Welcome to irv2 .Most systems require a few things to be in place before they will operate. I don't know your coach but some of these are : parking brake set, engine running, transmission in park , 13+ volts on battery. The techs at Power Gear are very helpful and respond quickly to emails. They may be able to walk you through some diagnostics. Their address is
info@powergearus.com . Please let us know how you make out.
Cliff