What condition does the AMCOP enter if both main line power sources are lost?

When both main line power sources are lost, the AMCOP (Automatic Motor Control and Operations Panel) enters an auto fail condition. This occurs because the device is designed to monitor the availability of power sources for the operational integrity of the system. In the event of a power loss, the system must detect this condition to ensure safety and functionality.

Entering an auto fail condition typically means that the appliance or system moves to a state where it can perform controlled shutdown procedures, alert operators, or switch to backup systems if they are available. This condition is critical because it prevents unexpected behavior of machinery and systems that could lead to damage or safety hazards.

In contrast, normal operation mode would imply that power is available, while manual override mode suggests an active manual control of functions, neither of which would accurately reflect the situation of being without power. Diagnostic mode would indicate that the system is checking its own integrity or performance, which is also not applicable during a total power loss. Thus, the auto fail condition is the correct response to the situation described.