Small Engine Problems? Ask an Engine Mechanic for Answers ASAP
Most systems have a way of forcing the generator to come on line, as the generator is probably set for auto start and you need to put it to manual on. The auto transfer switch (ATS) often has this function, as well as the generator. Failing that a breaker which isolates the batteries to bring the generator online.
Can you check the frequency by changing the display to Hz, and let me know if its showing 50Hz?
I would re check the configuration of the generator as it would suggest some how the output voltage has been set to 115v rather than 230, if the switch is correctly positioned, then it may be a switch fault.
Let me know outcome of checking frequency and output voltage switch