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Old 03-20-2009, 10:06 AM   #16
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It sounds to me like the screen to the TXV may be jammed up with garbage and causing a complete restriction.


Iam not so sure liquid is a culprit because the scrolls raise and separate letting the slug pass thru.

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Old 03-20-2009, 11:01 AM   #17
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While a scroll will raise when flooded with too much liquid.

The liquid still washes out oil the same as it does on a recip.

So if ran in a flood back state too long. It can seize them.
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Old 03-20-2009, 02:52 PM   #18
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While a scroll will raise when flooded with too much liquid.

The liquid still washes out oil the same as it does on a recip.

So if ran in a flood back state too long. It can seize them.
Over temp protection is damn good as the OL is of the inherent type, sensitive to amp and heat. Hard to kill a scroll unless somebody really f's up the install.
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Old 03-20-2009, 03:08 PM   #19
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The 2 things that kill a scroll.

lack of oil, and running in a vacuum
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Old 03-20-2009, 07:44 PM   #20
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I sure appreciate the information, and I'm trying to put it all together. From what I gather, scolls will handle liquid, so my concern about the compressor being locked by excess oil would seem to be without merit. I did not remove any oil from the unit, so I don't think a lack of oil would be the problem. From what I gather on this forum, the scoll compressors are well protected against over load, so I wouldn't expect the compressor motor to have been damaged by the start with inadequate charge. I can't imagine that acid in the system could possibly cause a failure in 6 days. If the TXV were clogged with debris, I would expect the compressor would run briefly until the head pressure built up. The compressor does not run at all. It seems to me the only things left are a defect in the compressor itself(which I seriously doubt), or the compressor ingested debris. I installed a suction filter to prevent this, but is it possible that the filter itself destructed and sent a motherload of garbage into the compressor? I soldered the suction filter on, could I have damaged it with the heat? I didn't remove the suction filter at 3 days because it has been cool, and the unit did not run very much, probably only a few hours a day. I plan on looking at the amp draw next week. Should I try a hard start when it worked perfectly initially, and now won't start at all?
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Old 03-20-2009, 07:54 PM   #21
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Nope. Bad comp after all. Even with a restriction it should start.
But you said it would even though suction follows discharge.

but did you check amp draw with out ohm resistance in the mfd
capacitor range of the cooling spectrum? No, that would case terinary blend contamination exceeding the azeotropic enthalpy
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Old 03-20-2009, 08:00 PM   #22
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How many microns did you pull a vacuum?
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Old 03-21-2009, 11:00 PM   #23
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Didn't have a micron unit to measure. Used a Robinair 15600 with a fresh oil change and pulled down for an hour. HVACLOVER, not following your previous post.
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Old 03-22-2009, 09:47 AM   #24
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The micron reading is not terribly important with R22, R410 yes. Did you wrap a wet rag on the suction filter when welding it in? Get a large rubber mallet and give it a whack upside the head (seriously) when it tries to start. Did you overheat the compressor (can) when welding the lines on? I assume you did not but anything is possible. Sounds like you got a locked rotor/seized compressor. The scrolls need absolute oil return as they will rub metal to metal. Clover is being superfluous and having fun. Good Guy though. LOL
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Old 03-22-2009, 09:50 AM   #25
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Did any body check the capacitor?

Just brain storming.
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Old 03-22-2009, 01:23 PM   #26
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Both capacitor and contactor are new, could it(the capacitor) have failed after only 6 days?
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Old 03-22-2009, 01:26 PM   #27
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I tried to concentrate the heat on the tubing and moved on to the suction filter as needed, but no, I did not wrap a wet rag on the suction filter when soldering it. The compressor, yes, but not the filters.
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Old 03-22-2009, 01:50 PM   #28
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Walla, you may have damaged the suction filter and it disintegrated and got into the compressor over time. Sorry Capacitors rarely fail that soon. Don't want to make you feel bad but you also have to remove schraeder valve cores and wrap king valves or they get damaged. Sorry to say but that crap may have reached the TX valve. Then again you may have not damaged the drier but it doesn't sound good from here.

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Old 03-22-2009, 01:57 PM   #29
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Quote:
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I tried to concentrate the heat on the tubing and moved on to the suction filter as needed, but no, I did not wrap a wet rag on the suction filter when soldering it. The compressor, yes, but not the filters.



I use the paste at driers, at A coil & condenser
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Old 03-22-2009, 03:53 PM   #30
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Both capacitor and contactor are new, could it(the capacitor) have failed after only 6 days?

Not to be trite, when it comes to new comp failing, I would check just to make sure.

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