Solving frost or ice issues with a walk-in freezer is generally not difficult but will require a thorough inspection to find the root cause of the issue.
Data recording can help less experienced technicians troubleshoot refrigeration systems. Quickly and accurately determining the cause of a system problem is beneficial to both the equipment owner and the servicing contractor, and experience can be a major factor in a technician's ability to troubleshoot systems with greater precision.
Technicians need to understand the basic electrical fundamentals and how they relate to each other in order to better troubleshoot electrical failures.
Troubleshooting refrigeration systems can be complex and frustrating, so put aside any assumptions and inspect the system thoroughly before making any diagnosis.