Issues and Resolutions

The heat pump has sensed the evaporator coil is icing up. See "Ice Forming on the Heat Pump"

No action is required.

The heat pump has encountered a software error.

Call for service.

Low or no water detected. This is normal when circulation pump is deactivated.

1. Confirm the filter pump is on.
2. If a multiple-speed filter pump is being used, run at a higher speed to determine if the error persists. Do not exceed maximum flow rate for your model.
3. Confirm water is not being diverted away from the heat pump.
• See "Water Flow Rates"
• See "Adjusting Water Flow Using ΔT (Delta-T)"

If when pressing the "Pool / Spa" button the display flashes the message "SET TO SWITCH REMOTELY", the heat pump is using a remote relay switch or a 3-wire controller.

• The Pool and Spa thermostat automatically switch when using these modes.
• Manual operation will not be available when using these external devices. No action is required.

The heat pump has encountered a software error.

• The model number and serial number will need to be reentered into the system. The system will then operate as normal.
  • See "Identifying Model Specifications"

• If the issue reoccurs, please contact AquaCal^® Technical Support.

1. If heat pump display shows "UNDER REMOTE CONTROL", use external control device to control heat pump.
2. If needed, check with external controller manufacturer for further assistance using that device.

1. Confirm equipment is receiving power. Is the heat pump display illuminated?
   • If not, confirm the main breaker (located at the power supply panel) and the disconnect switch (located near the heat pump) are both turned on.
   • If the display still does not illuminate, it is recommended that the heat pump installer or electrician confirms heat pump is receiving power.
2. Confirm correct mode is selected.
3. Confirm thermostat is set correctly.
   • When heating the water is desired, the thermostat should be set above the current water temperature.
   • When cooling the water is desired, the thermostat should be set below the current water temperature.
4. If an error code is displayed, diagnose and correct the cause of the code.
   • See "Fault Codes"
5. If the heat pump is using an external controller, the heat pump may not be set correctly to accept the controller’s signal.

1. Have an electrician confirm breakers are correct type, in good condition, and properly sized for the heat pump.
2. If AquaCal®heat pumps have been connected to each other using a multiple heat pump configuration, the configuration may be incorrect. Please confirm settings or contact installer of equipment.
   • See "Connecting Multiple Heat Pumps (Master / Slaved)"

1. Confirm the correct mode has been set on the heat pump.
2. Confirm the heat pump has reached the desired temperature set on the thermostat. The heat pump will continue to run until the set temperature is reached.
3. If the heat pump is using an external controller, it may not be set correctly. See external controller's manual.

When conditions are too cold for proper operation, the heat pump will enter a defrost mode. This prevents ice from building up on the evaporator coil.

The "Pool / Spa" button is disabled if the following devices have been configured on the heat pump.

• A 2-wire external controller.
• A 3-wire external controller.
• An external flow switch.

The water may be normal condensation produced as a by-product of the heat pump's refrigeration process. The heat pump can produce 8 to 10 gallons of condensation per day depending on the humidity of the ambient air. Determine if the water is condensation or a possible leak.

1. Deactivate heat pump, leaving the filter pump on. After several hours, determine if water is still coming from the heat pump.
2. If using chlorine or bromine as a pool / spa sanitizer, test the water around the heat pump using a test strip. If the test strip indicates that chlorine or bromine is present, a leak may exist.