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HVAC overheat or overcharged refrigerant?
We are having AC issue (the air is neither cold nor hot). We had a service person came in. Attached is the reading from his SMAN360 equipment. His diagnostics was that the refrigerant is overcharged. We had the refrigerant charged last year end of the season and we used it for a couple of weeks after that. We read online and it was mentioned that this SMAN360 reading could be due to low refrigerant so we are confused and wanted to ask experts in this forum for their input. We were told we need to replace both our units.
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How is he reading superheat and subcooling when the temperature clamps are on the manifold?
Return wet bulb? Outdoor dry bulb? Metering device? CFM?
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I can't make out which readings are what because of the glare and fuzziness.
Is it saying 81.6 psi on the low side and 231.9 psi on the high side?
Why would you need a new unit?
Bob Boan
You can choose to do what you want, but you cannot choose the consequences.
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Originally Posted by
bobboan
I can't make out which readings are what because of the glare and fuzziness.
Is it saying 81.6 psi on the low side and 231.9 psi on the high side?
Why would you need a new unit?
Cuz the suction and liquid lines are the same temperature as outside! Time to replace!
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You need a new technician that knows how to use their test instruments.
Climate Control Solutions for your Home or Office
Serving Northeast Philadelphia and Surrounding Areas
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Thank you all for your input.
We took the picture after he had unplugged the equipment but measurement was saved.
The readings on the left of the screen is:
81.6 psig
48.5 sh
48.4 vsat
In the middle is:
R- 22 F
Hold 8.7 tsh
96.9 slt
100.0 llt
On the right is:
231.9 psig
11.7 sc
111.7 lsat
Do these numbers suggest that the refrigerant was overcharged?
Looks like we need to have another technician come in tomorrow for a second opinion.... sigh
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His judgement was that the technician who added the refrigeration in the unit last year has over charged it and as a result the unit is damaged now. He said its against regulation to take some of the refrigerant out and even if we were allowed to do that the unit had to be replaced.
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Originally Posted by
fgh
His judgement was that the technician who added the refrigeration in the unit last year has over charged it and as a result the unit is damaged now. He said it’s against regulation to take some of the refrigerant out and even if we were allowed to do that the unit had to be replaced.
He’s a crook. Call someone else.
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Call a different company.
Sent from my LM-G820 using Tapatalk
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Originally Posted by
fgh
His judgement was that the technician who added the refrigeration in the unit last year has over charged it and as a result the unit is damaged now. He said it’s against regulation to take some of the refrigerant out and even if we were allowed to do that the unit had to be replaced.
It’s called recovering some of the charge, and certainly legal to do. He probably gets a commission for helping sell a new system, instead of actually trying to fix your system. Why was refrigerant added last year?
Trouble is when some Techs come on a R22 machine some have a thinking it’s not worth savings, even thou it could be a somewhat minor thing.
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Originally Posted by
fgh
His judgement was that the technician who added the refrigeration in the unit last year has over charged it and as a result the unit is damaged now.
Over charging a system can damage the compressor, if it causes a liquid flood back to the compressor. However, those manifold readings don't actually indicate that the compressor was damaged.
He said it’s against regulation to take some of the refrigerant out and even if we were allowed to do that the unit had to be replaced.
If it was illegal to take some out. Then it would be illegal to replace a compressor on a unit/system, since you gotta take all the refrigerant out to change a compressor.
He was trying to make a sale. Not repair your system/unit.
What was the outdoor temp when he was here.
Is your indoor unit in the basement, first floor, or attic.
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