Patent ID: 7853416

Claim:
A flow rate verification failure diagnosis apparatus comprising: a gas supply pipe system including: flow rate control devices; and a flow rate verification unit having a pressure measurement device, the flow rate verification unit detecting flow rate abnormality by measuring a flow rate of fluid in each of the flow rate control devices on the basis of pressure of the fluid measured by the pressure measurement device; and a failure diagnosis device having a mode to diagnose a failure in the pressure measurement device in a case of the flow rate verification unit detecting the flow rate abnormality; a gas box for storing the flow rate control devices and the flow rate verification unit; a gas box temperature measurement device for measuring temperature in the gas box; and a temperature change failure diagnosis device for determining flow rate abnormality occurring due to temperature change in the gas box in a case where the flow rate verification unit detects the flow rate abnormality in any of the flow rate control devices and where temperature measured by the gas box temperature measurement device changes.