Generac Guardian 15kW Generator
When a power failure occured my generator failed to perform an automatic transfer to generator power. The unit started up and was running fine but the automatic transfer switch (ATS) in the load center failed to transfer power over. We had to open up the load center and manually switch the ATS.
Electrical Supplies - Generac - Guardian 100 Amp Transfer Switch with Service Disconnect...
Answers & Comments
That sounds just about right, if the relay contacts get welded together it sometimes takes out the driver on the printed circuit board. As you found out, 12vdc from 23 to 194 makes the transfer switch move to the Generator position, relay not energized makes the ATS move to the Normal position.
You can make a nice test function by installing a 10 amp contact switch in series with either the N1 or N2 terminals. When the switch is open the generator thinks the Normal power has failed.
Regards,
Carl