If the normally open contacts on the control board fail to make contact when they need to, what happens?

In this context, if the normally open contacts on the control board fail to make contact when needed, the correct outcome is that the unit will remain inactive. Normally open contacts are designed to complete a circuit when the control signal is present; if they do not close as intended, the circuit remains open. As a result, the equipment will not receive the necessary power or signal to initiate operation, leading to the unit being inactive.

Understanding the implications of failing contacts is crucial in electrical control systems. When these contacts do not engage, it prevents the unit from functioning properly, which in this case leads to inaction. Therefore, recognizing the role of normally open contacts, particularly how they control the flow of power to the unit, helps clarify why the equipment would not move to engage or fill operation under these conditions.