The heat pump is not reaching the supply temperature: potential causes

If the water temperature consistently remains below the setpoint, the problem may lie either in the unit itself or the building load.

Insufficient power available

At very low outdoor temperatures, the actual capacity of the pump may be lower than the thermal load.

High setpoint

A very high required supply temperature reduces the COP and may push the unit close to its operating limits.

Hydraulic problem

Incorrect water flow, bypass, or poor hydraulic layout can distort temperatures.

Refrigerant circuit

If the unit is not producing the expected output, check pressures, sensors, expansion valve, and inverter operation.