What troubleshooting method prioritizes checking the actuator first, then FCV, and then DCV?

The method that prioritizes checking the actuator first, followed by the Flow Control Valve (FCV), and then the Directional Control Valve (DCV) is known as the Output-Back troubleshooting method. This approach focuses on analyzing the system by starting at the output end, which is the actuator, and subsequently working backward through the components that influence its operation.

The rationale behind this method is that the actuator is the final component in the chain responsible for performing the desired mechanical action. By assessing the actuator first, technicians can confirm whether the output is functioning correctly. If the actuator is not operating as required, it indicates a potential problem that may either reside within the actuator itself or could be influenced by preceding components, such as the FCV or DCV. This logical progression allows for efficient identification of issues, preventing unnecessary checks on components that may not be the source of the problem if the actuator is already functional.

In addition, understanding the order of component interaction is crucial, as diagnosing from output to input can save time and lead to faster resolution of issues. Where other methods may start from the source of initiation or follow a different path, the Output-Back approach remains effective in ensuring that the primary operational element is thoroughly assessed before moving up the system hierarchy