YASKAWA Sigma-V Series User Manual page 265

8 Troubleshooting
8.1.2 Troubleshooting of Alarms
Alarm Number:
Alarm Name
(Alarm Description)
A.bF2:
System Alarm 2
:
A.bF3
System Alarm 3
A.bF4:
System Alarm 4
A.C10:
Servo Overrun
Detected
(Detected when the
servomotor power is
ON.)
A.C80:
Absolute Encoder
Clear Error and
Multi-turn Limit Set-
ting Error
8-16
Cause
A fault occurred in the multi-
winding drive unit.
A fault occurred in the multi-
winding drive unit.
A fault occurred in the multi-
winding drive unit.
The order of phases U, V, and W
in the servomotor wiring is incor-
rect.
An encoder fault occurred.
A fault occurred in the multi-
winding drive unit, SERVO-
PACK, or converter.
An encoder fault occurred.
A fault occurred in the multi-
winding drive unit.
Investigative Actions
−
−
−
Check the motor wiring.
−
−
−
−
(cont'd)
Corrective Actions
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
may be faulty. Replace the multi-
winding drive unit.
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
may be faulty. Replace the multi-
winding drive unit.
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
may be faulty. Replace the multi-
winding drive unit.
Confirm that the servomotor is cor-
rectly wired.
If the alarm still occurs after turning
the control power supply OFF and
ON again even though the servomo-
tor is correctly wired, the servomo-
tor may be faulty. Replace the
servomotor.
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive
unit, SERVOPACK or converter
may be faulty. Replace the multi-
winding drive unit, SERVOPACK,
or converter.
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the servomotor may be
faulty. Replace the servomotor.
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
may be faulty. Replace the multi-
winding drive unit.