YASKAWA Sigma-7 SGD7S Series - Page 610

Alarm Code Alarm Name Possible Cause Confirmation Correction Reference
A.7A3
(17A3h)
Internal Temper-
ature Sensor
Error (An error
occurred in the
temperature
sensor circuit.)
A failure occurred in
the SERVOPACK.
– The SERVOPACK
may be faulty.
Replace the SERVO-
PACK.
–
A.7Ab
(17Abh)
SERVOPACK
Built-in Fan
Stopped
The fan inside the
SERVOPACK
stopped.
Check for foreign
matter inside the
SERVOPACK.
Remove foreign
matter from the SER-
VOPACK. If an alarm
still occurs, the SER-
VOPACK may be
faulty. Replace the
SERVOPACK.
–
A.810
(1810h)
Encoder
Backup Alarm
(Detected at the
encoder, but
only when an
absolute
encoder is
used.)
The power to the
absolute encoder was
turned ON for the first
time.
Check to see if the
power supply was
turned ON for the
first time.
Set up the encoder.
Ä Chap. 6.16
‘Resetting the
Absolute
Encoder’
page 186
The Encoder Cable
was disconnected and
then connected again.
Check to see if the
power supply was
turned ON for the
first time.
Check the encoder
connection and set
up the encoder.
Power is not being
supplied both from the
control power supply
(+5 V) from the SER-
VOPACK and from the
battery power supply.
Check the encoder
connector battery
and the connector
status.
Replace the battery
or implement similar
measures to supply
power to the
encoder, and set up
the encoder.
A failure occurred in
the absolute encoder.
– If the alarm still
occurs after setting
up the encoder
again, replace the
Servomotor.
–
A failure occurred in
the SERVOPACK.
– The SERVOPACK
may be faulty.
Replace the SERVO-
PACK.
–
Sigma-7 Series SERVOPACKs
Maintenance
Alarm Displays > Troubleshooting Alarms
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