I just added a Main Filter to my printer for the Preventative Maintenance and the SmartFilter Tag was not accepted

Make sure that the SmartFilter you are installing matches the Model of the printer you are installing it into. Some of the models are restricted to which filter you can fit. For Example, the Model 81 has its own 2,000 filter kit. Part# 31-5055-02 is specifically for the Model 81. If used in any other printer the tag will not work. Also, if another filter kit is installed in the Model 81 the tag will not work either.

Model 81 – 31-5055-02

Model 82 – 31-5053-02

Models 86/87 – 31-5051-02

Model 88 – 31-5050-02

Model 88 Opaque – 31-5054-02