Too Much Oil In Compressor

I also changed to hydrocarbon refrigerant (Duracool), which works great. I talking about the compressor crankcase filling up with oil!! Large amounts of oil!!! How is it possible to have too much refrigeration oil in the compressor? It should be a simple procedure. Here's Why:. Put NEW oil in the new compressor. It powers through tough jobs without having the need for even a single drop of oil. With 5litres of oil, my dipstick reads at the F in the word FULL. If a leak in the system has been located and repaired, such as a loose fitting, a small amount of oil can be introduced into the system with the engine running without harm to the unit. Too much oil, you slug the system, too little, compressor says "see ya". I recall 50 mL in accumulator and 60 in compressor. Way too much oil could choke the compressor. Yong Heng compressor maintenance schedule I filled my Yong Heng with a standard compressor oil - better than putting in motor oil, which some of the suppliers are. Too much oil can hurt cooling performance. I would check on the type of oil also, all PAG oils are not the same. High head pressure is caused by:. I was brought a XRVS476 with the complaint that the compressor was using too much oil. If the compressor isn’t starting, your air conditioner may be low on refrigerant, and the compressor may be too hot or broken. If the safety valve is located before the oil separator, check differential pressure of oil separator. Our air compressor how-to library can help you pick the perfect single-stage air compressor, two-stage air compressor, rotary screw air compressor, air tool, or air compressor accessory. My bet is it is carboned up and needs replacing. Centrifugal Compressor Power Calculation using Process Simulator. 6 liter oil capacity of this block, took in 2 liters of oil. Set the ON/OFF switch (I) to the O (off) position. For preserving it how much space it demands is a concern. The air compressor should come with a manual and warning label explaining what is considered a dangerous level of pressure inside the air compressor. No matter the size, before you fire up your air compressor, check the manual to make sure your compressor uses oil, and where it goes. How do I Add AC Compressor Oil? | BlueDevil Products. Too much oil in the compressor can cause damage and likely busted the internals on the compressor causing the dead short for sure. If the compressor isn’t starting, your air conditioner may be low on refrigerant, and the compressor may be too hot or broken. Consider two additional effects of having too much refrigerant in a compressor's crankcase at start, oil dilution and oil pump out. AC Oil charge, how many ounces? drain the oil from the compressor see how much is there and adjust. Flooded – Flooded compressors pair oil with the air being pressurized as it moves through the system and then filters it out before discharge, recycling it back to the sump for continued use. All too often they either supply too much or, more critically, not enough oil. Too much oil is in the system. Not enough oil will cause compressor binding and clutch slipping. Air Compressor Oil Cross- Reference Chart Listing of Major Manufacturer's and Delta's Product Equivalents Company Product # Oil Type Viscosity(ISO) Delta's Replacement Sullair Sullube 32 PAG 32 cst 6321 -32 SRF 8000 PAO/Synth Hydrocarbon 46 cst 2015 -46 24 -KT Silicone 32 cst 6088. This method of power is commonly known as a Front End Accessory Drive (FEAD). Replacing The AC Compressor Clutch. Compressor starts, oil level gets to about 1/2, then starts to bubble/foam a little at a time. On the surface, the Standard Cubic Feet Per Minute of an air compressor may seem to be the most important decision, since this determines how much air pressure you can expect at any given time. If there is not enough charge, the compressor will over heat due to a lack of oil circulating. An A/C compressor bypass pulley is a much cheaper alternative to air conditioning repairs that can be rather expensive. Goredangel. Replaced one compressor then still had the problem so they figured out that compressor had gone bad too,so I replaced that one,but I still could drain the one air tank a couple times a day & oil kept coming out in substantial quantities. Check system refrigerant charge. The two are operated in a redundant fashion (never run at the same time). The Fini Advanced 1. 2L engine in it and found out it has 2 broken exhaust manifold bolts that are leaking. If a compressor’s oil supply is in constant need of replacement, it’s likely down to one of the following four factors:. But overall, the method is correct. Too much oil in the system can puddle in the condenser and obstruct the flow of refrigerant causing a drop in cooling performance. The compressor is a vital and expensive component, and when it goes you may find yourself dropping a lot of cash on a new AC unit. Incorrect Amount of Oil in System Too much oil can cause compressor slugging and a slipping clutch. The procedures for adding oil will obviously vary according to the type of compressor. Replacing the Compressor. The A/C is running fine, with the PAG oil flushed out and ND-11 