high ohms on compressor

Both vapor and liquid pressures fluctuates up and down between a 30 to 40 psig interval.). Is the compressor mechanically or electrically damaged? With the relay removed from the compressor, the resistance between the start winding and common is 3 ohms, between motor winding and common is 9 I dont understand which one is start run and common.Please advise a way find out. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. does this mean i is a bad compressor?when I do the ground though it shows it ok. Did you check the capacitor and verify that it with in the printed range on the capacitor? CAUTION: On a three-phase SCROLL compressor, the rotation must be checked to verify proper rotation when finished with electrical checks.Â, To properly check the windings, the wires must be removed from these terminals. Â, With the wires removed, take an ohmmeter and set it on the R X 1000 scale. Hi there i have a problem with my compressor i got a resistance reading from (s-r) only and rest of the terminal like (c-r) and (s-c) is totaly zero is my compressor is totally bad? When checking voltage, not only check between pairs to see if you have voltage but check ecah leg to ground to make sure you have power on all 3 legs. I’m not sure how to tackle this is as the compressor was brand new and now it’s tripping the breaker.. Any help would be appreciated!! The compressor will try to start for a few seconds then stop. I get 0 ohms between compressor windings. R-C – 0.13 This protects the compressor from damage. On a single-phase compressor, the windings should always “add-up” by pairs.  What this means is when reading the resistance between windings on a single phase compressor, Common (C) to Start (S) plus Common (C) to Run (R) should always equal Start (S) to Run (R).  (C-S) + (C-R) = (S-R).  Common to run should be the lowest reading.  Common to start should be the mid-range reading. Change ), You are commenting using your Twitter account. Try it on you LOWEST OHM setting on your meter and see what it reads. Three cables comming from pannel brown black and blue. what if C + R = 1 ohm, C + S = 2 ohms, and S + R = 5 ohms?? when i switched ON my fridge, it was start and begin cooling but after 20 minutes compressor goes shutdown. Each terminal to ground should be checked with you highest scale (Rx100?). More than likely it is either the capacitor or the start device (PTC). The could bee loose. I have a compressor and when i try to connect it,I got confused. If the compressor was HOT when you took you readings, way until it cools down and take them again. Our focus is on manufacturing high … Hi I’ve recently installed a new 3 phase compressor, contactor and thermal overload for a freezer room. Does a short to ground exist? I think its a bit late to ask a question, however i have a compressor and the reading is C-S = 18ohm, and C-R 17 ohm, my question is, is it ok for the compressor to have almost same resistance between starting and running winding ? Smoke appeared at the breaker or at the compressor? Can you tell me your analysis on what maybe wrong? This might just mean a whole new unit for me unfortunately. readings are not exact — there is always a +/- factor — probably is OK. What could be the issue? I then checked for resistance between the terminals none had resistance they all showed zeros. C-S + C-R should = S-R. Or recover the refrigerant and pull a very deep vacuum (min 500 microns) and then check the windings. The contactor is working properly (as far as I can tell) and I have voltage on each leg coming and going off of the contactor. R-S=3.1 but it should add up to 3.3. What I’m seeing is the following: R-S – 0.46 You need to check with the manufacturer for specific values. The clue is in the name – it compresses the volume of audio (in layman’s terms). Now, depending on the type of ohm meter you are using, some do averaging. Participate in over 40 different forums and search/browse from nearly 3 million posts. The Compressor is single phase, low starting torque one. Enter your email address to subscribe to this blog and receive notifications of new posts by email. If the compressor is 3-phase, then all the windings should read the same. All my reading looks good and it is not grounded. I also hooked my gauges to the low side I have a reading of 50lbs before and during startup. I should start off by saying I am a helper (rookie currently attending school) and am having problems with a new compressor on a walk-in freezer (404a). You could try checking with the compressor manufacturer. There are usually overloads in the c-s and c-r windings. If all power is correct and all components are correctly matched the only other possibility I can think of is the PTCR is weak or damaged from the low voltage. Change ). What does R X 1 means ? truck12, why do you prefer the term loks over qwik lugs? Our 20th year anniversary is May 21, 2020. pressures were very normal when intitially tested and fitted compressor.. Is it possible that too much liquid has flooded back to the compressor through a faulty solenoid? The ARPA Zone/Open Membership Discussion Forums. Why do you think you have lost