Your sheet er comes in 5 different models. SFS ____ . What is the power design of the machine and what is your measured input power. Has it been converted from 50 to 60 cycle?
9 errors are usually switching problems. Like a overload opening. Sometimes from overheat or loss or cooling to the control system. Like dirty heat sinks or fans. Airflow obstruction. Especially to the Inverters. There should be nothing stacked around or near the machine for this reason. Beyond that you’ll have to contact Rondo. It may need a software upgrade.