does the control panel say "service due" or "service required?"
whenever this generator shuts off, and you did not push switch to
initiate shutdown, the light in switch will blink a code; 1-hi temp,
2-low oil press., 3-everything else . this is first level code, you have to push switch to "stop" and release it while it is displaying 3 blink code, and the contol will give 2nd level, 2 digit fault code, identifying which system on genset has the problem. your operators manual should have this procedure in it, and a list of fault codes and
a description of what they mean. The factory service manual is much more detailed in diagnosing and repairing the codes.