Cause : Safety stop comes when safety stop function is activated (during output shutoff). An emergency stop device is active when using the safety stop function. Identify the cause of emergency stop, ensure the safety and restart the system.

1. Check if an emergency stop device is activated.
2. Check if the shorting wire between S1 and PC or between S2 and PC is disconnected when not using the safety stop function.
3. When not using the safety stop function, short across terminals S1 and PC and across S2 and PC with shorting wire for the inverter to run.