Generator - A/C issue

Glenn And Kitty wrote:
This is kind of long but I need to give all the details:
I have a 2019, 2425 Coleman bumper pull RV. I have recently been in some “primitive” camping sites with no services. I have an EF3600ISDE Yamaha generator that is dual fuel (Gasoline or Propane). It is a great unit. Here is my issue and questions:
Yesterday it was warm enough to turn on my RV A/C unit. I had the generator running on propane and in full throttle mode not “eco” mode. The A/C fan came on for a minute or so and the generator stayed at 3450 RPM (normal full throttle mode RPM). When the A/C compressor kicked on the generator advanced a few hundred RPMs and then went into “overload” and cut power to RV. The generator cut back the RPMs and kept running at 3450 RPMs but stayed in overload mode. I cut off A/C, shut down generator, and restarted. Generator came back on and was supplying power to RV. I did not have anything else on in RV such as microwave, coffee pot, ect. I tried again to turn on A/C and same result: power to RV was cut and generator in overload mode. Experimenting, I disconnected propane and tried running generator on gasoline. Basic same result.
I noted that generator ran at 3450 RPM’s before turning on A/C when on propane or gasoline. During several attempts, some times the A/C would run a few minutes longer when compressor cut on than other times but always the generator would then go into overload mode and cut power to RV.
On a whim, I restarted generator and put it in eco mode. It ran at 2650 RPM’s on both gasoline and propane in eco mode, I then cut on A/C and much to my surprise the generator went to 3040 RPM’s and A/C stayed on and power to RV was not cut off. A/C and everything worked fine. When A/C compressor would cut off the generator would cut back to 2650RPMs and when compressor cut on generator would rise to the 3050 RPM range. This was on either propane or gasoline operation.
OK so the solution is to just run in eco mode HOWEVER I have a remote start/stop kit installed on the generator and instructions say “only remote start in full throttle mode and not in eco mode (actually any start up, key or remote, is supposed to be in full throttle mode). If I set up the generator in full throttle mode so I can use the remote start and not have to go outside to start the generator I can’t use A/C without going outside and put generator in eco mode. Kind of renders my remote start feature useless.
Any ides why generator would go into overload mode when set on full throttle mode? Any ideas how to correct this?