Fault diagnosis method and device for air conditioner

The invention provides a fault diagnosis method and device for an air conditioner. The method comprises the following steps that a diagnosis object selection signal is acquired; a target diagnosis object is determined according to the diagnosis object selection signal, wherein the target diagnosis object is at least a part of components of the air conditioner; operation information required for performing fault diagnosis on the target diagnosis object is acquired; whether the target diagnosis object breaks down or not and a fault type under the fault condition are determined according to the operation information. The diagnosis object selection signal is acquired, the target diagnosis object is determined according to the diagnosis object selection signal, whether the target diagnosis object breaks down or not and the fault type under the fault condition are determined according to the operation information, the target diagnosis object is selected according to needs, blind diagnosis onall the components of the air conditioner is avoided, and the diagnosis efficiency is improved; moreover, the target diagnosis object is selected according to the diagnosis object selection signal, so that the range of the target diagnosis object is narrowed, and the accuracy of fault diagnosis is improved.