| 摘要 |
The present invention is directed to a fuel cell system having fuel cells, a supply flow path for allowing a fuel gas, which is supplied from a fuel supply source, to flow to the fuel cells; a variable gas supply device for regulating a gas condition on the upstream side of the supply flow path and supplying the regulated gas to the downstream side; a first control device for driving and controlling the variable gas supply device; an off-gas flow path capable of releasing a fuel off-gas, discharged from the fuel cells, to the outside through a discharge valve; a second control device for driving and controlling the discharge valve; and a defect detection device for detecting a defect of the discharge valve. By using a gas supply command amount for the variable gas supply device, the defect detection device detects a valve opening defect that the discharge valve does not return from an open state to a closed state.
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