Model number p005cf1301424 how to open without combination

SOURCE: model 1011... door opens without

"If your lock is opening on every turn of the knob or lever, except upon entering a code, this may be a ZERO CODE. Before attempting to remove the lock from the door, refer to the troubleshooting procedures outlined at bottom of this document for a zero code symptom/solution

Solution: Follow the procedure for changing a combination except omit step 3 (do not enter
the existing combination)."

I excerpted the above from the full instructions on how to change the code. If you don't have them, got to this link:

http://www.kaba-ilco.com/access_control/literature/literature_grid_mechanical_pushbutton_locks.aspx?id=13

and go across from L1000 to the last column, "Tips".
When you hover your mouse over PDF, two choices will appear; left click on the upper one, "Changing the code/..." to download it.
The download will be a PDF file format. If you are unable to open it, you will need to download and install Adobe Reader on your computer. There is a link (Get Adobe Reader) at the top right of the literature grid.
When you do get the download open, you will have the stepwise procedure and illustrations necessary-but don't forget to omit Step 3, if you believe that you have the ZERO code problem!

Good luck--and please provide feedback if this helps!