Tried to run the gen and engine for its monthly exercise. House voltage is 11.9 and In the red on the display I start the generator and it runs for about a minute and shuts off. shore power is unplugged. Worked perfectly fine the last 2 time i ran it. No error messages on the house control panel and both breakers are on. Pretty sure it has an automatic transfer switch. When I plug shore power(115 v20a maintenance power only.) in I hear it click .