YASKAWA YASNAC XRC - Al-0020 (Cpu Communication Error)

Continue normal operation.
The defective CPU board caused
the alarm.
AL-0020 (CPU COMMUNICATION ERROR)
An error occurs during the CPU communications test.
Continue normal operation.
Replace the CPU board.
Continue normal operation.
Continue normal operation.
The defective XCP01 circuit
board caused the alarm.
Continue normal operation.
The defective XBB01 circuit board
caused the alarm.
Contact your Yaskawa representative.
No
Yes
Yes No
No Yes
Yes
No
NoYes
Alarm?
Alarm?
Alarm?
Alarm?
Alarm?
Remove the corresponding CPU board and
remount it.
Remove the XCP01 circuit board and remount it. Continue normal operation.
No Yes
An alarm occurs.
Turn the power OFF and then ON.
Alarm?
Replace the XCP01 circuit board.
Replace the XBB01 circuit board.
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