Carson inverter question

[AdventureGSA]

I just purchased a 93 jayco pop up trailer and have a inverter question I hope you guys can help with. I was wondering along with the fuses there is an push /pull type breaker. Is there a time I need that popped out or just always in the on position? I thought maybe for running on 110 I needed it off or something. Thanks for the input it's much appreciated.

[abarkl]

It appears as though it needs to be On for the 120 volt outlets to be energized.
Here is the manual;
http://www.carson-mfg.com/pdf/Carson...K-2_Manual.pdf