HOW TO FIND A RESTRICTION IN A GE MONOGRAM REFRIGERATION SYSTEM. GE is known for their custom built in refrigerators with a 230v compressor with inverter. After a while through natural wear and tear you will have Poe oil that will slug through the lines and eventually block the capillary tubes causing a restriction.
Wear to find the restriction? is it in the evaporator coil, the condensing coil or somewhere along the lines located in the walls of the refrigerator. Following the steps below will help aid you in finding the restriction and if possible to clean that restriction out. The steps listed here can be used in refrigeration, HVAC and appliances using the same basic concept.
Power. If you reach the electrical plug then pull it, if not find the breaker and switch off the one labeled refrigerator or the appliance name you are working on.
Recovery. The Freon inside this refrigerator is 134a. You must use a certified recovery tank with a yellow top and gray bottom to store the refrigerant in. These tanks can range in size from 30, 50 125+ lbs and more. Make sure the out refrigerant line from the recovery machine is hooked to the liquid side (blue) of the recovery tank.
You need a recovery machine to take the refrigerant from the refrigerator and transfer it to the recovery tank via refrigerant gauges. Make sure the yellow refrigerant hose located in the middle of the gauges is hooked up to the "in" port of the recovery machine.
Refrigerant gauges hook to the high side (Red) & low side (Blue) service port valves and aid in the transfer of refrigerant via the recovery machine to the recovery tank. When both gauges read negative pressure you have successfully recovered the refrigerant.
Refrigerant gauges are hooked up (Red) High Side, (Blue) Suction low side to the compressor.
Here is the refrigerant recovery process using the tools mentioned above.
In the video above as you can see the nitrogen passes through the evaporator coil with no restriction. this tells us the resriction is not located inb the freezer evaporator coil.
Next step is to weigh in the refrigerant charge to manufacturer specifications with a refrigerant scale. You can find the correct ounces or lbs on the nomenclature inside the refrigerator or on the unit you are working on. After you weigh in the charge, plug the unit back in and turn on the power.
These are basic steps to help you in finding a restriction. There are a few more steps in between, if you are a refrigeration technician then you should know all the steps. The important thing is to take no shortcuts. if you need a quality service tech, give us a call.