Which of the following conditions would be the most probable cause for the 'low oil temperature after preheater' LED indicators, as shown in the illustration, to be illuminated? MO-0127

Correct Answer: Option D — Incorrect steam control valve setting.

A low oil temperature alarm after the preheater stems directly from inadequate thermal energy transfer, most commonly caused by an incorrect steam control valve setting failing to supply sufficient heating steam to meet the automated temperature controller demand.