Troubleshooting C2U - Refrigerant Sensor Communication Failures

If the refrigerant sensor communication fault (code C2U) occurs, it indicates a failure in communication between the refrigerant sensor and the mainboard. To resolve this, first check the wire connections between the refrigerant sensor and the mainboard to ensure they are secure and undamaged. Loose or damaged wiring is a common cause of this fault. If the wiring is intact, the sensor itself may be faulty and require replacement. Please contact us via the service desk or Support@heatpumps4pools.com