inside (Now Supercool oil), still no codes. A catastrophically failing compressor can also load up the inside of the A/C system (particularly the condenser) with debris, usually small chips of metal. The compressor stays warm even during the working process, so I think that additives may be destroyed in the operating conditions. Shop the AMSOIL online store by selecting from a list of our most popular synthetic motor oils for gasoline, diesel, European, racing, motorcycle and 2-stoke/4-stroke oils. However, you need to make sure that you have the correct capacitor size. Lubrication: For lubrication of the element and element bearings. York Compressor Oil System Modification. The compressor has a reservoir in the bottom of it, so when changing a compresssor, you need to drain it, measure what you took out and add a couple of ounces more ( due to normal system loss). Understanding available air compressor features helps you choose a model that can handle your jobs and simplify your work: An oil-free pump reduces maintenance and doesn't mix oil into the compressed air. The compressor will work harder in making sure that the refrigerant is delivered through the system, making it more susceptible to breaking down as a result. There are charts as to how much oil to add for a particular component. 80% of the time, if the tank is left with >30psi in it, it is too much to turn over. The only way to determine how much oil is in the system would be to remove and drain all components and measure recovered oil. Central heating and cooling systems are separate things, but they are matched to work together. By all means, don't let the engine turn the compressor without any oil inside it. 25 times more than the weight of oil per unit weight of air. I was brought a XRVS476 with the complaint that the compressor was using too much oil. If all you removed was the leaking condensor you didn't lose much oil so be carefull adding too much. I got the first part …the question okay. Honda CR-V AC Compressor Problems of refrigerant to oil is also often overlooked, by dealers too. depends on your cabin blower speed and how cold the evaporator coil is, the compressor will cycle off when the evap coil hits a certain temp. See Bendix and/or other air dryer manufacturer guidelines as needed. At this site there are eight units, each one looks sort of like a large shed with a giant fan on the end. If too much oil is added, it mut be drained to proper levels. A/C PRO is the easy DIY car A/C repair that saves time & money. The typical size of a vehicle's discharge line, (see column 2 of Table A on page 3) assumes a compressor with a normal (less than 25%) duty cycle, operating in a temperate climate. AC Compressor Oil Question - Toyota 4Runner Forum - Largest 4Runner Forum. What oil do I need and about how much should I put in it ?. If any of the interior components break, or the compressor’s internal bearings fail or seize, then all sorts of noises can be produced as a result. Discount AC Parts Videos Home. Home Air Compressors. Once all of the old oil has been removed, replace the drain plug using an adjustable wrench. Oil or Oil-less Air Compressor? Which one of them is better? We will try to answer this question and compare the pros and cons of each. The ACDC Prius now has 143,000 (was 94K when we tried to break it). His foreman had told him to check the temperatures on their two new air c. It is dispersed throughout the system, so when you remove the compressor, there is still oil in the system and other components. In a rotary screw compressor there are about four or five things you can first look at that don’t really cost you a lot of money. If the oil level is above the dot, you have added too much oil. The binary switch will shut the compressor down if a problem arises on the high side of the system or the low side of the system. When you have accidentally overfilled your compressor with oil, you can't help but have to take it out. If the safety valve is located before the oil separator, check differential pressure of oil separator. Too much oil too much pressure. Too much oil, you slug the system, too little, compressor says "see ya". Contamination. Too little oil in the compressor results in an obvious oil trip. Here at VMAC, we favor serpentine belts. Also check for a stuck metering device. So too much oil in compressor. There doesn't have to be much oil get past the rings into the air flow per stroke for the consumption to accumulate to levels causing grave concern. How Finding Out What Went Wrong Prevents Future Failures Bring that compressor back to the shop and tear it down comes the. This mixture exits the outlet or air end of the compressor where it flows into an oil separator. But the second statement I’m not sure about. How To Use An Air Compressor Set Up Check the Oil. I talking about the compressor crankcase filling up with oil!! Large amounts of oil!!! How is it possible to have too much refrigeration oil in the compressor? It should be a simple procedure. If the A/C system running properly then you don't need to check for oil level and you can't tell if the system is low on oil. Questions/Comments: How much ND-8 oil is in a brand new 471-1166 compressor when it is shipped to a customer? Hello David, Thank you for contacting DENSO. 