YASKAWA SGM7D-30F Product Manual page 128

Alarm Number:
Possible Cause
Alarm Name
A heavy load was
applied while the Ser-
vomotor was stopped
or running at a low
speed.
A.100:
Overcurrent
Detected
A malfunction was
(An overcurrent
caused by noise.
flowed through
the power trans-
former or the heat
sink overheated.)
A failure occurred in
the SERVOPACK.
The Main Circuit
Cable is not wired
correctly or there is
faulty contact.
There is a short-circuit
or ground fault in a
Main Circuit Cable.
There is a short-circuit
or ground fault inside
the Servomotor.
A.101:
Motor Overcur- There is a short-circuit
rent Detected or ground fault inside
(The current to the SERVOPACK.
the motor
exceeded the
allowable cur-
A heavy load was
rent.)
applied while the Ser-
vomotor was stopped
or running at a low
speed.
A malfunction was
caused by noise.
A failure occurred in
the SERVOPACK.
3.2 FT82 SERVOPACK with MECHATROLINK-II Communications References
Confirmation
Check to see if the
operating conditions
exceed Servo Drive
specifications.
Improve the noise envi-
ronment, e.g. by
improving the wiring or
installation conditions,
and check to see if the
alarm still occurs.
–
Check the wiring.
Check for short-circuits
across cable phases U,
V, and W, or between
the ground and cable
phases U, V, and W.
Check for short-circuits
across Servomotor
phases U, V, and W, or
between the ground
and Servomotor phases
U, V, or W.
Check for short-circuits
across the Servomotor
connection terminals U,
V, and W on the SER-
VOPACK, or between
the ground and termi-
nals U, V, or W.
Check to see if the
operating conditions
exceed Servo Drive
specifications.
Improve the noise envi-
ronment, e.g. by
improving the wiring or
installation conditions,
and check to see if the
alarm still occurs.
–
3.2.3 Troubleshooting Alarms
Continued from previous page.
Correction
Reduce the load applied
to the Servomotor. Or,
increase the operating
speed.
Implement countermea-
sures against noise, such
as correct wiring of the
FG. Use an FG wire size
equivalent to the SERVO-
PACK's main circuit wire
size.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
Correct the wiring.
The cable may be short-
circuited. Replace the
cable.
The Servomotor may be
faulty. Replace the Servo-
motor.
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Reduce the load applied
to the Servomotor. Or,
increase the operating
speed.
Implement countermea-
sures against noise, such
as correct wiring of the
FG. Use an FG wire size
equivalent to the SERVO-
PACK's main circuit wire
size.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
Continued on next page.
Reference
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3-59