[Cause]
The arc starting height adjustment failed for some reason.
[Countermeasure]
Check that the arc-start height adjustment settings are appropriate. If another alarm occurs at the same time, resolve that alarm first. If this alarm cannot be cleared, 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.