AL-4303 (CONVERTER READY SIGNAL ERROR)
An alarm
occurs.
Check connector CN30 of the WRCA
circuit board. (See Fig. 26.)
Alarm?
Yes No
Check connector CN1 of the
converter. (See Fig. 26.)
Alarm?
Yes No
Check connector CN7 of the converter.
Alarm?
Yes No
Is the contactor ON?
NoYes
Confirm that the contactor is not
stuck. (See Fig. 25.)
Alarm?
Yes No
Confirm that relay K15 of the XTU01
circuit board is not stuck or
disconnected. (See Fig. 24.)
Replace the XTU01 circuit board.
Alarm?
Yes No
Replace the WRCA01 circuit board.
Alarm?
Yes No
Contact your Yaskawa
representative.
Replace the converter.
Alarm?
Yes No
Are the LEDs lit in green
and red when the servo is
ON?
YesNo
Continue normal
operation.
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.)
K14
K15 K13
Alarm?
Yes No
Converter SERVOPACK
CN30
CN1
CN7
Converter
L1 L2 L3 B1 B2
rst
RST
Non-fuse breaker
Tester
(Measure the
resistance.)
XIU01-
!!
XTU01
Fig. 24
Fig. 25
Fig. 26
CAUTION
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.
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 poor contact 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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