Справочник Пользователя для Aquacal Heat Pump

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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 if any
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 (727-
823-5642).

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 (727-823-5642).

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 (727) 823-5642

[dPO]

Defrost Sensor Open

Cut or loose defrost sensor wiring.

[PO]

[dPC]

Water Temperature Sensor Open

Defrost Sensor Shorted

Cut or loose temperature sensor wiring.

Short circuit in defrost sensor wiriting or defective defrost sensor.

[PC]

[LP]

Water Temperature Sensor Shorted

Refrigerant System Low

Pressure Switch Open

Short circuit in water temperature sensor or defective sensor.

System refrigerant charge low, defective low pressure switch, clogged 
evaporator coil, or defective wiring.

[HP]

[HP5]

Refrigerant System High Pressure 

Switch Open

5 High Pressure Faults Within One (1) 

Call for Heating or Cooling (Lock Out 

Condition)

Low water flow, defective high pressure switch, or defective wiring. 

See causes for [HP]

[LP5]

5 Low Pressure Faults Within One (1) 

Call for Heating or 

Cooling (Lock Out Condition)

See causes for [LP]

[OTA]

[FLO]

Over Temperature Alarm <

Temperature over 110 F (Unit

Locked)

Low or No Water Flow 

Detected

Defective compressor contactor, defective controller, or defective water 
temperature sensor.

Circulating pump off, water filter dirty, isolation valves set impropery, 
or defective pressure switch.

[FS]

Heater in Defrost Mode

(Heat-Only Units)

Normal function in lower air temperatures. Fan continues to run and compressor 
is off. Compressor will restart when air-coil temperature reaches 38 F or above.

[CSE]

[CEr]

Control System Error

Communication Fault

Controller may need to be reset. Disconnect then reconnect power to controller. 
If error continues, replace control board, display board, or both.
Loss of communication between main board and display board. Reset controller 
or replace communication cable.