4-17
H
Error Diagnosis by Means of Alarm Display (Parameter Unit)
Alarm
display
Error content
Condition when error oc-
curred
Probable cause
Countermeasures
a
.
02
Parameter cor-
ruption
Occurred when power was
turned on.
Internal memory error
Replace Servo Driver.
a
.
04
Parameter set-
ting error
(HA/LA/V/W
M d l )
Occurred when power was
turned on.
A user parameter was set to
a value outside of the set-
ting range previously.
Change the user parameter
setting so it is within the set-
ting range.
(
Models)
Control board defective.
Replace Servo Driver.
Occurred after auto-tuning
was executed
The compensating gain
(Cn-28) was set a value oth-
er than 0 when auto-tuning
was executed.
Using the Handy-type
Parameter Unit, set Cn-04
and Cn-05 to their factory
default values, set Cn-28 to
0, then execute auto-tuning.
a
.
10
Overcurrent
Occurred when power was
turned on.
Control board defective.
Replace Servo Driver.
Occurred when Servo was
turned on.
•
Current feedback circuit
error
•
Main circuit transistor
module error
Replace Servo Driver.
Servomotor power line is
short-circuited or grounded.
•
Correct the power line
short-circuiting or ground-
ing.
•
Measure the insulation re-
sistance at the Servomo-
tor itself. If there is short-
circuiting, replace the Ser-
vomotor.
There is faulty wiring at the
U, V, or W phase, or the
GR.
Correct the wiring.
Servomotor coil are dam-
aged.
Measure the winding resis-
tance. If the coil are dam-
aged, replace the Servomo-
tor.
Overheating
Occurred during operation.
Occurred even though pow-
er was on.
If
i
d f
The ambient temperature
for the Servo Driver is high-
er than 55
°
C.
Bring the ambient tempera-
ture for the Servo Driver
down to 55
°
C or lower.
If reset is executed after
waiting for a time, operation
resumes.
The load torque is too high.
•
Lighten the load.
•
Lengthen the acceleration
time.
•
Select another Servomo-
tor.
Application
Chapter 4
