SV Series Heat Pump Error Codes

HEAT PUMP AMB – Ambient temperature sensor error

No signal from ambient temperature sensor, or signal is corrupted

• Check ambient sensor is connected to heat pump pcb
• Inspect data cable for damage and check data cable connected correctly to SV spa control
• Disconnect/reconnect data cable from SV spa control and reset mains power
• Replace data cable if problem unresolved (use double‐shielded CAT5/CAT6 Ethernet cable)

HEAT PUMP COND – Condenser/Evaporator temperature sensor error

No signal from ambient temperature sensor, or signal is corrupted

• Check condenser sensor is connected to heat pump pcb
• Inspect data cable for damage and check data cable connected correctly to SV spa control
• Disconnect/reconnect data cable from SV spa control and reset mains power
• Replace data cable if problem unresolved (use double‐shielded CAT5/CAT6 Ethernet cable)

HEAT PUMP FLOW – Water flow not detected

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:

• Check that isolation and bypass valves have been positioned correctly to suit filtration pump
• Check the spa water level is OK and confirm that water is flowing freely into filter area
• Check there is adequate water flow. If no flow, bleed air locks from pipe work
• Inspect pipe work and follow flow direction to ensure water is flowing out of the spa into the bottom inlet pipe on the heat pump, flowing out of the top outlet pipe on the heat pump and returning to the spa. If heat pump has been plumbed in reverse direction, correct plumbing or rotate direction of flow switch 180 degress.
• Check filtration pump operation for internal thermal cut out operation or motor stall.

Existing installs:

• Check the spa water level is OK, refill if necessary
• Clean or replace filter cartridges
• If the spa has just been emptied/refilled, bleed air locks from pipe work
• Check filtration pump is working OK and has not seized
• Check the Flow Switch isn’t damaged & replace if necessary

HEAT PUMP LOW P – Compressor low pressure switch open

No signal from low pressure switch or insufficient refrigerant gas charge

• Check low pressure switch is connected to heat pump pcb
• Check refrigerant level, if low have heat pump checked by a refrigeration technician

HEAT PUMP HIGH P – Compressor high pressure switch open

No signal from high pressure switch or refrigerant pressure too high due to heat

• Check high pressure switch is connected to heat pump pcb
• Check water flow is OK (low water flow rates could cause high pressure errors)
• Confirm ambient air temperatures are within operational limits of -2°C – 40°C and fan is working

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.

HEAT PUMP COMP – Compressor thermal cut out open

Compressor has overheated or thermal cut out signal is corrupted

• Confirm ambient air temperatures are within operational limits of -2°C – 40°C and fan is working
• Turn mains power OFF, leave heat pump for 45 minutes for compressor to cool and test again
• Inspect data cable for damage and check data cable connected correctly to SV spa control
• Replace data cable if problem unresolved (use double‐shielded CAT5/CAT6 Ethernet cable)

HEAT PUMP EXCH – Heat exchanger thermal cut out open

Water temperature in heat exchange tank exceeds 50°C or thermal cut out signal is corrupted

• Check spa water level and ensure water flow from filtration pump is OK
• Clean or replace spa filter cartridges to improve water flow
• Inspect data cable for damage and check data cable connected correctly to SV spa control
• Replace data cable if problem unresolved (use double‐shielded CAT5/CAT6 Ethernet cable)