If the timing pump does not run and the pasteurization temperature controller indicates forward flow, what could be the issue?

When considering the scenario where the timing pump is not operating yet the pasteurization temperature controller shows forward flow, examining the potential issue of the divert valve micro switch being out of alignment is critical.

In a pasteurization system, the divert valve is responsible for directing the flow of product through either the pasteurization section or allowing it to bypass it for safety reasons if certain conditions are not met. If the micro switch that controls the divert valve is misaligned, it could inadvertently signal that the pasteurization section is ready for flow even when the timing pump fails to operate. This miscommunication might result in the temperature controller displaying forward flow when, in reality, the system is not functioning correctly.

This scenario emphasizes the importance of the alignment of control devices in ensuring proper system operation. The other potential issues like the timing pump malfunctioning, the pasteurization temperature recorder being disconnected, or the raw milk inflow valve being closed could impact the system but do not directly connect the false indication of forward flow with the timing pump not running. Thus, recognizing the role of the divert valve micro switch is crucial in diagnosing the problem.