8-7
8-3 Troubleshooting
8
Troubleshooting
14
Overcurrent
Occurs when the Servo
Drive is turned ON.
•
Control PCB error
•
Replace the Servo Drive.
•
Servomotor power line is
short-circuited or ground-
faulted between phases.
•
Repair the short-circuited
or ground-faulted wire.
•
Measure the insulation
resistance at the Servo-
motor and, if there is a
short-circuit, replace the
Servomotor.
•
Miswiring between
phase U, V, or W and
ground.
•
Correct the wiring.
•
Servomotor winding is
burned out.
•
Measure the wire wound
resistance, and if the
winding is burned out, re-
place the Servomotor.
•
The relay for the dynamic
brake has been conse-
quently welded.
•
Do not frequently input
the RUN Command In-
put.
•
Do not operate the sys-
tem by turning the Servo
Drive ON and OFF.
•
Servomotor non-confor-
mity
•
Use a Servomotor that is
appropriate for use with
the Servo Drive.
•
The pulse input timing is
too fast.
•
Wait 100 ms min. before
inputting pulses after
turning ON the RUN
Command Input (RUN).
•
The resistor in the Servo
Drive is abnormally over-
heating.
•
Reduce the ambient tem-
perature of the Servo
Drive to 55
°
C or lower.
•
If the relay does not click
when the power supply is
turned ON, replace the
Servo Drive.
16
Overload
Occurs when the Servo
Drive is turned ON.
•
There is an error in the
Servomotor wiring (e.g.,
the wiring or the contacts
are faulty).
•
Wire the Servomotor
Power Cable correctly.
•
The electromagnetic
brake is ON.
•
Reset the brake.
•
The Servo Drive is faulty.
•
Replace the Servo Drive.
Occurs during opera-
tion.
•
The actual torque ex-
ceeds the rated torque.
•
The starting torque ex-
ceeds the maximum
torque.
•
Review the load condi-
tions and operating con-
ditions.
•
Review the Servomotor
capacity.
•
An unusual noise oscilla-
tion or vibration is caused
by faulty gain adjustment.
•
Adjust the gain correctly.
•
The Servo Drive is faulty.
•
Replace the Servo Drive.
Alarm
code
Error
Status when error
occurs
Cause
Countermeasure