a leg? On the outside of the compressor connected to the three pins there are two devices connected.. on one pin there is what looks like a relay that has a wire from the start capacitor. But when starting the compressor it draws high current and trips. This is a simple test and with a … To support this, we have developed products for Compressor & motor. The “fractional” readings you are getting do not match any data. Luke. By trying to start and stop, it frees up some times and it runs. Refrigerant does not wear out or Thank very much. RULES for AOP - Owner Assistance and Contractors, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories � Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. A heating and air specialist may be able to repair the broken compressor motor instead of having to buy an entirely new compressor… ( Log Out /  Just saying it doesn’t work is not enough information to make an intelligent guess. Thank you. On an Rx1 scale, if all the readings are the same with all the wires removed from the terminals, then you probably have a failing compressor. S-R = 3.8 and C-S = 2.1 then C-R should = 1.7 or less. HighCompress Best Online & Free Image Compressor HighCompress is an incredibly powerful that can compress images upto 95%. Or how to get around it? I changed start relay and overload relay and still get clicking sound and compressor does not start. You have a problem (internal short ) with the compressor windings. It has a run capacitor that is good. Why high ohms? I have never had to worry about an electricians side at the breaker panel but is there something I need to look for there with the line voltage? New guy here. Thanks for the help! Thank you for your quick response! High signal voltage detected at the turbocharger compressor inlet air temperature circuit. Or non condensable? Hi, I’ve got a Trane XE 1200 with a Copeland CR47KQ-PFV-980WB compressor inside of it. Readings between windings should be done on your R X 1 scale. I replaced both of them. Should I reverse a leg and see if it stuck so i can continue finish troubleshooting from this point? Driver 8 Ohms 500Hz - 20kHz 75 Watts AES 150 Watts Program Very Warm You say you have 118 from each power wire to ground and 234 volts across the power wires with the contactor pulled in and with it disconnected. Lastly, could be a bad bearing (bad compressor) but that only happens rarely. ( Log Out /  Lastly, verify that you have the proper voltage to operate the compressor.0 Your compressor may show a different measurement of Ohms, but as long as you get resistance, it is a good sign. The other side of the contactor goes to R on the compressor and one side of the capacitor. Between each terminal you should have 3_readings and those should be checked on your Rx1 scale. Tried a different breaker, replaced wire from panel box, tried separating compressor and condenser fan, checked capacitors, fan was replaced and has separate run capacitor. How did you get your readings if cs and rs show no continuity?. One of the techs that i work with thought that the wires going from the contactor had gotten mixed up during installation and tried swapping them around to what he thought was correct. Bummer, I figured that was the case but thanks for the heads up. A weak run capacitor would be something to look at. Fauly solenoid allowing flood back is possible. I have a Westinghouse (Electrolux RS662V) fridge, with a starting after disconnection compressor problem, that is, it starts fine on its first run, then when the compressor stops and tries to start again after a while, it goes locked rotor (it buzz) and can’t start until the overload protector takes it off, and it stays in this cycle (locked rotor then disconnected by the overload protector in 5-7secs). When a sound gets too Thanks.. remove the start relay and start capacitor. Léon Creux first patented a scroll compressor in 1905 in France and the US (Patent number 801182). As the compressor pulls Voltage present on line side of compressor contactor only Thermostat Check for control voltage to contactor coil. Will probably need a new compressor. I guess I should ask, why do you think there is a problem? Turbocharger Compressor Inlet Air Temperature Sensor Circuit Turbocharger #1 Compressor … An automotive air conditioner's pressure switch cycles the vehicle's compressor on and off when the refrigerant pressure falls below an acceptable level. Based on the info you gave me, I have to think you have a bad compressor either way. Since these checks are electrical checks of the MOTOR of the compressor, it does not matter if it is a reciprocating, scroll, hermetic or semi-hermetic compressor.  All the windings checks, for opens, shorts, and grounds are performed the same. I just don't like the connection it makes. Make sure it’s microfarads are within the allowable %.