Perform Cooling preventative maintenence inspection on five Bryant rooftop package units. Four of the five units are operating properly within specifications. Tested refrigerant levels, outdoor fan capacitors, and blower fan capacitors. Water flushed condenser coils, evaporator coil condensation drain pans, and condensation drain traps. Test ran operational units from respective thermostats. Thermostats do not require batteries. Replaced two 16x25x2 in each unit.