A refrigeration cycle apparatus comprising: a heating unit that comprises: a compressor that compresses and discharges refrigerant; and a condenser that condenses refrigerant that has been discharged from said compressor; a refrigerating unit that includes: a decompressing apparatus that decompresses refrigerant that flows out from said condenser; and an evaporator that evaporates refrigerant that flows out from said decompressing apparatus; liquid-side crossover piping and gas-side crossover piping that connect said heating unit and said refrigerating unit; liquid-side refrigerant piping that connects said condenser and said liquid-side crossover piping; and gas-side refrigerant piping that connects said compressor and said gas-side crossover piping, said refrigerant being sealed inside a main refrigerant circuit that passes from said compressor through said condenser, said liquid-side refrigerant piping, said liquid-side crossover piping, said decompressing apparatus, said evaporator, said gas-side crossover piping, and said gas-side refrigerant piping, and returns to said compressor, wherein said refrigeration cycle apparatus further comprises: liquid-side connection piping that extends from said liquid-side refrigerant piping or said liquid-side crossover piping; gas-side connection piping that extends from said gas-side refrigerant piping or said gas-side crossover piping; a refrigerant storage tank that is capable of storing said refrigerant, an intake side thereof being connected to said liquid-side connection piping, and a discharge side thereof being connected to said gas-side connection piping; an inlet-side electromagnetic valve that is disposed on said liquid-side connection piping, and that is in open state when there is no passage of electric current; an inlet-side check valve that is disposed on said liquid-side connection piping, and that allows said refrigerant to flow only toward said refrigerant storage tank; and a valve apparatus that is disposed on said gas-side connection piping, characterized in that the refrigeration cycle apparatus is configured to keep said valve apparatus opened during passage of electric current to said inlet-side electromagnetic valve, and in that the refrigeration cycle apparatus is further configured to delay shut-off of said valve apparatus after passage of electric current to said inlet-side electromagnetic valve is stopped. a heating unit that comprises: a compressor that compresses and discharges refrigerant; and a condenser that condenses refrigerant that has been discharged from said compressor; a compressor that compresses and discharges refrigerant; and a condenser that condenses refrigerant that has been discharged from said compressor; a refrigerating unit that includes: a decompressing apparatus that decompresses refrigerant that flows out from said condenser; and an evaporator that evaporates refrigerant that flows out from said decompressing apparatus; a decompressing apparatus that decompresses refrigerant that flows out from said condenser; and an evaporator that evaporates refrigerant that flows out from said decompressing apparatus; liquid-side crossover piping and gas-side crossover piping that connect said heating unit and said refrigerating unit; liquid-side refrigerant piping that connects said condenser and said liquid-side crossover piping; and gas-side refrigerant piping that connects said compressor and said gas-side crossover piping, said refrigerant being sealed inside a main refrigerant circuit that passes from said compressor through said condenser, said liquid-side refrigerant piping, said liquid-side crossover piping, said decompressing apparatus, said evaporator, said gas-side crossover piping, and said gas-side refrigerant piping, and returns to said compressor, liquid-side connection piping that extends from said liquid-side refrigerant piping or said liquid-side crossover piping; gas-side connection piping that extends from said gas-side refrigerant piping or said gas-side crossover piping; a refrigerant storage tank that is capable of storing said refrigerant, an intake side thereof being connected to said liquid-side connection piping, and a discharge side thereof being connected to said gas-side connection piping; an inlet-side electromagnetic valve that is disposed on said liquid-side connection piping, and that is in open state when there is no passage of electric current; an inlet-side check valve that is disposed on said liquid-side connection piping, and that allows said refrigerant to flow only toward said refrigerant storage tank; and a valve apparatus that is disposed on said gas-side connection piping, characterized in that the refrigeration cycle apparatus is configured to keep said valve apparatus opened during passage of electric current to said inlet-side electromagnetic valve, and in that the refrigeration cycle apparatus is further configured to delay shut-off of said valve apparatus after passage of electric current to said inlet-side electromagnetic valve is stopped.