Sam karo

I faced same issue, it turned out that the thermostat is damaged due to the high humidity, you can replace it with a new one or if it still working you need to move it's terminals to another location in the circuit then you need to clean the board carefully and isolate the board using a special spray and then the issue will be solved. Worth mentioning that you can reverse the fans so the air comes from inside to outside the inverter instead of the way that the company designed! This will surely helps alot!!