Patent ID: 8453674

Claim:
A method of indicating a fault associated with a fluid valve moveable between an open and a closed operative position, the method comprising: receiving a valve change indication in a logic processor; initiating a delay timer to generate a predetermined time delay if the valve change indication is a change in a valve last command received from a valve command processor; bypassing the delay timer if the valve change indication is a change in a valve state indicator received from a valve sensor; comparing a mostly recently received valve state indicator to a most recently received valve last command, said comparison being done after the predetermined time delay generated by the valve timer if the valve change indication is a change in a valve last command received from a valve command processor, wherein the valve state indicator represents a detected operative position of the valve, the valve last command being an operative command sent to the fluid valve; and cutting off power to the fluid valve when the mostly recently received valve state indicator does not match the mostly recently received valve last command.