(57) Abstract Objective Forcing by the fan which consists of the multiple fansIn air cooling, when the fan breaks down, the fan which breaks downThe maintenance which corresponds to breakdown position by specifying, columnu. Constitution Beforehand breakdown position of fan 1,2,3,4Fan fault detection pattern in order to detect is set,It is fan breakdown position pattern storage section 9 and the multiple fansWhen the breakdown of one or more inside is generated, breakdown is detectedAllah of alarm signal and other fan of breakdown of me fanIt inputs the mu signal and fan breakdown position detection pattern, breaks downIt is the fan breakdown position sensing station 10 which specifies the fan and the emptyIt is constituted.
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