The voltage at the disconnect is 235V and there is a drop of 10V when starting the compressor. Learn more about the 4th Annual HVACR Training Symposium or buy a virtual ticket today athttps://hvacrschool.com/symposium. If the ice maker usually overflows, there is a possibility that the problem is with the flow sensor. This is because the dirt prevents the dissipation of heat from the refrigerant. Compressors are equipped with internal overload devices which open on a rise in temperature. S-G = 1.5 ohm R-G = .5 ohm C-G = 450 ohm Just trying to visualize what's going on here. Again, let a repair technician fix it. If you do not hear them, the compressor may be faulty. You are using an out of date browser. For the LG linear compressor, one side should have 7.5 ohms of resistance. . Add in the fact that the applied voltage across the run winding is actually higher than the L1-L2 voltage due to back EMF (CEMF), and it's enough to confuse anyone. If anything blocks the air vents, it will cause the cold to circulate poorly. I already publish a post about the start, run, and common identification guide on this blog. If you want to learn more about inductive reactance, please check out this article HERE. Including recorded tech training, interviews, diagnostics and general conversations about the trade. Bear in mind that when your refrigerator is in the Display/Demo mode, it will be on but wont cool. You will be using the ohms function on you digital multimeter to troubleshoot the compressor, and having power applied to the circuit under test gives false readings and damages the meter.. Check the condenser coils for dirt and clean them if they are dirty. We are taught that resistive loads (loads that create light and heat) are much simpler. However, the ideal temperature for the fresh food compartment is 37F and the freezer 0F. Check the start relay for arcing or overheating. System is over 12 years old. Hi-Side Pressure is fine. To resolve it, check the connection between the ice maker sensor and the fan motor with the control panel. An ultrasonic leak detector picks up the sound of refrigerant and air leaking out of a hole to pinpoint the leak. I had a look at the data sheet of the compressor (NJ2212GK) and the resistance rating for the start winding is 7.25 ohms, the rated resistance value for the run winding is 1.95 ohms. There is not one standard ground resistance threshold that is recognized by all agencies. Watch and learn how to diagram Ohms on a compressor. Let's look at a heat strip. How Do You Reset An LG Refrigerator Compressor? New guy here. The linear compressor is designed to be energy-efficient. Where the normal operating current draw on a conventional compressor is somewhere between 1 and 2 amps, LR current could be somewhere north of 8 amps. A shorted motor will read 0 ohms across windings, to ground, or both. That means that the resistance of a tungsten incandescent light bulb increases 10 to 15 times its cold temperature to its hot temperature. Now, check the temperature display panel and confirm that you have disabled the Display/Demo mode. PTC Danfoss 103N0003 - 115V (originally white ceramic, top half looking rather brown now) plugs onto the compressor and applies 6.9 Ohms (cold) across the compressor pins that measure 17.9 Ohms. Replace it. You will see different numbers appearing on the screen. Advanced AC & Heat Pump Diagnostics. S-C = 450 ohm R-C = 450 ohm S-R = 2 ohm Measuring to ground is goofy too. Purchase a new compressor motor if your ohm readings are high. Incandescent light bulbs are a resistive load, but they are also made with a filament of the element tungsten, which has PTCR (positive temperature coefficient resistor) properties. The resistance between start(S) to common(C) is typically three-to-five times higher than run to common winding. Although it is uncommon for the compressor to be the cause of refrigerators not cooling, we cannot overlook it. A megger sends voltage through a cable and measures any current leakage in megohms (1,000 ohms). High Pressure Pumps Visit category overview; Desalination; Due to an ERP system upgrade, all Drives configurators will be disabled from catalog from 25 February - 6 March 2023. That sounds like a burned up compressor that is also shorted. No store found for that zipcode and search radius. $17.46 $ 17. If abnormally high, one possible cause (among many) could be damaged conductors due to burning or corrosion. I have a husky 7hp 60 gallon compressor and I have voltage to the switch and from the switch to the motor on both legs I have voltage to both capacitors and I replaced the start . These error codes show the door motor does not move to the home position within 5 seconds. LG Refrigerator Compressor And Fan Not Running Solutions. So the readings I get are not 'so' off but there are a bit off. And yes it's a 49F, and yes they are crummy. When the mullion flap on the doors does not lap well, the door wont seal properly. How to Find Out start, run, and common in compressor terminals? Here are things you should check when your LG refrigerator compressor is hot to the touch: Check the working condition of the temperature thermostat. MI mechanical license since 1998, 99% residential experience. In this post, you will learn about checking compressor windings or testing compressor windings. Other times, the problem with the fan can be loose wiring or a faulty fan motor. Were dealing with