SLP,  SL,  or  SLEEP  Message

The Spa is Operating in the "Sleep" (SLP or SL) Heating Mode.

The Water Temperature is Sampled Only during Programmed Filter Cycles.  The Heater will Only operate during the Filter Cycles,  and Only Heat up to within 20°F (11°C) of Set Temperature.  The Water Temperature may be 20°F (11°C) or more Below Set Temperature between Filter Cycles.  Other Heating Modes are Standard, Economy, and Standard in Economy Modes.

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