Which position should the controller selector switch be in?

Which position should the controller selector switch be in?

• A. Auto
• B. Manual
• C. Off
• D. Run

Answer: (B)

Placing the controller selector switch in Manual gives you full, independent control of starting and stopping the pump. For a run test, you want to observe how the pump behaves when you initiate a start action yourself and then watch it run under direct operator control. If it were in Auto, the pump could start automatically from the protection signals, which can complicate the test or mask how the pump responds to a manual start. Off would disable operation, and Run is used when the pump is already running, not when you’re testing the start/stop sequence. So Manual is the best setting for a controlled run test.

Placing the controller selector switch in Manual gives you full, independent control of starting and stopping the pump. For a run test, you want to observe how the pump behaves when you initiate a start action yourself and then watch it run under direct operator control. If it were in Auto, the pump could start automatically from the protection signals, which can complicate the test or mask how the pump responds to a manual start. Off would disable operation, and Run is used when the pump is already running, not when you’re testing the start/stop sequence. So Manual is the best setting for a controlled run test.