In general, you should service your photocopier every 3 months. However, the frequency of maintenance will be determined by how often you make use of your copier.
Make a good and objective assessment of your photocopier requirements to know the best starting point for how often you should maintain your photocopier. The less volume of work the copy machine does, the longer you can go before proper servicing and maintenance and vice versa.
It’s also recommended that you perform regular checkups even if your devices are running fine and you don’t think it’s necessary.