Generac Home Standby Generator repair help

Can anyone give some advice on what needs to be done to fix a a Generac Home Standby Generator?  Mine will start up each week on the exercise cycle to keep the battery charged,  but during a recent power outage it started right up but power was not transfered to the house.  I thought I saw an article in a recent issue of Handyman regarding such a problem but can't find it now.  Can anyone advise on what to do.   I will surely appreciate the help.   Thanks

The closest thing I can recall is Generator Maintenance Tips.  That article, however, discusses portable generators.

From your question, you seem to be describing a pad mounted generator with an automatic transfer switch.  A control circuit will operate the mechanism of the transfer switch.

In my opinion, your best remedy will be to have a certified technician service the generator's controls.

First check breaker on generator to make sure that it is not tripped or off. If that is not the problem, check voltage coming out of generator. If you have residual voltage ( 5-10 Volts AC) you may have a problem with your voltage regulator, control board or stator and rotor. At this point, you will need to call a Generac service dealer because further diagnosing can damage other components. 

Good luck!

Guillermo