0001" thick vaporized off the cylinder wall per stroke on a compressor running at 900 RPM for 50 hours per month. pressure switches will cause the compressor to constantly engage and disengage. Orifice tube should be replaced and matched to the refrigerant to be installed. 0 Hp electric air compressors in the industry having only 70 decibels of sound. It will flood the crankcase of the compressor with oil and then the oil will come up past the rings and out the compressor discharge port. This does not always mean the compressor is stuck, but does have a too high rotation torque caused by too much refrigerant or too much oil. This simple fix recharges the R-134a (freon), stop leaks & gets your car A/C cold again. The main danger with too much refrigerant inside an air conditioner is that it can damage to the compressor. Wes, be careful. Level compressor. The properties of the oil selected must be suitable for this purpose. read thoroughly before beginning installation. How to Drain and Add Refrigerant Oil to an AC Compressor (Example on Honda Civic 2006-2010) Omar Q. Discharge and recover Refrigerant. Defective compressor overload which will cause the lube oil control to time out and shut the system down. Refrigeration system is one of the most important machinery systems on board ships that requires continuous monitoring and maintenance from ship's engineers. Pros of oilless air compressors. In an oil injected rotary screw compressor, a 20 F increase in operating temperature can cut the service life of the oil by 50%. com Refrigerant is a gas or light liquid in your air conditioning system so if you added too much oil it is possible the compressor is struggling to move that much oil. If no additional oil is available, remove required amount of oil from the oil separator tank. Recently purchased an Makita 5200 series compressor, instructions in spanish only. Pros of oilless air compressors. Not enough lubricant (oil) The compressor is a type of pump and therefore has moving parts. Oil in compressed air can have various. Maybe your intercooler is cooling the air too much, or not enough, depending if they are using temperature or pressure to detect an air leak in the cooler. Compressor oil is a necessary component in any air conditioning system that uses compressor in its compression system. Besides the correct amount of oil, it's important to use the right type of oil. Important! The compressor oil may be aggressive towards certain gasket materials used in pneumatic equipment. When charging the system I installed five ounces of oil in combination with just under 2 pounds of refrigerant as recommended by the factory. There are three main purposes of the oil. Other compressors have no sight glass or dipstick. In newer equipment, there could be a leak of the R-410A or other working fluid. Instructions from the manual say to put all 8oz's into the compressor but they don't expand beyond that. If all you removed was the leaking condensor you didn't lose much oil so be carefull adding too much. Doing so will force the compressor to run with inadequate oil and can destroy the compressor. If the extension cord is too long it definitely will, since thats not your problem I have another tip, because its my problem. Check the oil level with the dipstick often; it is full when the oil level reaches the notched area on the dipstick. By all means, don't let the engine turn the compressor without any oil inside it. How much are you talking about? A well used compressor will make some oil but still function just fine. If in fact is does have too much oil, removing the compressor again and draining it would be my choice. Just bought a 2012 with a 6. Too much causes reduced cooling, too little and compressor damage. Any left over gets used in the automatic air tool oiler,it works great. A6 / S6 (C5 Platform) Discussion - massive ac leakPAG oil under compressor - I just replaced my old seized ac compressor with a used one. compressor system efficiency and optimize the system energy usage. Your compressor does not have a sump like your engine does, it relies on the proper volume of refrigerant in the system to push the refrigerant oil back to the compressor. Compressor. Has the compressor been running unloaded for an extended time? When a compressor unloads the gas velocity decreases and the line sizes are incorrect for the new capacity, this may result in poor oil return. Compressor does not unload. You should also note if your new compressor came with any oil already in it. It's also why you need to be carefull in terms of what you add. If the compressor starts to leak AC oil or refrigerant it can affect the seals, at which point the full compressor will need to be replaced as these seals cannot be replaced. How much of this oil am I supposed to put in the compressor? The FSM is confusing, saying: "When a new compressor is installed, drain 30 cc (1 fl oz) of refrigerant oil from the suction fitting on the compressor, unless you are also replacing any of the above parts. Valves are preset and sealed for correct