How to do diagnostic test??

Hi. I have attached a video that shows how to get into the diagnostic mode. It shows how to run a test mode as well as calibration. If you need to check error codes, once your into diagnostic mode, with only the done light lit up press start and now your in the error code section. I have also attached the tech sheet for this unit. It has the same instructions on the diagnostic mode as well as lists all of the error codes.