You have completed repairs to a small galley refrigerator which uses a capillary tube and a hermetic compressor. The repairs required complete evacuation of the refrigerant and you find that you do not have a proper scale to weighing the amount of refrigerant you will recharge into the system. As the unit is critical to galley operations you must try and restore it to service. The most prudent course of action would be to do which of the following?

Question

Accepted Answer

Add an undercharge of refrigerant to get the system started, in order to not flood the compressor with liquid, then slowly add refrigerant as you monitor pressures and temperatures.

Answer

Add twice the recommended amount of oil to the compressor, to restrict refrigerant flow, then slowly recharge until the compressor oil level returns to normal.

Answer

Add liquid refrigerant to the suction side of the compressor until you see liquid coming from the evaporator suction.

Answer

Add a significant overcharge of refrigerant, to ensure the condenser is full, then slowly remove refrigerant as you monitor pressures and temperatures.