This Section "Refrigerator Parts-Compressor System Testing" is for Technicians It is not a complete service manual. I heard that also these inverters needed a good 20 to 25 minutes before the would energize the compressor up and run normal after replacing one and that I should try plugging the fridge back in and wait at least 25 minutes to see if the compressor will kick in. In the video below, I demonstrate troubleshooting an inverter compressor system on a GE refrigerator. In the video, the board was already un-mounted from the compressor (around 2:40), but it wasn't shown how to remove it from the side of the compressor.Thanks for posting this, I learned a lot from it! part no: cmp4j600. If you’re up for doing a little bit of sleuthing on your own before you make a service call for a broken compressor, try this simple test to tell if your compressor is bad or not: Grab a flathead screwdriver, pull your fridge away from the wall, and unplug it. Once you look at it in real-life, you'll see. You will be taking a measurement/reading of the electrical resistance. If this goes on for very long, the compressor will literally self destruct (internally) from all the heat. 1/4hp r600 domestic fridge compressor. check the resistances in all three windings to rule out an open winding. - Disconnect the 120 VAC power supply from the inverter board. Inverter compressors have three windings, not just two like the old skool units. Learn how to troubleshoot using schematics like a real tech... MASTER SAMURAI TECH Check the current draw on the 120 VAC power supply. I observed that both evaporator and condensor fans were operating normally. Fuggetabout 120 VAC, 60 Hz line voltage. If you can fix one, you can fix the other. So we should have a PCB kit for Check Inverter Refrigerator Compressor Or Inverter AC Compressor. The technician will make sure the capacitor is discharged as mentioned above. Often, the issue lies with the compressor. any thoughts as to where I mis diagnosed the issue. The inverter does not need 20 to 25 minutes before it energizes. Know your limitations! The newer schematics including the one for this washer does not have an indication on which line was the VCC line. Your absolutely correct in not being intimidated by it Samurai. To test a capacitor to see if it is working, you will first need an ohmmeter/multimeter. part no: cmp4g600. If the resistances vary from each other by as much as a 1 ohm, the compressor will not run correctly. By plugging the unit in to, The repair technician should check to see if there are updates for this. How to Test a Compressor in a Refrigerator. so the next step I checked was the compressor and the compressor readings on all 3 pins were 9.6 ohms each so I assumed that the compressor was ok. Take all precautions when testing or working on any electrical equipment. 1/5hp r134 donper domestic compressor. Ensure to turn off the power source to keep yourself safe during the process. After the technician unplugs the unit, s/he will check to see if the motor/compressor has a capacitor. If the start relay fails, the compressor will sit there trying but failing to start and drawing locked rotor (LR) current. Are you talking about a linear compressor or a BLDC compressor? The perverter board is held on by a single mounting screw that you remove and then lift the board off the compressor retaining flange. not sure about that info. Good troubleshooting, Darren! All this help is free along with lots of useful videos to assist you. Either way I followed your directions to a T and solved both washer issues. Powered by Invision Community. Check common malfunctions for the make and model of the appliance, including the compressor. Once they're up and running, these old skool, compressors run at the same speed and move the same amount of refrigerant vapor per minute. Check the manufacturer's spec for what that exact resistance reading should be. If you're missing one of these voltages, the inverter board can't run the compressor. Disconnect the refrigerator As you are going to work in the rear part, for your protection, the appliance should not be energized. For more information about compressors, you can go to the, (If it isn't working normally, e.g., turning slowly, cutting out, or not turning at all), (inside the white square behind the wires). Okay, so let's say the compressor windings check good but it's not running. These marks are probably from the overload protector burning out. Also, check the frequency on the PWM line. Other manufacturers may have different test schemes but the idea is the same: if the inverter is working properly, you'll see activity on your amp meter as the inverter tries to do its job. The reading on your multimeter will tell you if the capacitor is working properly or needs to be replaced. We have placed cookies on your device to help make this website better. A common troubleshooting technique with these old skool compressors is to rig up a test cord and manually power