If you want to troubleshoot the cause, first of all, you need to know the corresponding right head bending servo brand, and then to the brand's official website to find your use of the corresponding series of drive manuals, and then look at the manuals corresponding to the meaning of AL-18, general manuals will have an alarm code corresponding to the meaning of the cause and simple. You can do your own troubleshooting, it is best to have the same model in the same position for alignment, so that it is good to determine whether the servo drive or servo motor caused.
In the simple but, you find the Tianjin Jianke manufacturer's personnel, ask what the AL-18 alarm means, how to troubleshoot, as the after-sales will generally guide.