YASKAWA Sigma-7 Series Product Manual page 109

Alarm Number:
Possible Cause
Alarm Name
The surrounding tem-
perature around the
Servomotor is too
high.
The motor load is
greater than the rated
load.
A.861:
Motor Over-
A failure occurred in
heated
the Serial Converter
Unit.
A failure occurred in
the SERVOPACK.
The surrounding tem-
perature is too high.
The overheat protec-
tion input signal line is
disconnected or
short-circuited.
An overload alarm
was reset by turning
OFF the power sup-
ply too many times.
A.862:
Overheat Alarm
Operation was per-
formed under an
excessive load.
A failure occurred in
the SERVOPACK.
The temperature
detection circuit in the
Linear Servomotor is
faulty or the sensor
attached to the
machine is faulty.
A.890:
A failure occurred in
Encoder Scale
the linear encoder.
Error
A.891:
A failure occurred in
Encoder Module
the linear encoder.
Error
Confirmation
Reduce the surrounding
Measure the surround-
air temperature of the
ing temperature around
Servomotor to 40°C or
the Servomotor.
less.
Check the load with the
Operate the Servo Drive
accumulated load ratio
so that the motor load
on the Motion Monitor
remains within the speci-
Tab Page on the Sig-
fied range.
maWin+.
Turn the power supply to
the SERVOPACK OFF and
ON again. If the alarm still
occurs, the Serial Con-
–
verter Unit may be faulty.
Replace the Serial Con-
verter Unit.
Turn the power supply to
the SERVOPACK OFF and
ON again. If the alarm still
–
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
Lower the surrounding
Check the surrounding temperature by improving
temperature using a the installation conditions
thermometer. of the Linear Servomotor
or the machine.
Check the input voltage
with the overheat pro-
Repair the line for the
tection input information
overheat protection input
on the Motion Monitor
signal.
Tab Page on the Sig-
maWin+.
Check the alarm display
Change the method for
to see if there is an
resetting the alarm.
overload alarm.
Use the accumulated
Reconsider the load and
load ratio to check the
operating conditions.
load during operation.
The SERVOPACK may be
– faulty. Replace the
SERVOPACK.
The temperature detec-
tion circuit in the Linear
Servomotor may be faulty
or the sensor attached to
– the machine may be
faulty. Replace the Linear
Servomotor or repair the
sensor attached to the
machine.
The linear encoder may
– be faulty. Replace the lin-
ear encoder.
Turn the power supply to
the SERVOPACK OFF and
ON again. If the alarm still
–
occurs, the linear encoder
may be faulty. Replace the
linear encoder.
6.1 Alarm Displays
6.1.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
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*1
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Continued on next page.
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