Hope someone can shed some light on a problem I'm having. I have a combination pool/spa controlled by a Jandy Aqualink 4 and PDA, with 2 Jandy Valve Actuators (JVAs) on the intake and return valves. The automation was installed professionally by the pool builder when it was built, and has worked flawlessly for the last 3 years.
A few days ago, I tried to turn the pool to spa mode, but the valves didn't move at all. The indicators lights in the power center showed that it had switched to spa mode, but the valves didn't move. Using the "1-Off-2" position switches on the underside of the JVAs, the valves turn properly, so I know they're getting power, etc. I thought that perhaps the system had gotten out of sync with what position it thought that the valves were in, so I tried various combinations of the switches, but the system simply won't change the valves. I've tried setting the control panel to "SPA", the set the valves properly using their switches, and then turning back to POOL, hoping that it would turn the valves back. They don't. It doesn't matter what position the JVA switches are in, the control unit just doesn't change them, even though the indicator light shows that it is in the proper mode.
One interesting fact - I've tried resetting the control unit (power cycle, no battery, wipe config, etc), and when I do, sometimes when power is reapplied the valves turn to the opposite position of where they were - but I haven't found any pattern there yet, and I don't know if they're getting a signal to switch from the control unit or just "resetting" to wherever they thing they're supposed to be internally.
I'm really not sure what else to try at this point. I've got my pool professional on standby if I need him, but I'd like to try and resolve this myself if possible. Anyone have any suggestions? Thanks in advance!