIN CIRCUIT
09 1 Improve the heat sink cooling sta-
tus.
2 If the heat sink cooling fan stops,
replace the SPM unit.
Abnormal temperature rise of the
power transistor radiator
7n11 SPN_n_ : OVERVOLT
POW CIRCUIT
11 1 Check the selected PSM.
2 Check the input power voltage and
change in power during motor de-
celeration. If the voltage exceeds
253 VAC (for the 200–V system) or
530 VAC (for the 400–V system),
improve the power supply imped-
ance.
Overvoltage of the DC link section of
the PSM was detected. (PSM alarm
indication: 7)
PSM selection error. (The maximum
output specification of the PSM is ex-
ceeded.)
7n12 SPN_n_ : OVERCUR-
RENT POW
CIRCUIT
12 1 Check the motor insulation status.
2 Check the spindle parameters.
3 Replace the SPM unit.
The motor output current is abnormal-
ly high.
A motor–specific parameter does not
match the motor model.
Poor motor insulation
7n15 SPN_n_ : SP SWITCH
CONTROL
ALARM
15 1 Check and correct the ladder se-
quence.
2 Replace the switching MC.
The switch sequence in spindle
switch/output switch operation is ab-
normal.
The switching MC contact status
check signal and command do not
match.
7n16 SPN_n_ : RAM FAULT 16 Replace the SPM control printed cir-
cuit board.
Abnormality in an SPM control circuit
component is detected. (RAM for ex-
ternal data is abnormal.)
7n18 SPN_n_ : SUMCHECK
ERROR PGM
DATA
18 Replace the SPM control printed cir-
cuit board.
Abnormality in an SPM control circuit
component is detected. (Program
ROM data is abnormal.)
7n19 SPN_n_ : EX OFFSET
CURRENT U
19 Replace the SPM unit. Abnormality in an SPM component is
detected. (The initial value for the U
phase current detection circuit is ab-
normal.)