Control device and method for controlling a heat pump system

The invention relates to a method for controlling a heat pump system having a heat source, a utility and / or heating water circuit, a compressor, an evaporator and a condenser, the method comprising the steps of: - detecting a discharge temperature of the compressor; - comparing the sensed discharge temperature with a predetermined maximum hot gas temperature, and in the case of reaching the maximum hot gas temperature: - outputting a signal for turning off the compressor; - capture the return temperature, and - matching the detected return temperature with a predetermined minimum reflux temperature.