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Hello, one minute while I get some information together.
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The unit is likely still very low on gas or possibly has a restriction in the sealed system those are the two things that would cause this issue,
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I will be happy to assist you today. It sounds like one of two things.WE have leaked back down on refrigerant or the metering device in indoor cool is sticking closed. Do you happen to have gauges to see what pressures are doing.
Yes they are different.Hoses are different connectors.Let me know if you get them.Here is what we want to do. Connect the gauges before you turn on ac, then as it starts, watch the pressures. We should be running about a 130 suction and high 200s to low 300s head.If both are low, we are low on refrigerant.If head is normal or high and if suction goes to a vacuum the metering device is sticking.
That is correct.Look forward to helping you figure this out.
I am with you.Lets get that condenser coil clean first.WE may be shutting down on high head instead of low suction. I have nor dismantled this particular unit.but I recommend removing top and backwashing from inside.Then rinse from outside.
Sounds good.Talk to you then
Peter are you in heat or cool mode today? And give me readings in both modes
OK so we are in COOL mode. My bad
Really going to be hard to check refrigerant at 47 degrees as there is very little load on unit.
Is it warming back up tomorrow?
WE really need a load on it to get decent pressures.
Lets do this if you can stand it.Turn on heat and get house up to about 80
I am going to say you have a refrigerant leak somewhere.WE should be up around at least 130 and 420
AS long as those pressures stay as they are we can forget the TXV. Only problem there is TXVs can stick on occasion and work most of the time. If we could catch it when it is short cycling and see the suction drop down to below 20psig we would know the TXV was sticking and restricting flow.
Let me see if I can put my hands on anything
Not really fining anything that will tell us both suction and liquid pressures at a given temperature.
Trane recommends charging by sub cooling.I am attaching the sub cooling chart with instructions on how to check.Somewhere on the unit it should tell you the recommended superheat for your unit.
Say the recommends sub cooling s 10,
1.Measure temp of liquid line
2.Locate that label (W are going to say 10)
3.Locate the value in the chart (Say liquid temp is 110, the pressure we are looking for is 418
I would still not rule out that TXV though.Watch it and see if it goes back to short cycling, connect those gauges and see if suction drops when it is doing it.
If you have further questions, please let me know.
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Just a follow up. I did a little more digging and found the chart below. Based on this chat, you my not be low on charge since it is so cold outdoors.AS mentioned previously it is really hard to charge with ambient temps this low.Actually the numbers you provided this morning are not that far off.
I am still thinking you may have a TXV that is occasionally sticking causing the short cycling.