11
Steps to winterize your Heat pump
• Turn off all electrical power to the Heat pump.
• Turn off the circulation pump.
• Disconnect the water piping inlet and outlet from the Heat pump.
• Remove the drain plug and make sure the heat exchanger drains out.
• The Heat pump should be blown out with air to ensure no water is left inside. A compressed airline should be placed
into the water outlet line to blow air through the unit.
• Loosely reconnect the plumbing connection and drain plug to allow any remaining water to drain but block insects
and debris.
• Cover the Heat pump with a protective tarp to prevent snow and other debris from going in the fan grill.
• Finally, ensure that all plumbing going from the Heat pump to the spa has been emptied from all water.
Troubleshooting
Error codes
If a protection kicks in or if an error is detected in the heat pump, an error code will be reported on the spa keypad.
If more than one error is detected, only the error with the highest priority will be displayed.
All error codes are listed below in priority order.
Error code
Error description
HP99
Communication error
HP05
Coil temperature sensor failure
HP18
Water outlet temperature sensor failure
HP42
System 1 high pressure protection
HP46
System 1 low pressure protection
HP41
Water flow protection
HP01
System 1 exhaust temperature sensor failure
HP19
Water inlet temperature sensor failure
HP09
System 1 return gas temperature failure
HP22
Ambient temperature sensor failure
HP65
Ambient temperature too low protection
HP55
Water inlet/outlet temperature difference protection
HP51
System 1 exhaust temperature too high protection
HP63
Water outlet temperature too low protection when defrosting
HP56
Water outlet too cold for cooling
HP57
Standby freeze protection
