Arrived for diagnostic. Evaporator coils was all frozen. Whole Suction line was frozen. Turned off ac, turn on fan from auto, left site for ice to defrost. -came back to finish diagnostic. Unit was low on charge. Informed customer about unit status before charge. Customer approved charge up to 3 pounds on unit. Charged unit up to 3 pounds of Refrigerant, delta t jumped from 1 to 16 degrees. Unit has a fixed piston as a Metering device. Unit information after charge:
