Open up the generator slide and check the multi pin connector by the main power wire and make sure it is seated. This is how the coach talks to the generator.
Also make sure the generator slide is closed. I don't thing the AGS will work if the generator slide is open.
Turn off the house batteries for 10 seconds, this will reset the eplex system.
Have you used the AGS in the past?
Can you start the generator manually?
John, Pam, and Aria
2015 London Aire
2015 GMC Seirra