settings. Oil in compressed air. Shop the AMSOIL online store by selecting from a list of our most popular synthetic motor oils for gasoline, diesel, European, racing, motorcycle and 2-stoke/4-stroke oils. The Hull Truth - Boating and Fishing Forum Mercury optimax 225 how many hours too much. How to Choose the Right Air Compressor. Volvo refrigerant and oil capacity charts. The blockage may be in the form of: 1. I have used pancake compressors a lot in the past, however, I have looked into going to a double stack compressor (double lung as they are refereed too) Do mostly in that they are more efficient. During the down-stroke of the piston, ambient air is drawn in through the inlet valve, while the discharge valve remains closed. This can happen when components are replaced without an accounting for the oil within them. I have a brand new small R22 Fuji rotary (on/off) compressor which I intend to use for 407C and therefore an oil change to Ester type is neccesary. But the second statement I'm not sure about. Such a failure can cause the compressor to lock up (seize) or wear out prematurely. Injecting Pag Oil Into a Car's Air Conditioning System. Cannabis oil pills need to be refrigerated to last longer. Reinstall the lock washer and nut and tighten down moderately. They are used for lubrication, removal of heat and for sealing. Just bought a 2012 with a 6. Probable Cause: Remedial Action Faulty air/oil separation: Check air/oil separation system; change separator element Compressor oil level too high: Follow manufacturer's recommendation for proper oil level. Compressor head was wore out, and old enough there was no noise abatement at all. What to Do If Air Compressor Pressure Is Too Low. Abnormal noise from compressor Causes. then levels out, High side pressure about 150-170psi. If you choose one that is far too big or small, the capacitor will burn out and can spray the liquid inside of it on the other components of the air conditioner. Oil will leak from there if the oil cannot properly flow through the filter or the oil chamber. Is there a pressure release on engine? Gets to a point I can't even move by hand. Too much oil is in the system. Too much oil can hurt cooling performance. The Basics Air Conditioning Theory The Basics Compressor Facts The Basics Safety Switches Basic Auto Air Conditioning Compressor Facts The next most critical part of an air conditioning system in terms of providing optimum performance and trouble-free service is matching the compressor to the other system components. This might have given a system with a bit too much oil, but I figured too much was better than too little. Too much oil in the compressor can also cause oil trips. The amount of oil poured back into the compressor should equal the desired amount (from the table), minus 0. Lubrication: For lubrication of the element and element bearings. Too much oil in a crankcase can cause damage to a compressor by creating a dynamic pressure during operation. Oil will leak from there if the oil cannot properly flow through the filter or the oil chamber. I was brought a XRVS476 with the complaint that the compressor was using too much oil. The A/C is running fine, with the PAG oil flushed out and ND-11 inside (Now Supercool oil), still no codes. Air compressors can drive power to the nailers. Insufficient oil can cause premature compressor failure. (This is called slugging. New starter and battery. Not much is needed but a very special tool is required for this job. It has a moderately powerful 1. Whether you're working on your house or in your shop, Northern's large range of air compressors is certain to include the right one for you. That said, few aspects of compressor operation are more annoying than periods where the oil expires too quickly. All you need to do is fill the new AC compressor with exactly the same amount that you drained out of the old AC compressor. Compressor tilted too much. Cause: The compressor has been exposed to too much heat due to insufficient refrigerant or compressor oil in the system, leading to overheating of the compressor. Drain the new compressor and. I got a new Denso compressor and I believe it has oil already in it. You can hear the compressor quiet when the system has its required oil. I installed an access port upstream of the compressor. A belt-drive system provides quieter operation than a direct-drive system. If the Super Heat is too high the compressor will run hot. It is also worth saying that my thirty year old Mercedes has a noisy compressor - I've added a little too much oil and I turn the radio up a little but the AC cooled well when I last used it. If refrigerant oil did the same thing—that is, if it remained in the. For example, if you’ve had a slow leak for a year, you don’t know how much oil may have leaked out with the refrigerant. Oil in discharge air. Everything was back to way it was and blows cold. Prior to purchasing an air compressor, be sure to keep in mind what the primary use of the machine is going to be. Its true, the tank internal are oil coated. Once all of the old oil has been removed, replace the drain plug using an adjustable wrench. a : Mono-compressor circuit. Most