No signal from ambient temperature sensor, or signal is corrupted
No or insufficient water flow passing through heat pump. The flow switch must close within 30 seconds of filtration pump operation. If a heat pump flow error occurs there is insufficient or no water flow to close the flow switch. Once a flow error has occurred, even if water flow has been re‐established, mains power to the SV spa control must be reset before the heat pump will operate again.
New installations:
Existing installs:
No signal from low pressure switch or insufficient refrigerant gas charge
No signal from high pressure switch or refrigerant pressure too high due to heat
NOTE: In extreme environmental weather conditions (i.e. ambient temp > 38°C), depending on heat pump location & environment and nearby obstructions and air flow restrictions (i.e. fences, plants, walls) if the heat pump is used for COOLING, the refrigerant may exceed its working capacity and shut down on high pressure error. To prevent this, the heat pump should only be used for COOLING at times of day/night when ambient temperatures are lower, and prior to extreme hot weather.
Compressor has overheated or thermal cut out signal is corrupted
Water temperature in heat exchange tank exceeds 50°C or thermal cut out signal is corrupted
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