Air-conditioning apparatus

An air-conditioning apparatus comprising:

• a refrigerant circuit including a compressor, a heat-source-side heat exchanger, an expansion device, a heat medium heat exchanger, and a shut-off valve connected in sequence by pipes to allow refrigerant to flow therethrough;
• a heat medium circuit including a pump, the heat medium heat exchanger, a heat medium flow control device, and a load-side heat exchanger connected in sequence by pipes to allow a heat medium to flow therethrough;
• a heat-source-side air-sending device configured to send air to the heat-source-side heat exchanger;
• a leakage detecting unit configured to detect refrigerant leakage;
• and
• a controller configured to perform cooling operation,
• wherein the controller is configured to, if the leakage detecting unit detects refrigerant leakage during cooling operation, close the shut-off valve after lowering an operation frequency of the compressor and increasing a rotation speed of the heat-source-side air-sending device.