I also agree with dave
Trane XR-15 Installed May 2015 Now Needing Cooling Side Expansion Valve
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Direct from goodman installation instructions
- Sweep” the refrigerant line with nitrogen or inert gas dur- ing brazing to prevent the formation of copper-oxide in- side the refrigerant lines. The POE oils used in R-410A applications will clean any copper-oxide present from the inside of the refrigerant lines and spread it throughout the system. This may cause a blockage or failure of the me- tering device.
Pressure test the system using dry nitrogen and soapy water to locate leaks. If you wish to use a leak detector, charge the system to 10 psi using the appropriate refrigerant then use nitrogen to finish charging the system to working pressure then apply the detector to suspect areas. If leaks are found, repair them. After repair, repeat the pressure test. If no leaks exist, proceed to system evacuation.
System Evacuation
Condensing unit liquid and suction valves are closed to contain the charge within the unit. The unit is shipped with the valve stems closed and caps installed. Do not open valves until the system is evacuated.
You could setup a branch office at Lake Blackshear which has tremendous boating and fishing opportunities while being closer to the best deer hunting areas in Randolph and Stewart Counties and quail hunting which is throughout SW Georgia. And access to I-75 is just 15 minutes away.
Improper startup by the installing technician.
What about the GSB regarding the refrigerant oil additive to correct problems with TXVs? http://www.hvacrecalls.com/files/20...ure-for-TXVs-Only-Patent-Pending-10-14-14.pdf
I would refer those questions to the Trane "engineers" on the case.
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