YASKAWA Sigma-7 SGD7S Series - Page 602

Alarm Code Alarm Name Possible Cause Confirmation Correction Reference
There is a short-circuit
or ground fault inside
the SERVOPACK.
Check for short-cir-
cuits across the Ser-
vomotor connection
terminals U, V, and
W on the SERVO-
PACK, or between
the ground and ter-
minals U, V, or W.
The SERVOPACK
may be faulty.
Replace the SERVO-
PACK.
A heavy load was
applied while the Ser-
vomotor was stopped
or running at a low
speed.
Check to see if the
operating conditions
exceed Servo Drive
specifications.
Reduce the load
applied to the Servo-
motor. Or, increase
the operating speed.
–
A malfunction was
caused by noise.
Improve the noise
environment, e.g. by
improving the wiring
or installation condi-
tions, and check to
see if the alarm still
occurs.
Implement counter-
measures against
noise, such as cor-
rect wiring of the FG.
Use an FG wire size
equivalent to the
SERVOPACK’s main
circuit wire size.
–
A failure occurred in
the SERVOPACK.
– Turn the power
supply to the SER-
VOPACK OFF and
ON again. If an
alarm still occurs, the
SERVOPACK may
be faulty. Replace
the SERVOPACK.
–
A.300
(1300h)
Regeneration
Error
When using the builtin
regenerative resistor,
the jumper between
the regenerative
resistor terminals (B2
and B3) was removed
from one of the fol-
lowing SERVO-
PACKs: SGD7S-
3R8A, -5R5A, -7R6A,
-120A, -180A, -200A,
or -330A.
Check to see if the
jumper is connected
between power
supply terminals B2
and B3.
*3
Correctly connect a
jumper.
Ä Chap. 5.4.6
‘Wiring Regen-
erative Resis-
tors’ page 103
The External Regen-
erative Resistor or
Regenerative Resistor
Unit is not wired cor-
rectly, or was removed
or disconnected.
Check the wiring of
the External Regen-
erative Resistor or
Regenerative
Resistor Unit.
*3
Correct the wiring of
the External Regen-
erative Resistor or
Regenerative
Resistor Unit.
Sigma-7 Series SERVOPACKs
Maintenance
Alarm Displays > Troubleshooting Alarms
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