Not sure why you’re using access codes. You mentioned that the printer is multi-function. Are the codes for outbound faxing? This is what i found on the mfg website:
Error – ”Access Restricted”
Question: Why do I receive a “Access Restricted” message?
Answer: The message “Access Restricted” can appear if you have your machine set for User Codes to ON for the Printer and a print job is sent without a User Code. You can change this by perfoming the following:
Select User Tools key on the machine
Select System Settings button
Select Key Operator Tools tab
Select User Code Management button and set Printer to either Off or Auto Program. Auto Program allows the printing with and with out User Codes.
You may also want to check the IBM website: http://www-912.ibm.com/s_dir/slkbase.NSF/7c4c0f5a4d52e3c4862569b4005d198a/4fc8b55774312b49862569c1007aa2ff?OpenDocument