Aquacal 100 Troubleshooting Using Displayed Codes, Controls Configuration & Adjustments

Controls Configuration & Adjustments...

Troubleshooting Using Displayed Codes

Interpreting Error Codes

The HP7R heat pump microprocessor controller is designed to be self-diagnostic through the display of various fault codes.

Owners & Operators: If you believe you are experiencing a problem with the heater, and feel a need to call the factory for assistance, it will be beneficial to let the factory Service Representative know which code is being displayed. Having this information at hand will permit the Service Representative to work through–with you–any site related issues causing or contributing to the problem. Then, if after working through site-related issues the heater is still not functioning correctly, the Service Representative will offer to set up a service visit. As necessary, please Contact AquaCal Customer Support Group (800- 786-7751).

Dealers and Service Centers: For troubleshooting use, listed below are all possible fault messages output by the microprocessor, what the codes mean, and possible causes with solutions for the indicated problem. Please contact AquaCal Technical Support Group, as necessary (800-786-7751).

WARNING !

Failure to heed the following may result in permanent injury or death.

Heat pumps contain no owner or operator repairable components. Repairs must not be attempted by untrained and/or unqualified individuals. If service is deemed necessary, contact installing dealer or AquaCal Customer Support at (800) 786-7751.

Message	Error Description	Possible cause
[dPO]	Defrost Sensor Open	Cut or loose sensor wiring
[PO]	Water Temperature	Cut or loose sensor wiring
	Sensor Open
[dPC]	Defrost Sensor Shorted	Short circuit in defrost sensor wiring or defective sensor.
[PC]	Water Temperature	Short circuit in water temperature sensor or defective sensor.
	Sensor Shorted
[LP]	Refrigerant System Low	System refrigerant charge low, defective low pressure switch, clogged
	Pressure Switch Open	evaporator coil, or defective wiring.
[HP]	Refrigerant System High	Low water flow, defective high pressure switch, or defective wiring.
	Pressure Switch Open
[HP5]	5 High Pressure Faults	See causes for [HP]
	Within One Hour (Unit
	Locked)
[LP5]	5 Low Pressure Faults	See causes for [LP]
	Within One Hour (Unit
	Locked)
	Over Temperature Alarm<	Defective compressor contactor, defective controller, or defective water
[OTA]	Temperature over 110oF
	(Unit Locked)	temperature sensor
[FLO]	Low or No Water Flow	Circulating pump off or filter dirty, isolation valves set improperly,
	Detected	defective or improperly set heater water pressure switch
[FS]	Heater in Defrost Mode	Normal function in lower air temperatures. Fan continues to run and
		compressor is off. Compressor will restart when air-coil temperature
		reaches 38oF or above.
[CSE]	Control System Error	Controller may need to be reset. Disconnect then reconnect power to
		controller. If error continues replace control board, display board, or both.

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