YASKAWA SGM H Series User Manual page 548

11 Inspection, Maintenance, and Troubleshooting
11.1.3 Troubleshooting of Alarm and Warning
Alarm Situation at Alarm
Alarm Name
Display
Occurred when the
control power sup-
ply was turned ON.
Occurred when the
servomotor was
running and in a sta-
Dynamic Brake
tus other than servo
A.73
Overload
OFF.
Occurred when the
servomotor was
running in servo
OFF status.
Occurred when the
Overload of
control power sup-
Surge Current
ply was turned ON.
Limit Resistor
Occurred during
(Detected when
operations other
the number of
than the turning
A.74
times that the
ON/OFF of the
main circuit's
main circuit.
power is turned
Occurred at the
ON or OFF more
main circuit power
than 10 times/2
supply ON/OFF
seconds.)
operation.
Occurred when the
Heat Sink
control power sup-
Overheated
ply was turned ON.
(Detected when
Occurred when the
A.7A
the heat sink
main circuit power
temperature
supply was turned
exceeds 100 ×
ON or while the ser-
°C.)
vomotor was run-
ning.
Occurred when the
control power sup-
ply was turned ON.
(Setting:
Pn002.2=1)
Encoder
Backup Error
(Detected on the
Occurred when the
A.81
encoder side.)
control power sup-
(Only when an
ply was turned ON
absolute encoder
using an absolute
is connected.)
encoder. (Setting:
Pn002.2=0)
Occurred when the
control power sup-
Encoder
ply was turned ON
Checksum
or during an opera-
A.82
Error
tion.
(Detected on the
Occurred when the
encoder side.)
SEN signal turned
ON.
11-10
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Table 11.3 Alarm Display and Troubleshooting (Cont'd)
Occurrence
A SERVOPACK board fault occurred.
A SERVOPACK board fault occurred.
The rotating energy at a DB stop exceeds the DB
resistance capacity.
A SERVOPACK fault occurred.
A SERVOPACK board fault occurred.
A SERVOPACK board fault occurred.
The surge current limit resistor operation frequency
at the main circuit power supply ON/OF operation
exceeds the allowable range.
A SERVOPACK fault occurred.
A SERVOPACK fault occurred.
The overload alarm has been reset by turning OFF
the power too many times.
The load exceeds the rated load.
The SERVOPACK ambient temperature exceeds
°C
55 .
A SERVOPACK fault occurred.
A SERVOPACK board fault occurred when an abso-
lute encoder is used with the setting for incremental
encoder.
Alarm occurred when the power to the absolute
encoder was initially turned ON.
The encoder cable had been disconnected once.
The power from both the PG power supply (+5 V)
and the battery power supply from the SERVO-
PACK is not being supplied.
An absolute encoder fault occurred.
A SERVOPACK fault occurred.
A fault occurred in the encoder and was detected by
encoder self-diagnosis.
A SERVOPACK fault occurred.
A fault occurred in the encoder and was detected by
encoder self-diagnosis.
Cause
Replace the SERVOPACK.
Replace the SERVOPACK.
Reduce the motor speed,
Reduce the load moment of inertia, or
Reduce the number of times of the DB stop
operation.
Replace the SERVOPACK.
Replace the SERVOPACK.
Replace the SERVOPACK.
Reduce the number of times that main circuit's
power supply can be turned ON/OFF to 5 times/
min. or less.
Replace the SERVOPACK.
Replace the SERVOPACK.
Change the method to reset the alarm.
Reconsider the load and operation conditions, or
reconsider the servomotor capacity.
The ambient temperature must be 55°C or less.
Replace the SERVOPACK.
Replace the SERVOPACK.
Set up the encoder.
First confirm the connection and set up the
encoder.
Replace the battery or take similar measures to
supply power to the encoder, and set up the
encoder.
If the alarm cannot be reset by setting up the
encoder again, replace the encoder.
Replace the SERVOPACK.
Set up the encoder. If this alarm occurs fre-
quently, replace the servomotor.
Replace the SERVOPACK.
Set up the encoder. If this alarm occurs fre-
quently, replace the servomotor.
Corrective Actions