Some common issues that can be identified through commissioning a refrigeration system include incorrect refrigerant charging, improper system sizing, inadequate insulation, and faulty or malfunctioning sensors or controls. Commissioning can also identify issues related to system design or layout, such as inadequate airflow or water flow, which can impact system performance and energy efficiency. By identifying and addressing these issues, commissioning can help to optimize system performance, reduce energy costs, and extend the lifespan of the equipment.