YASKAWA SGDV-OCA05A - Page 468

14.2 Alarm Displays
14.2.2 Troubleshooting Alarms
14
Maintenance
14-27
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 Linear Servomotor
or the machine.
–
The overheat protec-
tion input signal line is
disconnected or
short-circuited.
Check the input voltage
of the overheat protec-
tion input on the Motion
Monitor Tab Page on
the SigmaWin+.
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 temperature
detection circuit in the
Linear Servomotor is
faulty or the sensor
attached to the
machine is faulty.
–
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.
–
A.890:
Encoder Scale
Error
A failure occurred in
the linear encoder.
–
The linear encoder may
be faulty. Replace the lin-
ear encoder.
–
A.891:
Encoder Module
Error
A failure occurred in
the linear encoder.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the linear encoder
may be faulty. Replace the
linear encoder.
–
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.
page 12-3
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.
–
A.8A2:
External Incre-
mental Encoder
Sensor Error
A failure occurred in
the external encoder.
–
Replace the external
encoder.
–
A.8A3:
External Abso-
lute Encoder
Position Error
A failure occurred in
the external absolute
encoder.
–
The external absolute
encoder may be faulty.
Refer to the encoder
manufacturer’s instruc-
tion manual for correc-
tions.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference