Refrigeration cycle apparatus

A refrigeration cycle apparatus, comprising:

• a refrigeration cycle circuit connecting a compressor, a refrigerant flow switching device, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, the refrigeration cycle circuit being configured to circulate refrigerant;
• a first junction portion provided between the outdoor heat exchanger and the expansion valve, the first junction portion being configured to divide the refrigerant;
• a second junction portion provided between the indoor heat exchanger and the refrigerant flow switching device, the second junction portion being configured to divide the refrigerant;
• a bypass pipe connecting the first junction portion and the second junction portion, the bypass pipe being configured to cause the refrigerant to flow through the bypass pipe;
• a first valve provided between the second junction portion and the refrigerant flow switching device;
• a second valve provided to the bypass pipe;
• a first temperature sensor configured to measure a temperature in a room to which air passing through the indoor heat exchanger is provided;
• a second temperature sensor configured to measure a temperature of refrigerant at a liquid portion of the indoor heat exchanger;
• and
• a controller configured to control devices included in the refrigeration cycle circuit,
• in an operation status in which the expansion valve is fully closed, the first valve is opened, and the second valve is closed,
• in a case in which the controller controls the compressor such that the compressor causes a pressure of the refrigerant on a low-pressure side of the refrigeration cycle circuit to approach a target low-pressure-side pressure,
• when the pressure of the refrigerant on the low-pressure side and the target low-pressure-side pressure are different from each other,
• the controller being configured to detect an abnormality at the second valve.

A refrigeration cycle apparatus, comprising:

• a refrigeration cycle circuit connecting a compressor, a refrigerant flow switching device, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, the refrigeration cycle circuit being configured to circulate refrigerant;
• a first junction portion provided between the outdoor heat exchanger and the expansion valve, the first junction portion being configured to divide the refrigerant;
• a second junction portion provided between the indoor heat exchanger and the refrigerant flow switching device, the second junction portion being configured to divide the refrigerant;
• a bypass pipe connecting the first junction portion and the second junction portion, the bypass pipe being configured to cause the refrigerant to flow through the bypass pipe;
• a first valve provided between the second junction portion and the refrigerant flow switching device;
• a second valve provided to the bypass pipe;
• a first temperature sensor configured to measure a temperature in a room to which air passing through the indoor heat exchanger is provided;
• a second temperature sensor configured to measure a temperature of refrigerant at a liquid portion of the indoor heat exchanger;
• and
• a controller configured to control devices included in the refrigeration cycle circuit,
• in an operation status in which the expansion valve is fully closed, the first valve is opened, and the second valve is closed,
• in a case in which the controller controls the compressor such that the compressor causes a pressure of the refrigerant on a high-pressure side of the refrigeration cycle circuit to approach a target high-pressure-side pressure,
• when the pressure of the refrigerant on the high-pressure side and the target high-pressure-side pressure are different from each,
• the controller being configured to detect an abnormality at the second valve.