An air conditioning apparatus including a refrigerant circuit, the air conditioning apparatus comprising: a first device of a plurality of safety devices including at least two types of a refrigerant detector, an alarm device, an isolation valve, and a ventilation device; a second device of a type different from the first device of the plurality of safety devices; a connecting portion including a first electric wire connecting portion and a second electric wire connecting portion; a first electric wire connected to the first device and to the first electric wire connecting portion; a second electric wire connected to the second device and to the second electric wire connecting portion; a control unit (22, 44); a circuit configuration portion including a first portion that electrically connects the first electric wire connecting portion to the control unit (22, 44), a second portion that electrically connects the second electric wire connecting portion to the control unit (22, 44), and a coupling portion that electrically connects the first electric wire connecting portion to the second electric wire connecting portion; an interlock circuit (98, 98a, 98b) formed by the circuit configuration portion together with the first electric wire and the second electric wire connected to the connecting portion; a first member that enables formation of a first circuit (99, 99a, 99b) including at least part of the circuit configuration portion without going through the first electric wire and the second electric wire; wherein the first circuit (99, 99a, 99b) is a circuit formed by short-circuiting the first portion of the circuit configuration portion and the second portion of the circuit configuration portion, and wherein the control unit (22, 44) is configured to prohibit an operation of the air conditioning apparatus when no current flows through either the interlock circuit or the first circuit. a first device of a plurality of safety devices including at least two types of a refrigerant detector, an alarm device, an isolation valve, and a ventilation device; a second device of a type different from the first device of the plurality of safety devices; a connecting portion including a first electric wire connecting portion and a second electric wire connecting portion; a first electric wire connected to the first device and to the first electric wire connecting portion; a second electric wire connected to the second device and to the second electric wire connecting portion; a control unit (22, 44); a circuit configuration portion including a first portion that electrically connects the first electric wire connecting portion to the control unit (22, 44), a second portion that electrically connects the second electric wire connecting portion to the control unit (22, 44), and a coupling portion that electrically connects the first electric wire connecting portion to the second electric wire connecting portion; a first portion that electrically connects the first electric wire connecting portion to the control unit (22, 44), a second portion that electrically connects the second electric wire connecting portion to the control unit (22, 44), and a coupling portion that electrically connects the first electric wire connecting portion to the second electric wire connecting portion; an interlock circuit (98, 98a, 98b) formed by the circuit configuration portion together with the first electric wire and the second electric wire connected to the connecting portion; a first member that enables formation of a first circuit (99, 99a, 99b) including at least part of the circuit configuration portion without going through the first electric wire and the second electric wire; wherein the first circuit (99, 99a, 99b) is a circuit formed by short-circuiting the first portion of the circuit configuration portion and the second portion of the circuit configuration portion, and wherein the control unit (22, 44) is configured to prohibit an operation of the air conditioning apparatus when no current flows through either the interlock circuit or the first circuit.