Oasis Controller & Pentair Pump stopped communicating after heater use

I have an in ground pool and spa with a Waterway Plastics Oasis controller, pentair intelliflo variable speed pump and mastertemp 400 natural gas heater. Two days ago, my pool water temperature was 57 degrees F. I heated the pool for 6 hours up to 81 degrees F. I then pressed the pool heat button to turn off the pool heat and the screen showed a countdown of 55 seconds for a cool down cycle. I waited until that was completed then I pressed the P/S mode button on the Oasis controller to...

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