I'm suspecting both of these issues are in the programming.

The issue of smoke being on all the time is likely one of where the "0 level" if you will. Remember, the skywriter thinks like a servo, but it needs LESS than 0 to register "off"...-15% to -140% are treated as "off". Of course, like any servo, what our RADIOS say is "-15%" may be an entirely different value to the servo. My suggestion here would simply be to dial that off value down as far as it will go using, probably, an Endpoint setting.

As for the system not coming on at times, my GUESS (and it's just that) would be that you're not overriding the pump's built in failsafe. The pump must see a value in the "off" range (-140 to -15) for 5 seconds when powered on before it will activate. Perhaps your system is either not consistently seeing this value, or not seeing it long enough. If your low end is not reaching that range (as evidenced by smoke never going off) then it may certainly not be reaching it long enough, consistently, to always activate the system. The best solution here is to set the subtrim value for the radio to its max negative value.

Finally, keep in mind that any discussion of + or - here is from the PUMP'S point of view...again, like any "servo", it may be reversed from what the radio thinks, so all these values may need to be opposite, e.g. +140 instead of -140, in your particular system.

Here's Sullivan's setup guide with the info above in more detail : http://www.sullivanproducts.com/S753...rogramming.pdf

HTH