YASKAWA E-V Series User Manual page 306

Alarm:
Alarm Name
A.7AB:
The fan inside the SERVOPACK
Built-in Fan in
stopped.
SERVOPACK
Stopped
A.820:
A linear scale fault occurred.
Encoder Checksum
Error
(Detected on the encoder A SERVOPACK fault occurred.
side.)
A linear scale fault occurred.
A.840:
Encoder Data Error
(Detected on the encoder
side.)
Malfunction of linear scale
because of noise interference, etc.
The servomotor speed is higher
than the specified speed, when
the control power supply was
turned ON.
A.850:
Encoder Overspeed
(Detected when the con-
An encoder fault occurred.
trol power supply was
turned OFF and then ON
again.)
(Detected on the encoder
side.)
A SERVOPACK fault occurred.
The surrounding air temperature
around the servomotor is too
high.
The servomotor load is greater
than the rated load.
A.860:
Encoder Overheated
(Only when an absolute
An encoder fault occurred.
encoder is connected.)
(Detected on the encoder
side.)
A SERVOPACK fault occurred.
A.890:
A linear scale fault occurred.
Encoder Scale Error
A.891:
An encoder fault occurred.
Encoder Module Error
Cause Investigative Actions
Check for foreign matter or debris
inside the SERVOPACK.
−
−
−
−
Check the speed monitor (Un000)
to confirm the servomotor speed
when the power is turned ON.
−
−
Measure the surrounding air tem-
perature around the servomotor.
Check the accumulated load ratio
monitor (Un009) to see the load.
−
−
−
−
9.1 Troubleshooting
Corrective Actions
Remove foreign matter or debris
from the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Repair or
replace the SERVOPACK.
The linear scale may be faulty.
Repair or replace the linear scale.
The SERVOPACK may be faulty.
Repair or replace the SERVO-
PACK.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the linear scale may be
faulty. Repair or replace the linear
scale.
Correct the wiring around the linear
scale by separating the encoder
cable from the main circuit cable or
by checking the grounding and
other wiring.
Reduce the motor speed to a value
below the speed specified by the
linear scale manufacturer, and turn
ON the control power supply.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the servomotor may be
faulty. Repair or replace the servo-
motor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Repair or replace the SER-
VOPACK.
The surrounding air temperature
must be 40°C or less.
The servomotor load must be within
the specified range.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the servomotor may be
faulty. Repair or replace the servo-
motor.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Repair or replace the SER-
VOPACK.
The linear scale may be faulty.
Repair or replace the linear scale.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the servomotor may be
faulty. Repair or replace the servo-
motor.
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