Upon arrival client mentioned that systems are currently cooling. Client inquired about Nitrogen/Isolation Test for 2nd Fl FirstCo Unit. Informed client that the office will send pricing for repair work. Client also has Heating Maintenance scheduled for next week. On return visit each component will be isolated with nitrogen and a return visit will be needed to monitor pressure and find which component has been leaking. Currently systems are operational and cooling. Follow Up Action: Office to Contact client regarding pricing for Isolation Test. Reviewed work completed, emailed work summary.