people recommend to take all the oil out from the oil compressor, and fill the new one. Some compressors have a relief valve for regulating pressure. I can't imagine that compressor not starting on a 50 amp breaker and frankly I think it will start fine on a 40. I had to have my mechanic trace a post-installation leak, which turned out to be one of the two new seals I installed on the compressor. Craftsman 3 gal. I tried vacuuming the system with a decent Robinair pump but it would not get below 20 inches. I do finish carpentry, and home re modeling, as well as wood floors and a lot of trim and finish work. The system that I'm working on seems to have too much oil. Yong Heng compressor maintenance schedule I filled my Yong Heng with a standard compressor oil - better than putting in motor oil, which some of the suppliers are. This is a significant factor. Speedaire ® Horizontal Oil-Lube Air Compressor 1 Description The air compressor pump works with the up and down of a piston in the cylinder. The oil charge. I'm not too much of a fan of high maintenance, but I love it when my equipment lasts long. That is, you weigh or measure the oil removed from the compressor and replace the appropriate amount to maintain the factory recommended amount in the system. I tried to tighten the coupling but it still leaked. The internal parts of the compressor will show uniformly worn and scored bearing surfaces. In the case of compressor, if the oil is charged too much, the compressor driving power will be increased and the compressor overall efficiency will be decreased. The new A/c compressor already comes with the oil. A little extra oil is better than too little oil, and maybe that is part of the thinking behind the recommended oil addition when certain components are replaced - you can't be sure that there is a specific amount of oil in the condensor, evaporator, etc. Per an article I found online the entire AC system with rear ac requires 11 fl oz (330ml) of PAG 150 oil. …Run a compressor over 140 PSI, Compressor works harder with each increasing PSI and are not designed for this. A compressor able to avoid damage while moving large amounts of oil as a result of refrigerant migration during the off cycle may be damaged by other means. Here's Why:. pressure too low. Switching the compressor over to load/unload will increase its overall efficiency. Step 3: Fill up the. Another place from where the oil can leak is from the head of the compressor. AC Compressor Oil Capacity - RedAngel Products. If there is a puddle or more, then you might want to be concerned. How much of this oil am I supposed to put in the compressor? The FSM is confusing, saying: "When a new compressor is installed, drain 30 cc (1 fl oz) of refrigerant oil from the suction fitting on the compressor, unless you are also replacing any of the. June 2012 Two CompressorTech Lee Alexander is Technical Director for Compressor Products International (CPI) in the Americas. Honda CR-V AC Compressor Problems of refrigerant to oil is also often overlooked, by dealers too. I have read that too much oil is not good for the compressor and it can indeed prevent it from cooling as well. If the compressor isn’t starting, your air conditioner may be low on refrigerant, and the compressor may be too hot or broken. By using process simulator, we get power requirement 0. If there is no immediate need for oil-free compressed air, the more economic way is to go with an oil lubricated unit like an oil-injected screw compressor. I also purchased 8 oz. I had to make an adapter for the new filter, but it was well worth the trouble. It would not disengage. no weighing it, easy. Reinforced handle/frame designed to protect the motor housing. But overall, the method is correct. then levels out, High side pressure about 150-170psi. Discharge and recover Refrigerant. Yes, a compressor will also be damaged if insufficient oil is circulating, but it's a gamble to routinely add oil whenever the system is opened without knowing how much oil to add. c : High pressure oil return. Should I worry too much about oil-lubricated pumps?. A low oil charge can also be indicated by a smaller pressure differential (lower high side pressure and higher low side. Is Summer Heat Killing Your Air Compressor? While employed as service manager for an American compressor manufacturer many years ago, I received an urgent phone call from a service technician in the Middle East. Typically when we. It has a moderately powerful 1. The extra refrigerant can also flood the compressor and damage its mechanical components. On very hot days this means a high side reading well over 300PSI. How to Drain and Add Refrigerant Oil to an AC Compressor (Example on Honda Civic 2006-2010) Omar Q. When I attach my guages large amounts of thich oily foam come out. Most A/C compressors lubricate themselves with the freon that flows through the A/C system. Check inlet valve and loading solenoid for good operation. Competitive Price 110kw Kaishan Electric Screw Air Compressor Oil Separator , Find Complete Details about Competitive Price 110kw Kaishan Electric Screw Air Compressor Oil Separator,Oil Separator,110kw Oil Separator,110kw