YASKAWA SGDV User Manual page 269

9 Troubleshooting
9.1.2 Troubleshooting of Alarms
Alarm Number:
Alarm Name
(Alarm Description)
A.850:
Encoder Overspeed
(Detected when the con-
trol power supply was
turned ON.)
(Detected on the encoder
side.)
A.860:
Encoder Overheated
(Only when an absolute
encoder is connected.)
(Detected on the encoder
side.)
*2
A.b10 :
Speed Reference A/D
Error
(Detected when the
servo is ON.)
*2
A.b11 :
Speed Reference A/D
Data Error
*2
A.b20 :
Reference Torque
Input Read Error
(Detected when the
servo is ON.)
A.b31:
Current Detection
Error 1
A.b32:
Current Detection
Error 2
A.b33:
Current Detection
Error 3
∗2. This alarm will occur only for a SERVOPACK for analog voltage references.
9-10
Cause
The servomotor speed is higher
-1
than 200 min when the control
power supply was turned ON.
An encoder fault occurred.
A SERVOPACK fault occurred.
The ambient operating tempera-
ture around the servomotor is too
high.
The motor load is greater than the
rated load.
An encoder fault occurred.
A SERVOPACK fault occurred.
A malfunction occurred in the
speed reference input section.
A SERVOPACK fault occurred.
A malfunction occurred in the
speed reference input section.
A SERVOPACK fault occurred.
A malfunction occurred in the
reading section of the torque ref-
erence input.
A SERVOPACK fault occurred.
The current detection circuit for
phase U is faulty.
The current detection circuit for
phase V is faulty.
The detection circuit for the cur-
rent is faulty.
The servomotor main circuit
cable is disconnected.
Investigative Actions
Check the motor rotating speed
(Un000) to confirm the servomotor
speed when the power is turned ON.
−
−
Measure the ambient operating tem-
perature around the servomotor.
Check the accumulated load ratio
(Un009) to see the load.
−
−
−
−
−
−
−
−
−
−
−
Check for disconnection of the ser-
vomotor main circuit cable.
(cont'd)
Corrective Actions
Reduce the servomotor speed to a
-1
value less than 200 min , and turn
ON the control power supply.
Restart the SERVOPACK. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
The ambient operating temperature
must be 40°C or less.
The motor load must be within the
specified range.
Restart the SERVOPACK. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Clear and reset the alarm and restart
the operation.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Clear and reset the alarm and restart
the operation.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Clear and reset the alarm and restart
the operation.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Correct the servomotor wiring.