10.1 Troubleshooting
10-15
10
Inspection, Maintenance, and
T
roubleshooting
(2) Warning Display and Troubleshooting
Table 10.6 Warning Display and Troubleshooting
Warning
Display
Warning Name
Situation at Warning
Occurrence
Cause
Corrective Actions
A.90
Excessive Posi-
tion Error Warn-
ing:
Warning for the
alarm A.d0
Occurred at the servo-
motor high-speed rota-
tion.
The contact in the servomotor U, V, and W wir-
ings is faulty.
Correct the servomotor wiring.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
The servomotor did not
run with position refer-
ence input.
The contact in the servomotor U, V, and W wir-
ings is faulty.
Correct the servomotor wiring.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
Normal movement, but
occurred with a long
distance reference
input.
The SERVOPACK gain adjustment is improper.
Increase the speed loop gain (Pn100) and
position loop gain (Pn102).
The position reference pulse frequency is too
high.
Adjust slowly the position reference
pulse frequency.
Apply the smoothing function.
Correct the electronic gear ratio.
Setting of the position error pulse over flow
warning level (Pn51E) is incorrect.
Set the parameter Pn51E to proper value.
The servomotor specifications do not meet the
load conditions.
Reconsider and correct the load/operation
conditions and servomotor capacity.
A.91
Overload:
Warning for the
alarms A71 and
A72
Occurs when the servo
was ON.
Wiring is incorrect and the contact in servomotor
wiring is faulty.
Correct the servomotor wiring.
Wiring is incorrect and the contact in encoder
wiring is faulty.
Correct the encoder wiring.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
The servomotor did not
run with a reference
input.
Servomotor wiring is incorrect and the contact is
faulty.
Correct the servomotor wiring.
Encoder wiring is incorrect and the contact is
faulty.
Correct the encoder wiring or confirm
that the connector is inserted securely.
The starting torque exceeds the maximum torque.
Reconsider the load and operation condi-
tions. Or, check the servomotor capacity.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
Occurred during nor-
mal operation.
The effective torque exceeds the rated torque.
Reconsider the load and operation condi-
tions. Or, check the servomotor capacity.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
A.92
Regenerative
Overload:
Warning for the
alarm A320
Occurred when the con-
trol power supply was
turned ON.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
Occurred during nor-
mal operation
(Large increase of
regenerative resistor
temperature.)
Regenerative energy exceeds the allowable value.
Check the regenerative resistor capacity,
or reconsider the load and operation con-
ditions.
Regenerative status continues.
Occurred during nor-
mal operation
(Small increase of
regenerative resistor
temperature).
The setting of parameter Pn600 is smaller than
the external regenerative resistor capacity.
Correct the setting of parameter Pn600.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
Occurred at servomo-
tor deceleration.
Regenerative energy is excessive.
Check the regenerative resistor capacity,
or reconsider the load and operation con-
ditions.
A.93
Absolute Encoder
Battery Warning
Occurred when the con-
trol power supply was
turned ON
(Setting: Pn002.2=1).
A SERVOPACK fault occurred.
Replace the SERVOPACK.
Occurred 4 seconds or
more after the control
power supply was
turned ON
(Setting: Pn002.2=0).
When an absolute
encoder was used.
The battery connection is incorrect or faulty.
Connect correctly the battery.
The battery voltage is lower than the specified
value 2.7 V.
Replace the battery, and turn OFF the
encoder power supply and ON again.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
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