YASKAWA MECHATROLINK Sigma 2 Series User Manual page 183

9 Troubleshooting
A.85
A.85: Encoder Overspeed
Display and Outputs
Alarm Outputs
Alarm Code Outputs
ALO1 ALO2
OFF OFF
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
At power ON
Cause
A Absolute encoder turned ON at a speed
exceeding 200 min
B Circuit board (1PWB) is defective.
A.86
A.86: Encoder Overheated
Display and Outputs
Alarm Outputs
Alarm Code Outputs
ALO1 ALO2
OFF OFF
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
During servomotor
operation
Cause
A The ambient temperature of the servomo-
tor is high.
B Servomotor is operating under overload.
C
Circuit board (1PWB) is defective.
D Encoder is defective.
ALM Output
ALO3
OFF OFF
At SENS_ON command
A, B
-1
.
ALM Output
ALO3
OFF OFF
At power ON
A, B
Alter conditions so that the ambient tempera-
ture goes below 40°C.
Reduce load.
Replace the SERVOPACK.
Replace the servomotor.
9-8
Remedy
Turn ON power supply again with the
servomotor stopped.
Replace the SERVOPACK.
C, D
Remedy
C, D