Kaishan Electric Screw Air Compressor Oil Separator from Air-Compressor Parts Supplier or Manufacturer-Quzhou Jugong Machinery Co. It includes 200 max PSI capacity tank, so you will be able to finish most household assignments without too much hassle. Most smaller air compressors these days won't require oil to operate, but the bigger ones probably will. Generally, the optimal amount of injected gas is determined by well tests, where the rate of injection is varied and liquid production (oil and perhaps water) is measured. Why air compressor lubricant oil consumes too much? Air compressor lubricant oil for the operation of the machine plays an important role, but sometimes we will find the compressor lubricating oil will be consumed too much, so what reason caused that air compressor lubricant oil consumes too much?. They allow you to use a smaller horsepower compressor to complete a larger task by utilizing stored energy. Therefore, one doesn’t have to spend too much money on the wear and tear of this equipment and therefore, will save you a ton of money. If any of the interior components break, or the compressor’s internal bearings fail or seize, then all sorts of noises can be produced as a result. 5 hp air compressor: won't auto shut off, builds only 40 lbs pressure, air leaks from the 2 holes in oil filler cap? The compressor will not auto shut off until it reaches the preset pressure which is usually around 100-130 psi - your problem is leakage of air from the oil filler cap suggesting that you have a failed. Per the owners manual, the compressor takes 11 ounces of oil. Need a compressor that’s larger than 50HP? Or help finding something? Atlas Copco’s portfolio doesn’t stop there. if compressor #1,2, went bad because of too much oil Then by the time you put #3 the evap and condenser should have little or no oil left. If your compressor is using too much oil, there could be one of two problems going on: the oil may be leaking, either inside the compressor itself or outside it. Viair 40047 400p-rv Automatic Portable Compressor Kit Auto Part 40047Reviews: Powered direct to the car battery with alligator clamps. CORRECTION: 1. Low Super Heat will either thin the oil so it doesn’t do its job or it enters the cylinder and can’t get out fast enough. Besides the correct amount of oil, it’s important to use the right type of oil. If the compressor has more than a 1 inch diameter area of sweat as the suction line enters the compressor it is over charged. On very hot days this means a high side reading well over 300PSI. Whereas, Mattei’s rotary vane airends never run too fast and deliver better energy efficiencies as they slow down, which lets you turn up your savings through lower operating costs at comparable flow rates. The manufacturer recommends a specific amount of oil for an ac compressor. We Can Fix Engine Oil Leak – Find a Meineke Shop Nearby. Turn the air pressure regulator knob (D) counter clockwise until it stops. Regulate compressor oil: For optimum performance, after 500 to 1000 hours, it is obligatory to change. This 20-gallon air compressor produces a maximum psi of 150, including 5. CO2 extraction is the cutting edge of the cannabis industry. I can't imagine that compressor not starting on a 50 amp breaker and frankly I think it will start fine on a 40. Then drain the pressure tank. If too much oil is added, it mut be drained to proper levels. How to Drain and Add Refrigerant Oil to an AC Compressor (Example on Honda Civic 2006-2010) Omar Q. You need to stop because you don't know how much oil you put in there. You can check through the sight gauge, which is usually at the bottom of the compressor motor, in most models. I have no idea but i was told by Quincy not to use motor oil of any kind in the unit. The system that I'm working on seems to have too much oil. If not a sight glass like the one in the photo above, then the cap of your oil fill port may also contain a dipstick. Too much or too little injected gas will result in less than maximum production. pressure switches will cause the compressor to constantly engage and disengage. Additionally, it includes a 5-piece tool set. Rotary screw airends are very sensitive to variations in speed. Compressor head was wore out, and old enough there was no noise abatement at all. The system is designed for a liquid-gas balance and too much liquid, refrigerant or oil, hinders evaporation that provides cooling. c : High pressure oil return. In order to use these compressors for pumping air, you need to have an external oiler feeding air into the intake hose and a filter to remove the oil from the output hose. When the sliding weight of this instrument is set to a given notch, say for 40 m. I have read that too much oil is not good for the compressor and it can indeed prevent it from cooling as well. 26 thoughts on " What Causes a Turbo To Blow, Leak, or Burn Oil? Find Out HERE! " Dr. be carefull, if its a new compressor, than it needs oil and it's tricky, because you don't know if someone else has added oil, and how much is in the lines etc too much oil can cause problems. Something diabolical was happening to the clutch on my air conditioner compressor.