Patent ID: 8245525

Claim:
A heat source apparatus comprising: an electric compressor that is driven by an inverter device and that compresses a refrigerant, the inverter device having a protective function that performs stoppage for device protection on the basis of a predetermined calculation by an inverter control portion; a condenser that condenses the refrigerant compressed by the electric compressor; an expansion valve that expands the refrigerant condensed by the condenser; an evaporator that evaporates the refrigerant expanded by the expansion valve; and a control device that controls at least one of cold output and heat output, wherein the control device includes an inverter-protective-function estimating unit that estimates a calculation result of the protective function of the inverter control portion; wherein the inverter-protective-function estimating unit calculates the predetermined calculation, which is performed in the inverter control portion, in a parallel fashion in the control device; and wherein the control device communicates with the inverter control portion and provides the inverter control portion with an instruction to control the electric compressor.