Complete 1 system a/c repair and preventative maintenance check. Checked electrical, mechanical components, dusted electrical cabinets, chemical washed units, changed filters. Found the main floor with a dirty evaporator coil recommends cleaning. Found microbial growth recommend pureairx for indoor air quality. Found condensate pump not operating. Changed condensate pump recommend changing tubing client said he would try to clean tubing first. Recommend adding surge protectors to all units. Systems are operating and cooling at this time.