I've dinked around with a Jandy unit for 7 years now, starting from when they used to be Chlormatic II. If you become fairly fluent in the product and act like you know what you are talking about you may be able to get into customer service for the installers. In the past, I have had very good luck with them helping me out on testing. A couple of them dumped me when they found out I was an owner, another one told me I knew the system better than some of the installers that call. The weaker points of those units tend to be the circuit boards and the sensors. I've gone through four flow sensors, both circuit boards, and a couple of cells. I've not had to deal with the remote controls though. I believe Jandy has a trouble shooting guide that can be down loaded. I even think there was a link to it on a post here at some point in time. I"ve had good luck finding replacement parts and units on Ebay, but you are always taking a chance with private parties. I've been lucky so far. I can't help you out with the PDA part, mine is the simple set up.