Upon arrival customer stated that ac unit for the main floor was not working properly. Stated that when unit tried to kick on it would trip the main panel breaker. After inspection of 15 year old r22, system found that unit had a failed condenser fan motor and when compressor would kick on breaker would trip. Capacitor tested good, contactor is very pitted and worn out. Condenser coils are very dirty. Checked upstairs air handler. Evaporator coil is very rusted and evaporator coil drain pan is filled with rust causing rust to clog drain line. There is no flood protection on equipment, no wet pan switch in drain pan and no in line float switch. Blower wheel is very dirty and impacted causing blower motor to have high amps and close to failure. Blower motor capacitor is bad. Due to age of system, unit r22 refrigerant being obsolete, and cost of repairs. Highly recommend updating system. Making band aid repairs to system will make unit run but will not fix all of the underlying issues. C