YASKAWA E-7S SERVOPACK SGD7S Product Manual page 527

15.2 Alarm Displays
15.2.2 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.100:
Overcurrent
Detected
(An overcurrent
flowed through
the power trans-
former or the heat
sink overheated.)
15-16
Possible Cause
The Main Circuit
Cable is not wired
Check the wiring.
correctly or there is
faulty contact.
Check for short-circuits
across Servomotor
There is a short-circuit
phases U, V, and W, or
or ground fault in a
between the ground
Main Circuit Cable.
and Servomotor phases
U, V, and W.
Check for short-circuits
across Servomotor
There is a short-circuit
phases U, V, and W, or
or ground fault inside
between the ground
the Servomotor.
and Servomotor phases
U, V, or W.
Check for short-circuits
across the Servomotor
There is a short-circuit connection terminals U,
or ground fault inside V, and W on the SER-
the SERVOPACK. VOPACK, or between
the ground and termi-
nals U, V, or W.
The regenerative
resistor is not wired
Check the wiring.
correctly or there is
faulty contact.
Check the power con-
The dynamic brake sumed by the DB resis-
(DB, emergency stop tor to see how
executed from the frequently the DB is
SERVOPACK) was being used. Or, check
frequently activated, the alarm display to see
or a DB overload if a DB overload alarm
alarm occurred. (A.730 or A.731) has
occurred.
Check the regenerative
load ratio in the Sig-
The regenerative pro- maWin+ Motion Monitor
cessing capacity was Tab Page to see how
exceeded. frequently the regenera-
tive resistor is being
used.
Check the regenerative
load ratio in the Sig-
The SERVOPACK maWin+ Motion Monitor
regenerative resis- Tab Page to see how
tance is too small. frequently the regenera-
tive resistor is being
used.
Confirmation
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.
Correct the wiring.
Change the SERVOPACK
model, operating meth-
ods, or the mechanisms
so that the dynamic brake
does not need to be used
so frequently.
Recheck the operating
conditions and load.
Change the regenerative
resistance to a value
larger than the SERVO-
PACK minimum allowable
resistance.
Continued from previous page.
Correction Reference
page 4-26
page 4-22
–
*3
Continued on next page.