Heat pump device

A heat pump device comprising:

• a refrigerant circuit that includes a compressor and in which a refrigerant circulates;
• a water circuit in which water circulates, that includes a flow adjustor that adjusts a flow of the water, and that produces heated water by heat exchange of the water with the refrigerant;
• and
• a terminal that is connected to the water circuit,
• wherein the heat pump device includes:
• a first detector that detects a condensing pressure of the refrigerant of the refrigerant circuit;
• a second detector that detects a discharged heated-water temperature that is a temperature of the water flowing into the terminal;
• and
• a controller that executes a protection operation of adjusting the condensing pressure of the refrigerant when the condensing pressure that is detected by the first detector exceeds a pressure threshold, and
• the controller selects, as a subject of control in the protection operation, any one of the compressor and the flow adjustor based on the discharged heated-water temperature that is detected by the second detector.