5.3 Troubleshooting Alarms
5
Maintenance
5-21
A.861:
Motor Over-
heated
The surrounding tem-
perature around the
Servomotor is too
high.
Measure the surround-
ing temperature around
the Servomotor.
Reduce the surrounding
air temperature of the
Servomotor to 40
°
C or
less.
–
The motor load is
greater than the rated
load.
Check the load with the
accumulated load ratio
on the Motion Monitor
Tab Page on the Sig-
maWin+.
Operate the Servo Drive
so that the motor load
remains within the speci-
fied range.
*1
A failure occurred in
the Serial Converter
Unit.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the Serial Con-
verter Unit may be faulty.
Replace the Serial Con-
verter Unit.
–
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
–
A.862:
Overheat Alarm
The surrounding tem-
perature is too high.
Check the surrounding
temperature using a
thermostat.
Lower the surrounding
temperature by improving
the installation conditions
of the machine.
–
The overheat protec-
tion input signal line is
disconnected or
short-circuited.
Check the input voltage
with the overheat pro-
tection input information
on the Motion Monitor
Tab Page on the Sig-
maWin+.
Repair the line for the
overheat protection input
signal.
–
An overload alarm
was reset by turning
OFF the power sup-
ply too many times.
Check the alarm display
to see if there is an
overload alarm.
Change the method for
resetting the alarm.
–
Operation was per-
formed under an
excessive load.
Use the accumulated
load ratio to check the
load during operation.
Reconsider the load and
operating conditions.
–
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the
SERVOPACK.
–
The sensor attached
to the machine is
faulty.
–
The sensor attached to
the machine may be
faulty. Repair the sensor
attached to the machine.
–
A.8A0:
External Encoder
Error
Setting the origin of
the absolute linear
encoder failed
because the motor
moved.
Before you set the ori-
gin, use the fully-closed
feedback pulse counter
to confirm that the
motor is not moving.
The motor must be
stopped while setting the
origin position.
*1
A failure occurred in
the external encoder.
–
Replace the external
encoder.
–
A.8A1:
External Encoder
Module Error
A failure occurred in
the external encoder.
–
Replace the external
encoder.
–
A failure occurred in
the Serial Converter
Unit.
–
Replace the Serial Con-
verter Unit.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause
Confirmation
Correction
Reference