Yaskawa MP940 - Manual (Page 385)

SERVOPACK Inspection, Maintenance, and Troubleshooting
10.2.1 Troubleshooting Problems with Alarm Displays
10-18
Status and Remedy for Alarm
„ A.86
A.86: Encoder Overheated
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
„ A.9F
A.9F: MP940 Module Error
Display and Outputs
Note: ON: Output transistor is ON.
Cause Remedy
A Absolute encoder turned ON at a speed
exceeding 200 r/min. Turn ON power supply with the servomo-
tor stopped.
B Circuit board (1PWB) defective. Replace SERVOPACK.
Alarm Outputs
Alarm Code Outputs
ALM Output
ALO1 ALO2 ALO3
OFF OFF OFF OFF
Cause Remedy
A The ambient temperature of the ser-
vomotor is high. Alter conditions so that the ambient
temperature goes below 40ºC.
B Servomotor is operating under over-
load. Reduce load.
C Circuit board (1PWB) defective. Replace SERVOPACK.
D Encoder defective. Replace the servomotor.
Alarm Outputs
Alarm Code Outputs
ALM Output
ALO1 ALO2 ALO3
ON ON ON ON
A,B
At power ON
A,B C,D During servomotor operation Occurred when the control
power turned ON.