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if the power element is broken (lost charge) the tx closes off, system will go into a vacuum and stay there. Must still know if a cpr is in the unit. If no cpr troubleshoot metering device, if there is a cpr I bet it is the culprit
copeland compressor with low suction. you are bound to find a cpr valve on that hussman that is not openning propely.
copeland compressor with low suction.
Actually, the bottom cap on the "G" bodies, at least, I believe, are still available as a replacement part. Andy might be able to answer that... I used to carry a couple spares. BTW. No such assortment, I was busting on you.
Originally posted by R12rules Originally posted by condenseddave Originally posted by oly Dice and Bowman, have it, replace the powerhead, I would presume the compressor is cycling on the l/p control. I have not yet seen a txv fail, just the power head..Oh, great this is going to bite me in the @ss.... There are no bad TXVs, just bad elements and mistaken technicians. This doesn't apply in only a few instances, such as TXVs that have permanent power elements. Dave, what about when a tech has turned the adjustment stem so far it has snaped the clip ring? Does not that make the valve no longer workable? That would fall under "mistaken technician", or more appropriately, "ignorant gorilla". Why? You got something you want to tell us? You mean you're not carrying a Sporlan snap ring assortment in your truck???
R-12 to me that makes the tech no longer workable. The Sporlan TXV has got to be one of the most reliable devices in refrigeration. Not perfect but close.
hem075 a lot of people have given you sugesstions what's your status, any response what have you found
Originally posted by condenseddave Originally posted by oly Dice and Bowman, have it, replace the powerhead, I would presume the compressor is cycling on the l/p control. I have not yet seen a txv fail, just the power head..Oh, great this is going to bite me in the @ss.... There are no bad TXVs, just bad elements and mistaken technicians. This doesn't apply in only a few instances, such as TXVs that have permanent power elements. Dave, what about when a tech has turned the adjustment stem so far it has snaped the clip ring? Does not that make the valve no longer workable?
Originally posted by condenseddave Originally posted by oly Dice and Bowman, have it, replace the powerhead, I would presume the compressor is cycling on the l/p control. I have not yet seen a txv fail, just the power head..Oh, great this is going to bite me in the @ss.... There are no bad TXVs, just bad elements and mistaken technicians. This doesn't apply in only a few instances, such as TXVs that have permanent power elements. Hem057 , if there is nothing for the comp. to pump, how could the head pressure go up. The system probably has more than enough room to park all the refrigerant in the condenser. Dave as usual is right on.Powerhead or I bet you gots alot of gummy garbage , or my favorite word for invoicing "debris" in there. No bad TXVs just misunderstood.
is there a crankcase valve?
check your inlet screen. If there is foreign matter there, treat as a contaminated system. Only seen this occur once in a 502 system. It had overheated severly and some black power appeared inside, plugging everything up REALLY REALLY BADLY!!! How did you seal the leak at the compressor terminals? I have a secret fix for those. If you send me your secret decoder ring, for me to make my own copy of, I will send you my seceret for repairing the leak at copeland compressor electrical terminals. And NO, it does NOT involve the use of Ductape!
Originally posted by oly Dice and Bowman, have it, replace the powerhead, I would presume the compressor is cycling on the l/p control. I have not yet seen a txv fail, just the power head..Oh, great this is going to bite me in the @ss.... There are no bad TXVs, just bad elements and mistaken technicians. This doesn't apply in only a few instances, such as TXVs that have permanent power elements.
Dice and Bowman, have it, replace the powerhead, I would presume the compressor is cycling on the l/p control. I have not yet seen a txv fail, just the power head..Oh, great this is going to bite me in the @ss....
I assume you are using R502 depending on your conditons, your amp draw can be anywhere from 4.0 to 6.0 (you can get an amp draw curve from your local Copeland wholesaler) example :110 Condensing -10 suction - amps are 7.4 you are probaly under amping the main cause of terminal seals leaking is slugging that should give you a clue
Terminal block lowside. Txv may have been original problem. Hem did you weigh the refrigerant you pulled out? That always helps me.
Question. What side of system is the terminal block on? It could be possible the system was pulling in air if it is on the low side. This would cause the txv to freeze up would it not?
sounds like a moisture at txv icing up the orfice you did say it was in a vacum when you arrived? low side leak? sucking in ambient air?is the txv frosted up?where does it start on valve if so?will the valve feed by warming up the bulb for powerhead on txv?
You have a bad txv, bad power element. When ya take the old one out, try to blow through it. If ya can't, you found the problem.
Your defently restricted, check your txv, powerhead, something is not allowing you to feed refrigerant thru it, therfore lowering your amp drawl becouse you are not picking up any load. I would guess either you have foreign matter in your valve itself, or your powerhead has become weak not allowing pressure to be applied to your pushrod/s inside the txv. If you have a restriction it is just like pumping the system down, your head pressure will go down due to less load on system, no load=less amps=no/little heat extraction....eric
thanks for the comment but a restriction would drive the head pressure up? I blocked the condenser and still didn't send head pressure up, I did put on a new drier, this is a txv system and I added more refrigerant, while doing this the amp draw went up to 7, but then came right back down, and pressures went back to what was already mentioned and I should have mentioned that this is R502 was and still is
Sounds like you have a restriction in your system....eric
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