YASKAWA JUSP-MD D01A Series - Page 304

9.1 Alarm Displays
9-15
9
Troubleshooting
A.b20:
Reference Torque In-
put Read
Error
(Detected when the
servo is ON.)
A malfunction occurred in the
reading section of the torque ref-
erence input.
−
Clear and reset the alarm and restart
the operation.
A fault occurred in the SERVO-
PACK.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b31:
Current Detection
Error 1
The current detection circuit for
phase U is faulty.
−
Turn the main circuit power supply
OFF and ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b32:
Current Detection
Error 2
The current detection circuit for
phase V is faulty.
−
Turn the main circuit power supply
OFF and ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b33:
Current Detection
Error 3
The detection circuit for the cur-
rent is faulty.
−
Turn the main circuit power supply
OFF and ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
The servomotor main circuit
cable is disconnected.
Check for disconnection of the ser-
vomotor main circuit cable.
Correct the servomotor wiring.
A.bF0:
System Alarm 0
A fault occurred in 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.
A.bF1:
System Alarm 1
A fault occurred in 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.
A.bF2:
System Alarm 2
A fault occurred in 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.
A.bF3
:
System Alarm 3
A fault occurred in 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.
A.bF4:
System Alarm 4
A fault occurred in 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.
(cont’d)
Alarm Number:
Alarm Name
(Alarm Description)
Cause Investigative Actions Corrective Actions