//This issue has been solved below in the thread. Please read on for more info//
Ran a search and found a similar issue/thread however after recs were given the OP never updated his results...
I have a Jandy RS4 Aqualink in house controller and outdoor control box which is no longer communicating with my Hayward Summit heater.
We had a power outage a few days ago. From the indoor unit I can control the pool and spa pumps, spa jets, and spa blower as well as run the actuator valves to alternate between pool and spa modes.
Everything appears to be in working order until I smack the heater button. Then nothing... The outdoor controller when in service mode also no longer turns on the heater. Odd. Everything else works fine here too.
I was afraid the heater was fried but the display panel lights up showing temp as well as all of the menu features. I can turn it on manually so it appears to be fully functional just not receiving any signals from the external control boxes.
So then I started throwing power switches. When in doubt pull the plug. I cycled the heater breaker, pool filter, spa blower, spa jet, and outdoor control panel breakers. I also threw the breakers in the garage.
No result still no communication with the heater...
The heater itself is silly easy to operate. It appears to have the temp set to OFF on both spa and pool modes in order for the controllers to do their work - or it did when I went in looking around. Setting either of these temps higher than the current water temp turns on the heater. But again, this is at the heater itself.
The only thing I was unable to see a reaction with was hitting the inset reset button on the outdoor panel. I broke a toothpick in half and pressed in but did not feel a click or see any of the lights adjust, turn on/off, etc. Just a gummy squishy feel from the end of the toothpick.
So here I am. Your opinions are appreciated.