AL-4301 (CONTACTOR ERROR)
An alarm
occurs.
Turn the control power supply OFF
and then ON.
Alarm?
Yes No
Is the contactor stuck? (See Fig. 22.)
(The contactor should be open.)
Replace the XTU01 circuit board.
Alarm?
Yes No
Replace the WRCA01 circuit board.
Alarm?
Yes No
Contact your Yaskawa
representative.
Before checking the wiring connections,
turn OFF the control power supply.
Use a tester to confirm that all the LEDs
on the SERVOPACK and converter are
unlit and that no charged electricity
remains.
(It may take a few minutes until all the
electricity is discharged.)
Alarm?
Yes No
Converter
L1 L2 L3 B1 B2
Tester
(Measure the
resistance.)
rst
RST
Non-fuse breaker
K14
K15 K13
Confirm that relay K15 of the XTU01 circuit
board is not stuck or disconnected.
(See Fig. 22.)
Alarm?
Yes No
XIU01-
!!
XTU01
Fig. 21
Fig. 22
After turning OFF the non-fuse breaker, measure the
resistance between the non-fuse breaker's secondary
terminals and the converter's input power supply
terminals to confirm that all are open.
Measure the resistance between r and L1, s and L2,
and t and L3.
CAUTION
Continue normal operation.
The defective WRCA01 circuit
board caused the alarm.
Continue normal operation.
The defective XTU01 circuit
board caused the alarm.
Continue normal operation.
The wrong operation of the WRCA
circuit board caused the alarm.
Continue normal operation.
The defective relay caused the alarm.
Continue normal operation.
The stuck contactor caused the alarm.
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