SLP or SL Message
If the SLP or SL Message is Alternating with the Water Temperature on the Display, the Spa is Operating in the Sleep Heating Mode.
If the SLP or SL Message is ON Solid (Not Flashing) on the Display, the Spa is Operating in the Sleep Heating Mode, but there is No current water temperature because the Spa is between Filter Cycles.
Ecn or Ec is Alternating with Temp
Ecn or Ec is ON Solid (Not Flashing)
