Yaskawa SGDB - Manual (Page 530)

6.2 Troubleshooting
521
J A.C2
Display and Outputs
Digital Operator
Di l d
Alarm Output g p
Display and
Alarm Name
Alarm Code Output Alarm Output
Alarm Name
ALO1 ALO2 ALO3
p
A.C2
Encoder phase
detection error
ON OFF ON OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
Status When Alarm Occurred
D
At power ON During servomotor
operation
A
,
B
,
C
, D
Occurred 1 to 3 seconds
after power ON
A
,
B
,
C
, D
Cause Remedy
A Noise in encoder wiring. Separate encoder wiring from main wiring
circuits.
B Encoder wiring incorrect or poor
connection
Check wiring and connectors at encoder.
C Encoder defective Replace servomotor.
D Circuit board (1PWB) defective Replace SERVOPACK.
6