For which scenarios could the manufacturer's manual be considered approved data for an appliance?

The manufacturer's manual is considered approved data for both major repairs and major alterations because it provides essential specifications, instructions, and methods that have been officially sanctioned by the manufacturer. This authority ensures that any work performed on the appliance meets the safety and performance standards set forth during the design and testing phases.

Major repairs involve substantial work that significantly affects the structure, performance, or durability of the appliance, while major alterations may change its intended use or increase its capabilities. In these scenarios, using the manufacturer's manual ensures compliance with regulatory standards and enhances the reliability of the work being performed.

In contrast, minor repairs typically do not require extensive documentation or detailed procedures from the manufacturer, as they often involve routine maintenance tasks that do not significantly alter the appliance's core functions. Thus, the manual is not necessary in those instances.