Hi Sunil,

This means the inverter is getting too hot.

Most of the time the reason is dust and dirt. This cooling fan of this inverter will act like a big vacuum cleaner and suck in all the dust from the compressor room.

You can try to clean it / blow out the dust with compressed air. Make sure the compressed air is dry!

Also, switch off the power supply and wait at least half an hour, as electric charge will be present for some time in the inverter. When cleaning, don't touch any parts of the inverter, just to be sure.

If this doesn't help, it could be a broken temperature sensor (connected on X30). Check it and replace if necessary.

Good luck and let me know if this was helpful.