Doing some Aquacal heat pump troubleshooting?

These Aquacal heat pump error code explanations will help you fix some of the most common AquaCal pool heater problems:

AquaCal Heat Pump Error Codes

AquaCal heat pump error code FLO

(My Aquacal heat pump says FLO)

FLO

What it means: sensors are detecting low water levels in the heat pump

How to fix it:

• Check that pool pump is receiving enough water
• Ensure that your pool pump is sending water to the heat pump
• For variable speed pool pumps, try putting the pump speed up a notch
• Check for any clogs or backups causing poor water circulation

AquaCal heat pump error code CEr

CEr

What it means: a communication cable may be damaged or disconnected

How to fix it:

• Have a professional pool heat pump repair tech inspect your pump and circuit boards to resolve the issue
• Consider over-the-phone, DIY pool heater troubleshooting

Aquacal heat pump error code CSE

CSE

What it means: this code indicates an error within the control system

How to fix it:

• Reset heat pump: Turn off power at the breaker, wait a few minutes, then turn power back on

Aquacal heat pump error code dPC | dPO

dPC | dPo

What it means: the defrost sensor may be disconnected or shorted

How to fix it:

• Have a professional pool heat pump repair technician inspect the sensor, and replace if defective
• Perform the repair with professional guidance from a pool heater troubleshooting service

Aquacal heat pump error code PC | PO

PC | PO

What it means: the water sensor may be disconnected or shorted

How to fix it:

• Have a professional pool heat pump repair technician inspect the sensor, and replace if defective
• Perform the repair with professional guidance from a pool heater troubleshooting service

Aquacal heat pump error code HP

HP

What it means: high-pressure sensor in refrigerant system may be open

How to fix it:

• Try FLO error code troubleshooting steps
• Seek professional assistance to recalibrate your water pressure switch
• Hire a pool heat pump repair technician to resolve the issue

Aquacal heat pump error code HPS

HPS

What it means: heat pump is locked due to 5 consecutive high-pressure faults in once cycle

How to fix it:

• Power off the heat pump to clear the error code
• Try HP error code troubleshooting steps

Aquacal heat pump error code LP

LP

What it means: low-pressure sensor in refrigerant system may be open

How to fix it:

• Try HP error code troubleshooting steps

Aquacal heat pump error code LPS

LPS

What it means: heat pump is locked due to 5 consecutive low-pressure faults in once cycle

How to fix it:

• Power off the heat pump to clear the error code
• See LP error code troubleshooting

Aquacal heat pump error code OtA

OtA

What it means: temperature of incoming water exceeds 110 degrees; heat pump locked

How to fix it:

• Measure the temperature of your water with a thermometer and see if it matches pool heater reading. This tests for a faulty temperature sensor
• Check that there isn’t another heat source warming up your water
• Seek pool heater troubleshooting help