[Cause]
The assignment of servo torch I/O is invalid.
[Countermeasure]
On the welding I/O screen, check the I/O assignments related to arc welding. Correct any invalid assignments, then perform a power OFF/ON operation. If this alarm occurs without an invalid assignment, before performing other operations (power-off and jogging operations) after this alarm occurs, use the abnormal-condition recording function ("Abnormal Condition Record" in the auxiliary menu) to obtain an image backup and contact the service center. If the abnormal-condition recording function cannot be used, record the conditions and operating steps leading up to the alarm, obtain an image backup, and contact the service center.