Lift station pump wont work on auto
Have you tried to manually tilt floats to check that the micro relays are working
Do you have a phase monitor in the control circuit? Usually a phase monitor will only work withing 10% of the frequency and voltage. If your generator is not tuned then you could get a fault. If your generator is not working at 60 hz +/- 6 hz then it will shut down. Also if the voltage is unbalanced 5% or more it will shut down. see if you can reset the phase monitor.