What is indicated if an electric motor driving a compressor suddenly shows a very low amp draw?

A very low amp draw on an electric motor driving a compressor typically indicates that the motor is not experiencing the load it is designed to handle. In the context of this scenario, the correct answer implies that the inlet is throttled. When the inlet of a compressor is partially or fully restricted, it limits the flow of air or refrigerant into the compressor, which causes the motor to draw less current as it has less work to perform. This reduced load results directly in a lower amp draw.

A throttled inlet means that there is insufficient fluid entering the compressor, leading to reduced efficiency and performance. The motor will draw less current because it is not working as hard to compress a lower volume of fluid.

This situation is crucial to recognize since consistent low amp draw could lead to further operational issues, including potential damage to the compressor or other system components if not addressed. Understanding this relationship helps in diagnosing system performance and ensuring efficient operation in industrial settings.