Heat pump unit, anomaly workaround heating method, and non-volatile computer-readable recording medium

Abstract

Controller () for heat pump unit () according to an exemplary embodiment includes information acquisition unit () configured to acquire an inflow water temperature indicating a temperature of water flowing out of hot water tank () into heater (), and an outflow water temperature indicating a temperature of the water flowing out of heater () toward hot water tank (). Controller () further includes normality determination unit () configured to determine whether a storage water temperature indicating a temperature of the water inside hot water tank () is being acquired properly. Controller () further includes setting value update unit () configured to update a target storage water temperature to be achieved in hot water tank () by the heating operation to a higher value when normality determination unit () determines that the storage water temperature is not being acquired properly or there is a possibility that the storage water temperature is not being acquired properly, and a temperature difference between the outflow water temperature and the inflow water temperature is less than a temperature difference threshold.