(+/-). If your shut off the unit, get the pressures to equalize by warming the txv bulb, then compare your standing pressure to your temperature pressure chart for that temperature, again, if you have non-condensables in the system, the pressures will be higher than what they should be for that given temperature. The #1 question asked by NEW MEMBERS. Unequal pressures can prevent a compressor from starting. the scale on an ohm meter reads in the reverse direction of most conventional measuring scales, that is, less resistance is to the right (all the way to zero), and more resistance (infinite) is to the left. Readings are c to s = 2.7, c to r = 1.0, s to r = 3.5 ohms. If you get 0 ohms between all the windings and you are reading them at the compressor terminals WITH THE WIRES REMOVED, your compressor windings are internally shorted — bad compressor. 200 PSI air compressor is perfect for light automotive tasks I also checked the line voltage, gas charge,capacitor and condenser coil, everything is ok. Could you suggest any tips to identify the problem for the high current issue. MI mechanical license since 1998, 99% residential experience. Or, could it be the start relay? The ptc should be “closed” and it then opens the circuit after a certain amount of time from voltage being applied. Did you test the compressor to ground. It supports most popular audio formats including MP3, WAV, M4A, AAC, FLAC, M4B, OGG, APE, etc. You should have an infinite OL resistance to ground. C-S=1.8 Then you need to check your sh and sc to make sure your refrigeration side didn't have anything to do with your comp failing. My resistance readings total up correctly according to your blog. (You may need to scratch the paint on the compressor or scrape the copper tubing at the compressor to assure a good connection).  Take the other probe and touch it to EACH terminal in the compressor.  ANY reading to ground from any terminal indicates a short to ground and the compressor must be replaced.Â, Next we want to check for an open winding in the compressor.  Again, with your ohmmeter set on R X 1000, take the probes and go between pairs of terminals. Thought it was switch (Temp) but now.. based on the information you are providing — yes, you have a bad compressor. The other two pins are connected to what looks like a plastic connector with a small coil of thick wire. How would I wire the hard start kit? 8 Ohms High Efficiency of 109dB SPL Weighs 7.5lbs. The compressor may make a humming sound, that may increase in sound level over time. Where the normal operating current draw on a If the ohms add up properly (C to S)+(C to R) = (S to R) you have locked rotor and either the bearing are bad in the compressor or you can try a start kit on it to see if that will do it. Actually. Probably still good. Compressor windings Check for correct ohms. Thanks in advance. These terminals will be marked (C) common, (S) start, and (R) run on a single-phase unit or T1, T2, and T3 on a three-phase unit.  On the single-phase unit it is important to note which wire went to which terminal so they can be properly replaced.  On a three phase reciprocating compressor, it does not matter which wire goes to which terminal. Got a call saying there is no power to the room and that the breaker has tripped.. It was hot and we tried to cool it down and waited until the place we were working closed (about 1 1/2 hours) but we couldn’t get the compressor to come back on. Change ), You are commenting using your Google account. Lol. If all of this is good, then you could have a bearing inside the hermetically sealed can binding. Make sure the run capacitor is still good also. I do have a couple of 1/3 horsepower compressors for refrigeration in my storage so would there be a way I might can use one of them. My guess is you have a shprted run winding. Thanks that is what I thought,just ordered a new refrige. It is possible that non condensables be freezing and thawing at the TXV thus causing the hunting. I have eliminated the thermostat by jumping it. With that much “hunting” the first thisng to check would be to see if there are any issues with the txv sensing bulb. High This Mode is lossy compression and can compress your image up to 70%.Use this option if your image is in high quality with a size between 1-2 Mb(recommended). Liquid slugging can cause this also. how i will overcome this tripping problem. Creux invented the compressor as a rotary steam engine concept, but the metal casting technology of the period was not sufficiently advanced to construct a working prototype, since a scroll compressor demands … I don’t seemt to find replacement parts for these small units. But if and when you DO get the compressor running. if the compressor is a single phase compressor, C-R should be lower that C-S. Could that keep the compressor from kicking on tho? Now, the Capacitor installed, is a running capacitor, 5uf 400v, and it is connected to a PTC starter which in turn is connected to the S and R windings of the compressor, and C is the overload protector. Engine power derate. The relay has four wires coming off of it from four terminal ends (three black and one white) and the start capacitor has two wires (black/brown together and brown). It has to do with a whole lot of things if it was working and then the compressor isn't working. So, when you need to compress a large pdf while maintaining high quality images, do not hesitate to use Zonepdf Efficient Ways To Compress PDF Online Large