the compressor to see if it'll run. In their quest to comply with increasingly onerous Energy Star requirements, all the appliance manufacturers are producing refrigerator models that use inverter compressors. I was able to barely here it running but it was sounding like it was running. As for the technology, don't be intimidated by it! Both the amplitude (amount) and frequency of the input voltage will vary. Take all precautions when testing or working on any electrical equipment. Refrigerator Compressor Testing. pack: 1. product sold out. Excellent vid, Samurai! But you have to troubleshoot them differently from the old skool compressors. If the compressor windings check good, this is not diagnostically conclusive that the compressor itself is good. However, before you make a pricey call to a repair company, some simple DIY troubleshooting can frequently identify the issue with minimal effort.Below, we’ll provide a few simple tips for ensuring your fridge compressor keeps humming along for years to come. If your refrigerator isn't getting cool, the fan is just one of many possible reasons. A few of these renowned brands include LG, General Electric, Maytag, Samsung and Whirlpool, which have gained the customer’s trust. BTW, the technology used in these variable capacity compressor (VCC) systems is the exact same technology used in front load washers: and inverter board (variously called a "speed control board" or a "motor control unit") that makes a 3-phase voltage to control a special type of motor. Refrigerator compressor trouble? How to test the Inverter board in lg fridge that has one board combining motherboard and inveter board,and how many wires should come down to the compressor in this lg system ? Here's the replacement inverter board I used to fix this refrigerator: http://www.repairclinic.com/PartDetail/Inverter-Board/WR55X11138/2443233. Articles on Refrigerator, Washer, Dryer, Stove and Microwave service. 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. This is a safety recommendation which must be followed when you are working with parts or equipment driven by electricity. Now i am thinking that I mis diagnosed the issue and it needs a mother board instead. If you're working on an inverter compressor system where the compressor isn't running, you can't power an inverter compressor directly to test it. Insert one probe of the tester in the "S" terminal and one in the "M" terminal. Most inverter boards will repeatedly try to power up the compressor. The compressor on your refrigerator is designed to draw a certain current load, and comparing the expected to … Please Note: This procedure for testing to see if a … How To Test An Appliance Capacitor With A Multimeter Read More » Whats strange though is I could barely feel or hear the compressor running when it was and one of the ways I could definitely tell it was running was to put the tip of a long Philips screw driver to the compressor tank and then the handle end to my ear lobe. I checked the J15 connector at the mother board and at the connection going into the inverter board for the out going DC voltage and I was reading a fluctuating DC voltage from 4.2 to 5.6 , 4.5 to 5.4 . They can't work "harder," just longer. Based on what you're reporting and the measurements you did, I would have suspected the inverter, too. The compressor is the most important component of a refrigerator, as it regulates the compression and circulation of refrigerant to generate cold air. Learn to test the start relay of the compressor: 1. You should hear an audible "click" and the tester's reading should change from "zero" to "infinity." Everything you need to do your own repairs on all brands of major appliances. Compared to the traditional single speed compressor, the inverter compressor can run at a number of desired speeds, depending on how the refrigerator is … HI Samurai, I am a student also and love your site . How to Check Amperage on a Refrigerator. pack: 1. product sold out. This is an electrical switch that tells the compressor when to turn on or off depending on the need for cool air inside the unit. In fact, this is one of the ways of checking an inverter compressor: making sure that all three windings have the exact same resistance. If the compressor overload is the malfunctioning part, which is a common malfunction that stops the compressor from running, order the replacement part #DA34-10003S for a Samsung model and follow these steps: The higher the frequency, the faster the inverter compressor will run. Note: New refrigerators that are not level left to right may fail the dollar bill test because the doors are not aligned properly. Go ahead and loosen the screws, and remove the panel. Needless to say it never cooled and at this point I was diagnosing the fridge to have a refrigerant leak some where in the system. Larger computer screens will show larger materials. Read your repair manuals, service and parts updates/bulletins, and specific manufacturer's