Fault Codes

A fault code indicates a specific issue or condition that will require action before the equipment can resume operating.

Please perform the following troubleshooting.

If the issue reoccurs, please contact AquaCal.

WARNING

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

 

  • Repairs must not be attempted by untrained or unqualified individuals.
  • The heat pump contains refrigerant under high pressure. Repairs to the refrigerant circuit must not be attempted by untrained or unqualified individuals. Service must be performed only by qualified HVAC technicians. Recover refrigerant before opening the system.

NOTICE

Failure to heed the following may result in damage to equipment.

 

  • Service by unauthorized personnel will void the heat pump warranty.

ClosedFLOW LED is off

ISSUE

Low or no water detected.

RESOLUTION

    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 the maximum flow rate for your model.
    3. Confirm water is not being diverted away from the heat pump.

ClosedDEFROST LED is on

ISSUE

The heat pump has sensed the evaporator coil is icing up.

RESOLUTION

PASSIVE DEFROST

When ice starts to form on the coil, the compressor will stop operating while the fan continues to operate.

  • When the coil's temperature rises above 38° F, the compressor is restarted and heating or cooling resumes.
  • If the coil's temperature remains below 38° F, the compressor will remain off.

ClosedFAULT LED is rapidly blinking (Control panel unresponsive)

ISSUE

The heat pump firmware needs to be reloaded on the control board.

RESOLUTION

  1. If the heat pump is connected to a PoolSync® WI-FI controller and is connected to the internet, the heat pump will automatically perform a firmware recovery.
  2. If no PoolSync® WI-FI controller is connected, the heat pump will require service from a qualified technician.

ClosedFAULT LED is blinking 1 time

ISSUE

The refrigerant system’s high-pressure or low-pressure switch is showing as open.

RESOLUTION

Determine if an insufficient amount of water is being supplied to the equipment.

  1. Confirm the filter pump is on.
  2. If a multiple-speed filter pump is being used, run filter pump at a higher speed. Do not exceed maximum flow rate for the model.
  3. Confirm water is not being diverted away from the heat pump.
  4. The water pressure switch may be incorrectly calibrated. See "Adjusting Water Pressure Switch" for more information.

ClosedFAULT LED is blinking 2 times

ISSUE

The heat pump has locked due to five high-pressure or five low-pressure faults during one call for heating or cooling.

RESOLUTION

  1. Deactivate power to heat pump, wait five seconds, then reactivate power to the heat pump to clear error.
  2. Troubleshoot the high-pressure issue causing the error. See "FAULT LED is blinking 1 time".

ClosedFAULT LED is blinking 3 times

ISSUE

Incoming water temperature exceeded 108° F and the unit is locked with a high temperature fault. The heat pump will not operate until incoming water temperature drops to 100° F or lower.

RESOLUTION

  1. Determine if another heat source (gas heater, solar heater, etc.) is heating water being sent directly to the heat pump. This situation will need to be corrected before continuing.
  2. Rule out an incorrect reading from the water temperature sensor. Verify existing water temperature with an accurate thermometer. If heat pump's sensor is inaccurate, the water temperature sensor may require replacement.

ClosedFAULT LED is blinking 4 times

ISSUE

Shorted or open water sensor 1.

RESOLUTION

A qualified technician should replace the water sensor.

ClosedFAULT LED is blinking 5 times

ISSUE

Shorted or open water sensor 2.

RESOLUTION

A qualified technician should replace the water sensor.

ClosedFAULT LED is blinking 6 times

ISSUE

Shorted or open defrost sensor 1.

RESOLUTION

A qualified technician should replace the defrost sensor.

ClosedFAULT LED is blinking 7 times

ISSUE

Shorted or open defrost sensor 2.

RESOLUTION

A qualified technician should replace the defrost sensor.