12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
12-15
A.100:
Overcurrent
Detected (An
overcurrent
flowed through
the power trans-
former or the heat
sink overheated.)
The Main Circuit
Cable is not wired
correctly or there is
faulty contact.
Check the wiring. Correct the wiring.
page 4-19
There is a short-circuit
or ground fault in a
Main Circuit Cable.
Check for short-circuits
across Servomotor
phases U, V, and W, or
between the ground
and Servomotor phases
U, V, and W.
The cable may be short-
circuited.
Replace the cable.
There is a short-circuit
or ground fault inside
the Servomotor.
Check for short-circuits
across Servomotor
phases U, V, and W, or
between the ground
and Servomotor phases
U, V, or W.
The Servomotor may be
faulty.
Replace the Servomotor.
There is a short-circuit
or ground fault inside
the SERVOPACK.
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.
The SERVOPACK may be
faulty.
Replace the SERVO-
PACK.
The regenerative
resistor is not wired
correctly or there is
faulty contact.
Check the wiring. Correct the wiring.
page 4-16
The dynamic brake
(DB, emergency stop
executed from the
SERVOPACK) was
frequently activated,
or a DB overload
alarm occurred.
Check the power con-
sumed by the DB resis-
tor to see how
frequently the DB is
being used.
Or, check the alarm dis-
play to see if a DB over-
load alarm (A.730 or
A.731) has occurred.
Change the SERVOPACK
model, operating meth-
ods, or the mechanisms
so that the dynamic brake
does not need to be used
so frequently.
–
The regenerative
resistor value
exceeded the SER-
VOPACK regenerative
processing capacity.
Check the regenerative
load ratio in the Sig-
maWin+ Motion Monitor
Tab Page to see how
frequently the regenera-
tive resistor is being
used.
Select a regenerative
resistance value that is
appropriate for the oper-
ating conditions and load.
–
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction
Reference
for Correc-
tion
To Next Page
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