Common troubleshooting issues in hydroponic irrigation systems include clogged emitters or pumps, incorrect pH or EC levels, and root bound or nutrient deficiencies. These issues can be addressed by regularly inspecting and cleaning the system, monitoring water quality and nutrient levels, and adjusting system settings as needed. Additionally, growers should be aware of signs of disease or pests, such as yellowing leaves or white powdery residue, and take prompt action to address these issues. By identifying and addressing problems early, growers can prevent crop losses and ensure optimal plant growth.