Do it yourself water system maintenance

Is there a problem with the unit you have? What's it doing ,or not doing?

It is not softning the water and the sulpher guard is not getting rid of the smell

Your best bet is to call your local Kinetico service company. I know softener repairmen that won't touch Kinetico because the system is so complicated.

do it yourself water system maintenance

You want to service this? (see image). I think I'd follow Chayns advice and call in a Kinetico Tech. Good luck, Tom