FAN FAULT DETECTION DEVICE

Embodiments of the present invention relate to a fan fault detection device, wherein the fan fault detection device includes: a plurality of sub-modules; and a master module determining faults of a plurality of fans. Each of the plurality of sub-modules may include: a first input terminal receiving a detection signal indicating whether a corresponding fan has failed from the corresponding fan; a second input terminal; an output terminal; a switching circuit connected between a first power source supplying a voltage signal corresponding to a state signal and the output terminal, and switching an output of the state signal through the output terminal according to the detection signal; and a first signal transmission circuit connected between the first input terminal and the switching circuit, and transmitting the detection signal to the switching circuit according to a signal received by the second input terminal. In a first sub-module of the plurality of sub-modules, the second input terminal may be connected to the first power source, and in the other sub-modules, the second input terminal may be connected to the output terminal of a previous sub-module; and in a second sub-module of the plurality of sub-modules, the output terminal may be connected to the master module.