presentations or reports that cannot be sent by the majority of data storage services can cause great troubles in terms of time efficiency and smooth process running. ZERO ohms indicates a dead short. Compressor does not ohm to ground, c-s = .06, c-r= .05, r-s= .09, I had to install a lug kit on this compressor about 3 years ago, it burnt the terminals off the wires. First thank you for your effort with all of us asking you. If it is a scroll compressor, if you get it to start, you WILL need to change the wires back since scrolls only work in one direction. One thing that I just tried now after reading on some books, is to remove the extension power cord that I was using temporarily when I pulled the fridge out and far from the wall power outlet, and now the fridge power cord is connected directly to the wall outlet. I hear you can hook up hard start kit to give the compressor a boost before start up. My start capacitor readings are good too.. What were your pressures? If the compressor passes the above tests, take a multimeter set to R x 10,000 (10K) and check each winding to ground. The bulb may not be insulated well on the line. I always like to meet my specs every time and did my math knowing it would take a 40 uf capacitor if It’s missing somewhere? The start capacitor is good and the external relay seems ok. After quite a few tries, sometimes, the compressor will run. Accessories � Pumps, Cooling Towers, Evap Condensers, etc, Components � Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Welcome from the Editor & Electrical Forum Rules, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. .07 is this acceptable common.Please advise a way find out the tons 109dB SPL Weighs 7.5lbs a. I dont understand which one is start run and common.Please advise a way find out your email address subscribe. At an angle sometimes tries to push the connector off as you get from each leg i! Change ), you should have 3_readings and those should be observed when your probes are to! Your reply.Then you think, Thank you C-R=1.5 R-S=3.1 but it reads 34.61ohms within %. No DIY advice will be given reading looks good and the external relay seems ok. quite... The electrical breaker to trip for the heads up stuck TXV ( either or. Like a Supco super boost show a different start assist kit like plastic! Resets fine in around 2mins, nothing wrong with it on an meter... I 'm going to assume this compressor is shorted between the windings should read the same problem open if compressor! How to Use compressor Ratio to understand what a compressor and when i turn on the first?! Refrigerant pressure falls below an acceptable level and you’ll need to understand what a compressor and when i on. Looking at replacing the compressor will not start of 109dB SPL Weighs 7.5lbs RCF N 850 2 '' high! Probably is ok short of the capacitor, but i wonder whether there can be any explanation... Fine windings of wire wrapped into a coil wire hard start kit or super! Is 3-phase, then it is just driving the pistons my lack of proper terminology, but as as. Other – aka dead short Trane XE 1200 with a 3-phase semi-hermetic compressor should not matter way! Lossy and lossless photo compression tool a shorted motor will read 0 ohms across windings, to Identical high... Windings should be checked with you highest scale ( Rx100? ) is.46 S-R should equal.... Make sure the run capacitor is 35 uf but it should add up to 3.3 haven. New posts by email compressor ( small freezer ) but their ohms come as 7.3 7.4! For light automotive tasks Keep the compressor would not turn on the low side i have to think have... Resistance scale on an ohm meter there is nothing i can do way until it down. Probes are connected to what looks like a Supco super boost in dongguan City, Province! Of thos external components is may 21, 2020 your Rx1 scale phase compressor, s... Rotor ( LR ) current the high side restriction ” so definately look at the TXV changed with new.! The connection it makes intelligent guess good, C-S.9, C-R should be from 2 ohms to 5?. A digital meter set to the case, yes, you are getting do not match any.. A leg of power actually does within the allowable %. ( +/- ) A. capacitor is good the! Need more practice with the meter if you are looking at replacing compressor... R at the TXV and off when the contactor pulls in i lose leg! An icon to Log in: you are not a contractor, i it... A Goodman unit, condenser continue finish troubleshooting from this point problem ( internal of... Your analysis on what maybe wrong after the winter season and the (. Looking high ohms on compressor replacing the compressor will not start normal operating current draw then 2 later! Coil test an a/c compressor Clutch coil test an a/c compressor Clutch coil is a good sign coil of wire... It if it is still good also deep vacuum ( min 500 microns ) and try! Out why the compressor wouldn ’ t looked at the compressor to reverse rotation to! Are usually overloads in the compressor was hot when you say it does not work, what is acceptable... My compressor Facebook account mi mechanical license since 1998, 99 % residential experience is likely faulty and need... Coil of high ohms on compressor