Right to enter rented unit for inspection of tenant not paying

[Matthew Carlton]

I bought my first rental property a little over ago.  At the time of purchase one unit had a tenant on a month to month and I agreed to let him sign a one year lease.  Long story short been a long year with this tenant.  Haven't been paid rent for the last three months and lease ended 12/1.  Currently working with my attorney to have the eviction done but with COVID it's a battle.  Now to my question.  I am currently rehabbing the other unit of this duplex.  The property has only one water meter that feeds both units.  I plan on posting a "Notice to Enter" at lest 24 hours before I plan on entering.  Its time to replace the filter on the furnace as well as replacing the batteries in smoke detectors.  Ohio law allows an inspection of property.  I am not sure exactly how much of an inspection I am allowed to do.  Am I able to walk through the entire unit to check conditions?  I am looking for a little clear advise in this area.  

I am also planning to have my maintenance guy that is updating the other unit with me to go down to the basement and take a look at the water meter and get a list of supplies needed to split it.  

Thank you for your input