The invention discloses an indoor unit
refrigerant leak detection control method of a multi-connected air conditioner and related equipment, and can be applied to the technical field of air conditioners. After the indoor units and the outdoor unit are connected through the connecting pipes, the first
pressure sensor and the
electronic expansion valve are arranged on the first indoor unit connecting
pipe of each indoor unit, the second
pressure sensor and the
electromagnetic valve are arranged on the second indoor unit connecting
pipe of each indoor unit, and the
refrigerant concentration sensor is arranged in each indoor unit; when the multi-connected air conditioner is in the working process, the real-time
refrigerant concentration, detected by the refrigerant concentration sensor, in each indoor unit is obtained, so that manual detection is not needed, the
workload of workers is effectively reduced, then the on-off states of the electronic expansion valves and the electromagnetic valves on the corresponding indoor units are controlled according to the first real-time refrigerant concentration, and the on-off states of the electronic expansion valves and the electromagnetic valves on the corresponding indoor units are controlled according to the second real-time refrigerant concentration. And
fault analysis is performed on the multi-connected air conditioner by combining the pipeline pressure value detected in real time on the indoor unit to obtain a
fault analysis result, so that the working state of the multi-connected air conditioner is controlled, and the user experience is improved.