| 摘要 |
To provide a safe refrigeration cycle apparatus which uses a flammable refrigerant and in which the flammable refrigerant is prevented from, for example, igniting with the flame of, for example, a burner during replacement of a component of the refrigeration cycle apparatus. Disclosed is a method for replacement of a part of a refrigeration cycle apparatus 100 including a compressor 10, a heat source side heat exchanger 12, an expansion device 16, a heat exchanger related to heat medium 15, and first and second refrigerant flow closing devices 29a and 29b, the compressor 10, the heat source side heat exchanger 12, the expansion device 16, and the heat exchanger related to heat medium 15 being connected by pipes to form a refrigerant circuit A, the first and second refrigerant flow closing devices controlling a flow of a refrigerant into and out of an outdoor unit 1 accommodating the compressor 10 and the heat source side heat exchanger 12. The method includes a pump-down step of closing the first refrigerant flow closing device 29a during operation, allowing the refrigerant in a pressure reduction section excluding the outdoor unit 1 to flow into the outdoor unit 1 so as to be recovered therein, and reducing a pressure in the pressure reduction section until the pressure reaches a set pressure or a setting time is reached, a flow closing step of closing the second refrigerant flow closing device 29b, and a part replacement step of removing the part from the refrigerant circuit by heating to replace the part. |
