11 Inspection, Maintenance, and Troubleshooting
11.1.3 Troubleshooting of Alarm and Warning
11-10
A.73
Dynamic Brake
Overload
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred when the
servomotor was
running and in a sta-
tus 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.
cReduce the motor speed,
dReduce the load moment of inertia, or
eReduce the number of times of the DB stop
operation.
A SERVOPACK fault occurred. Replace the SERVOPACK.
A.74
Overload of
Surge Current
Limit Resistor
(Detected when
the number of
times that the
main circuit’s
power is turned
ON or OFF more
than 10 times/2
seconds.)
Occurred when the
control power sup-
ply 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 surge 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.7A
Heat Sink
Overheated
(Detected when
the heat sink
temperature
exceeds 100 ×
°C.)
Occurred when the
control power sup-
ply 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 ser-
vomotor was run-
ning.
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.
A.81
Encoder
Backup Error
(Detected on the
encoder side.)
(Only when an
absolute encoder
is connected.)
Occurred when the
control power sup-
ply was turned ON.
(Setting:
Pn002.2=1)
A SERVOPACK board fault occurred when an abso-
lute encoder is used with the setting for incremental
encoder.
Replace the SERVOPACK.
Occurred when the
control power sup-
ply was turned ON
using an absolute
encoder. (Setting:
Pn002.2=0)
Alarm occurred when the power to the absolute
encoder was initially turned ON.
Set up the encoder.
The encoder cable had been disconnected once.
First confirm the connection and set up the
encoder.
The power from both the PG power supply (+5 V)
and the battery power supply from the SERVO-
PACK is not being supplied.
Replace the battery or take similar measures to
supply power to the encoder, and set up the
encoder.
An absolute encoder fault occurred.
If the alarm cannot be reset by setting up the
encoder again, replace the encoder.
A SERVOPACK fault occurred. Replace the SERVOPACK.
A.82
Encoder
Checksum
Error
(Detected on the
encoder side.)
Occurred when the
control power sup-
ply was turned ON
or during an opera-
tion.
A fault occurred in the encoder and was detected by
encoder self-diagnosis.
Set up the encoder. If this alarm occurs fre-
quently, replace the servomotor.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Occurred when the
SEN signal turned
ON.
A fault occurred in the encoder and was detected by
encoder self-diagnosis.
Set up the encoder. If this alarm occurs fre-
quently, replace the servomotor.
Table 11.3 Alarm Display and Troubleshooting (Cont’d)
Alarm
Display
Alarm Name
Situation at Alarm
Occurrence
Cause Corrective Actions
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