electricity here; dont mess around! Disconnect the water supply line from the inlet valve. The low pressure side switch is located before the AC compressor, while the high pressure switch comes after the compressor. No appointments or charges! So, you need to find out where the leak is from, fix it, and then refill the refrigerant. The only overload protector is the one mounted to the compressor. Otherwise, the refrigerator will require a service repair. Now if your compressor terminals reading shows the same as in the above post then your compressor winding is not burned or if its shown different reading between common, start and run then your compressor winding is burned. MI mechanical license since 1998, 99% residential experience. So, if you had 2.3 ohms between Common and Start and 1.7 between Common and Run, you should have about 4 ohms between Start and Run. The leveling of the refrigerator can also affect the sealing of the doors. There was a blown fuse initially, but the replacement fuse did not blow. You can also call it the overload switch or overload relay. Where Is the Compressor Located On an LG Refrigerator? Measure and record the resistance (ohms) measurement of each winding; Click the image below to download your free compressor troubleshooting chart! To fix an LG linear compressor fridge that is not cooling, check the following: Unplug the fridge, disconnect the water supply, and move the appliance away from the wall. JavaScript is disabled. It takes a lot of measurements and math to figure this all out. Fenestration loads include heat losses and gain through windows, doors, skylights, etc., and they can make up [], 2023 - HVAC School | All rights reserved. (note that direct wire was connected in those single phase compressor, in which the overload protector is instilled internally). Use the Ohm setting on your multimeter and measure between the signal and the ground pin. Note: A refrigerator that uses an R600A gas is most times referred to as a green refrigerator.. Turn the range down on the ohmmeter 1 step at a time to test the circuit. It is true the compressor is hot when it is running. But if the blades spin freely, check the fan motor. When there is a shortage of refrigerant, the compressor will work twice as hard to keep the refrigerator cool. Open the refrigerator and turn off the freezer and fridge controls. Return the ice bucket to its position and leave the ice maker for 24 hours. Fully Charged. Note that you can only do this if you have an idea of what the resistance of what youre measuring ought to be. Any reading above 1.25 is considered excellent. How to Market Your Business with Webinars. Breakers tripping fuses blowing, no start condition. The reason this happens is that the thermostat monitors the temperature within the refrigerator. The top compressor pin is common, bottom left start, bottom right, run. After starting the car the air conditioner is working and then quits at different intervals. With the system pressure lowered, it is now safer to remove the plug and test the compressor terminals directly. Continue this process with the start and run terminal. If it no longer laps well, it may be defective. Since linear compressors are energy efficient, they emit less CO2 hence, having a less negative impact on the planet. 425 SERIES - these 1/4 HP air compressors. After you access the relay and compressor on your fridge, use a multimeter to test the ports to make sure it has a low resistance. So when it fails, the compressor may be working normally, yet overheating. The M symbol may appear in the display because the resistance of open (unattached) test leads is very high. But if you want to test compressor winding then follow the below steps. The compressor is an important part of the cooling system; it compresses the refrigerant and circulates it within the coils. Additionally, when the refrigerator does not cool properly, check the compressor. How to Find Out start, run, and common in compressor terminals? In the case above, a compressor/fan motor/contactor coil, etc., is an inductive load. How many watts of power will be used? I guess since it's a brother of a friend the reality of it is he's trying to save money by not calling a company out that would want to get paid full price so he bothers you in your free time. Right, it's just I would expect a much lower resistance with a shorted winding. The higher the resistance, the lower the current flow. Hi guys, just to give an update. The initial start-up in the field is a very critical period for any compressor because all load-bearing surfaces are new and require a short break-in period to carry high loads under adverse conditions. The solution to your LG refrigerator compressor and fan not running is to change the parts. The refrigerator is about 1980 Amana model ESRFC16E mfgr number P7464514W. This error code pops up when the auto door motor is working, and the reed switch is ON. Here, the piston will move along this linear track to reduce the loss of energy and minimize friction. 1 Kilovolt (kV) high-power alternating current (AC) and direct current (DC). This code indicates something is wrong with the condenser fan; the feedback time from the fan is below 65 seconds. Note that when the refrigerator shuts off, you will likely hear a whooshing or knocking sound. Unfortunately, if the start relay malfunctions, you can only replace it since a start relay is unrepairable.