It is primarily associated with the IM 1287 manual and service series.

Because it is a ".part6" file, it cannot be opened or extracted on its own. You must have all preceding parts (part1 through part5) in the same folder to successfully rebuild the original file. Contents and Equipment Details

The file is the sixth segment of a multi-part compressed archive related to the Rebel Applied (DPSA) series of industrial HVAC equipment , specifically manufactured by Daikin Applied.