YASKAWA SGDS Sigma III Series, User Manual

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10 Inspection, Maintenance, and Troubleshooting
10.1.4 Troubleshooting of Alarm and Warning
10-12
A.720 Overload:
Continuous
Overload
Occurred when the
servo was turned
ON. The encoder wiring is incorrect or the connection is
faulty. Correct the encoder wiring.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Occurred when the
servomotor did not
run by the reference
input. The servomotor wiring is incorrect or the connection
is faulty. Correct the servomotor wiring.
The encoder wiring is incorrect or the connection is
faulty. Correct the encoder wiring.
The starting torque exceeds the maximum torque. Reconsider the load and operation conditions, or
reconsider the servomotor capacity.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Occurred during
normal operation. The actual torque exceeds the rated torque or the
starting torque largely exceeds the rated torque. Reconsider the load and operation conditions, or
reconsider the servomotor capacity.
A SERVOPACK fault occurred. Replace the SERVOPACK.
A.730
Dynamic Brake
Overload Occurred when the
control power
supply was turned
ON. A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred when the
servomotor was
running and in a
status other than
servo OFF. A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred when the
servomotor was
running in servo
OFF status. The rotating energy at a DB stop exceeds the DB
resistance capacity.
Reduce the motor speed,
Reduce the load moment of inertia, or
Reduce the number of times of the DB stop
operation.
A SERVOPACK fault occurred. Replace the SERVOPACK.
A.740
Overload of
Surge Current
Limit Resistor Occurred when the
control power
supply was turned
ON. A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred during
operations other
than the turning
ON/OFF of the
main circuit. A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred at the
main circuit power
supply ON/OFF
operation. The inrush current limit resistor operation frequency
at the main circuit power supply ON/OF operation
exceeds the allowable range. Reduce the number of times that main circuit’s
power supply can be turned ON/OFF to 5 times/
min. or less.
A SERVOPACK fault occurred. Replace the SERVOPACK.
A.7A0 Heat Sink
Overheated
Occurred when the
control power
supply was turned
ON A SERVOPACK fault occurred. Replace the SERVOPACK.
The overload alarm has been reset by turning OFF
the power too many times. Change the method to reset the alarm.
Occurred when the
main circuit power
supply was turned
ON or while the
servomotor was
running. The load exceeds the rated load. Reconsider the load and operation conditions, or
reconsider the servomotor capacity.
The SERVOPACK ambient temperature exceeds
55
° C.
The ambient temperature must be 55 ° C or less.
A SERVOPACK fault occurred. Replace the SERVOPACK.
The overload alarm has been reset by turning OFF
the power too many times. Change the method to reset the alarm.
The connection of the SERVOPACK board and the
thermostat switch is incorrect. Replace the SERVOPACK.
The overload or regenerative energy exceeds the
resistor capacity. Reconsider the load and operation conditions.
The SERVOPACK (direction and distance to the
peripheral devices) is mounted incorrectly.
Heat radiation from the panel or heat around the
SERVOPACK) The ambient temperature for SERVOPACK must
be 55
° C or less.
A SERVOPACK fan fault occurred. Replace the SERVOPACK.
Table 10.3 Alarm Display and Troubleshooting (Cont’d)
Alarm
Display
Alarm Name
Situation at Alarm
Occurrence
Cause Corrective Actions