Performed two system cooling maintenance, replaced customer supplied air filters. Indoor equipment is still in good shape. Made homeowner aware of evaporator coil for downstairs being 3.5ton and condenser is 4ton. She will call builder to get an explanation on how to move forward. Would recommend float safety switch on the primary drain line since there is no float safety devices at all on either system. Proceeded to outdoor unit capacitors, motors, and compressors all reading within manufacture, specs, rinsed off condenser coils with water only systems are cooling at this time. Will make recommendations for SS1 float safety devices. Equipment not registered under Rusca name, according to Carrier.