Here is a question related to the M7020 and KM-ASSYH1-03 error codes:

What does the M7020-There is product in the left pressing area when starting machine code error code indicate, and how can it be resolved?

The M
The solution for the error described as M7020-"There is product in the left pressing area when starting" is to move any obstructions or product out of the left pressing area of the printer before attempting to start the print job.