“FLO” is displayed on the topside and the heater is prevented from running. If the flow switch is reading no flow while pump 1 is running, the flow switch is open (FLO), then there is no water flowing through the heater. There are two different types of flow switch errors. The topside will display “HL” on the screen (no flash) indicating the high limit and power needs to be cycled to the spa in order to clear this error. In the event of an HL error the heater is shut off to prevent the temperature of the heater barrel from increasing and to prevent damage to the heater barrel which could result in fire, injury, or damage to the spa. The HL error is detected in hardware and if an HL error is detected then a pin is set on the CPU to signal the CPU of the error. Starts when the water temperature is 119oF (48oC) a High Limit (HL) Error is triggered. OtH Heater barrel is heating too quickly. The flow switch is reading flow while pump 1 is off. The flow switch is reading no flow while pump 1 is running.

The temperature of the heater barrel is > 119oF (48oC) FLOįlow Switch Open. The water temperature of the spa is > 112oF (44.5oC) HL

Temperature probe is disconnected from the base board HL (Flashing) 1.1.1 Error Codes Error Code Description Prr The Spas firmware is designed to detect most errors, and then the CPU will provide feedback for the user on the topside, mobile application and by flashing the lights on the spa.

Coleman spas hot tub error codes