308. 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?

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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.

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