1. First check whether terminals X95 and 6 of the inverter are short-circuited. If not, short-circuit them.
2. Secondly, re-plug and unplug the CUVC electric board of the inverter. The CUVC board has good contact and is not plugged in. This phenomenon occurs.
3. Finally, check whether the trigger board or power module of the inverter is broken, and replace the trigger board or power module.