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