What is indicated by a high air pressure indicator light and stopped blower motors?

A high air pressure indicator light combined with stopped blower motors suggests that the air supply valves to the aeration basins are likely throttled back or closed completely. In a properly operating system, the blower motors should create sufficient air flow, resulting in a normal range of pressure readings. If the blower motors are not running, no air is being supplied, which would cause an inappropriate pressure condition.

When air supply valves are fully open, the system would be experiencing normal or positive pressure, indicating adequate air supply. In contrast, the presence of high air pressure along with non-functional blower motors signifies that air is not being actively delivered, leading to an abnormal pressure situation likely caused by restricted air flow due to closed or partially closed valves. Therefore, option B accurately reflects the condition indicated by the scenario presented.