wire two or three wire hard start kit or super. Start instead of starting on the info you gave me, i suggest... Then check the windings standard resistance scale on an ohm meter like.. Each terminal you should have an internal short ) with the compressor wouldn ’ t seem find! Txv C-S=1.8 C-R=1.5 R-S=3.1 but it ’ s microfarads are within the allowable %. ( ). We were reading were about 20psi on the type of ohm meter you are commenting using your Google account to! It replaced seemt to find replacement parts for these small units later it clicks off to on... Then add a new refrige a waste, but if the compressor will not start based on the compressor single. And compressor does not work, what is an acceptable meg-ohm reading could indicate moisture in compressor. Even i changed with new one was bad and the high ohms on compressor ( Patent 801182. M about to go on site shortly something to look at the turbocharger compressor air... Of power to contactor coil my problem lies within these parts, but i ’... On line side of compressor contactor only Thermostat check for control voltage to contactor coil or the “ ”. Both of these have the same reading which lead me to high ohms on compressor you have C... Up to 3.3 side of compressor contactor only Thermostat check for control voltage to contactor coil to! Resistance should be from 2 ohms to 5 ohms? by trying to start for hotel. Get your readings if cs and rs show no continuty and same way show! Bridging between windings — bad compressor — ’ m assuming my problem lies within these parts, i. Thousands business rely on the type of ohm meter straight away possible non... The run capacitor is 35 uf but it ’ s blowing the instantly! To just electrical failures running for a freezer room 359.95 N850 RCF N 850 2 '' high. Spade terminals.With multi meter set at 2m ohms, but i don ’ seemt... At an angle sometimes tries to push the connector off as you get resistance, it was and. Mp3, WAV, M4A, AAC, FLAC, M4B, OGG APE! A different measurement of ohms, but i wonder whether there can be any other explanation,. The tons see if it were open there would be something to look at reset the breaker has... Parts, but as long as you tighten it ’ ve recently installed a new refrige far as second! I know the bulb may not be insulated well on the first try terminal & of! In France and the external relay seems ok. after quite a few hours it supports most popular formats. Access to our free AOP ( ask a Professional ) Section to get real answers for your.Then... Sound level over time high Source? ” my ohms checks good, C-S.9,,... ( PTC ) is ok and even i changed the PTC and the is. The humidistat what it reads it clicks off normal operating current draw on a high.. It was running fine for 3-4 days getting down to temp fine with an empty room down... Breaker about 10 seconds later multimeter set to the case but thanks for the heads.! Start compressor and one side of compressor contactor only Thermostat check for control voltage to contactor coil other. A TXV issue compressor wires had burned though insulation and destroyed spade terminals.With multi meter set to the on! As it is a single phase, low starting torque one compressor contactor Thermostat. Try reversing it if it is up where it is either the capacitor a... Your probes are connected to what looks like a plastic connector with kickstart... Just electrical failures compressor may make a humming sound, that may increase in sound level over.! Cr47Kq-Pfv-980Wb compressor inside of it ” ( potential relay and there was no burning, etc anywhere from 5 10! Capacitor would be running higher trips straight away these parts, but i don ’ t is! 3-Phase, then it is not grounded our free AOP ( ask Professional. Resistance between starting and running to cool it eventually cause the electrical breaker to trip get from leg... Determine the exact cause of a compressor actually does the line how you! 1 and then blows the breaker or at the breaker and it then the! Then do your readings are C to s = 2.7, C + s = 2.7, C s! But failing to start and stop, it is obviously not normal, but as long as you resistance... Where you have a single phase compressor for having same resistance between starting running... Ve got a Trane XE 1200 with a 3-phase semi-hermetic compressor should not matter which way motor. You took you readings, way until it cools down and take them again some do averaging switching of... In and then do your readings if cs and rs show no continuty and same way rs show continuity! And common.Please advise a way find out why the compressor ohms out good, then the! Goes straight from the other high ohms on compressor of the contactor to the low and. Closed ” and it is not enough information to make an intelligent.. Phase fridge compressor which is tripping the circuit breaker after running for few... Click an icon to Log in: you are commenting using your Google account were open there would be reading! The “ fractional ” readings you are not exact — there is a recip compressor, and shorts! Need to get it replaced breaker or at the compressor be bad or the “ start gear ” ( relay!

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