Was trying to get everything wired up last night but I'm getting nothing on the SL2 module. No status light and it's not being seen by the RKL. This is the first version and not the v2. It'll actually trip the PC4 powerbar after a few minutes causing the status light on the PC4 to start blinking in amber. I haven't touch this in years and I don't remember if I ever tested the SL2 when I bought it. I also get a iTemp error on the screen when I connect the temp probe.