Good morning Mr. Jose Emilio. I ask you, when you start to work the fan motor of the condensing unit you see the blade turning strongly? or getting enough air? you should check the capacitor of the capacitor motor, for that you must have a capacitor or disconnect it from the card and take it to a spare parts sale or a technician in electronics to check it, NOTE: to do that work you must disconnect the electric power and DO NOT touch the card on the back where the welds are and be very careful not to touch the back where the 3 battery-type capacitors are soldered, since they accumulate high voltage. Another question ... have you done maintenance service to the air? washing coils with water under pressure. check if the coil of the condensing unit is dirty or covered and if so proceed to wash it, by logical covers or protect the motor and the cards very well. another ... check the Voltage, measure it with a tester and see if it is in the ranges recommended for air conditioning. Summing up what you should do and check ... (1) check the condensing coil, which is clean. wash it with water under pressure. (2) slow capacitor motor ... check and measure capacitor capacitor motor, it is usually 2.5 microfarad. (3) Measure the voltage at the socket or breaker and see if it is the right one. low or high voltage. Friend José Emilio, any questions comment here.