Thanks a lot !
I don`t speak Spanish too because I`m Russian
). I just keep my motorhome in Spain.
So, I think Automatic Transfer Switch is the first place I need to check. But I don`t remember does it exist under the bed or not.
So, I`ll be able to check it in the start of January.
Thank you very mach for your advice.
PS. It`s very strangely, but I`ve addressed a request to GS service via Email, but didn`t recieve any assistance.
Regards