how to repair inverter , 3kva 24v dc solar inverter

part "1" of solar panel inverter repairing series , this device is hybrid inverter work with solar panels and batteries with capacity 3kva - 2400w 24v with 1500w solar mppt charger , the error code [09] its a common fault in this type of inverter's and its easy to fix if you follow the right method of repairing technics.