Daikin · Simple Self Diagnosis by Malfunction Code | Daikin
The high-pressure switch (HPS) has activated, indicating that the pressure within the outdoor unit's refrigerant system is too high.
Click steps to track your progress.
Turn off the unit.
Ensure both indoor and outdoor unit air filters/coils are clean and unobstructed.
Restore power.
If the code returns, have the refrigerant levels and pressure switch checked by a professional.