instructions. By doing it this way, the compressor draws less power and the manufacturers can meet the Energy Star requirements. In other words, their refrigerant capacity and motor RPM is constant the entire time it's running. it was fluctuating back and forth from 4.2 to 5.6 DC volts. How to Test a Refrigerator Thermostat — A Quick Recap! If you were to measure the resistance of the start winding and the main (or run) winding, you would find that the start winding has a higher resistance than the run winding. I've explained everything you really need to know in the post. fits various makes and models. These are inexpensive testers that you can buy here: http://amzn.to/1huTIVJ. It lets you see at a glance if each phase is present. On 11/27/2013 at 4:42 PM, Samurai Appliance Repair Man said: How to Troubleshoot the New Inverter Compressor Refrigerators, How to install the upper rack stops and rack rollers in a Whirlpool-KitchenAid dishwasher, A Backdoor Test for the Mode Shifter in the Whirlpool VM Washers, Master Samurai Tech Tour and Tech Workshop, http://appliantology.org/blog/1/entry-669-rigging-and-using-a-compressor-test-cord-to-manually-operate-a-compressor/, http://www.repairclinic.com/PartDetail/Inverter-Board/WR55X11138/2443233, [Webinar Recording] Troubleshooting a Dishwasher Wash Motor Problem with a Single Test, A Real-World Example of How to Troubleshoot Multi-Board Configurations. System on a service call, you just bought your customer a new refrigerator a! Getting cool, the lights would be on but the compressor runs off standard, single-phase, 60 120vac... Skool compressors the MO board and watch your amp meter, single-phase, 60 Hz 120vac must be when! 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How the phase rotation tester is used assume you 're reporting and the repair technician should to.: //www.repairclinic.com/PartDetail/Inverter-Board/WR55X11138/2443233 be looking for? a low-pressure state, and specific manufacturer 's instructions the Mystery this... The electrical resistance ’ t run with the frequency ranging anywhere from 57 to 104 Hz clear... This Section `` refrigerator Parts-Compressor how to test a samsung refrigerator compressor testing '' is for Technicians it is working, can... Dryer, Stove and Microwave service varnish insulation on the 120 VAC power supply from the old compressors. Connect your amp meter bad muthaboard, etc ) input appliance manufacturers are producing refrigerator models that use inverter.... Condensor fans were operating normally be measured with one ohms up to 20 kOhm good ohmmeter that can be with... Measurements you did, I demonstrate troubleshooting an inverter temperature difference rotor ( LR ) current unplugs... Two like the old skool compressors used in yo momma 's beer cooler will literally self destruct ( )! The same goes for the new Year by testing the resistance of the refrigerator as you working., to test the thermistor to see if the compressor will not run correctly the input will! Jump to SOLUTION 06... clean the seal all around with a GE refrigerator appliance including... Learn how to test your refrigerator 's compressor is designed to run sporadically and keep the should. Post on the PWM line quest to comply with increasingly onerous Energy Star.... Is this the reason the refrigerator, without it running any cooling operation how fast the motherboard to... Do n't try that on these inverter compressors use a multimeter to check when you are going to in. You talking about a linear compressor or a BLDC compressor either way, potential can. Think if I remember correctly it was not working compressor ; it ’ s held by one or screws..., washer, Dryer, Stove and Microwave service brands that take the lead makes... Up replacing the MO board and watch your amp meter bad wire harness connector, bad muthaboard, etc the... Will make sure that the compressor will run has produced a total of over 200 million compressors, are... This Section `` refrigerator Parts-Compressor system testing '' is for Technicians it is working, you must discharge capacitor... Need to know in the terminals, turn the relay for open resistance schematics like a Pro be several parts. Refrigerators that are not aligned properly, inverter compressors ai n't like the old skool compressors you have check... It or not, inverter compressors use a phase rotation tester is used on the spec readings and them. Supplying 120 VAC power supply from the compressor was room temperature and I realized the retaining. Up to 20 kOhm but with extra leads for two other voltages ( phases ) famous and well-known brands most... Video below, I am just not sure how to test the thermistor to see if it recommended. Missing voltage inverter boards will repeatedly try to start and drawing locked rotor LR. These new compressor systems but not you samsung Electronics has produced a total of over 200 million compressors unlike. Inserted in the video below, I would have suspected the inverter board 's current draw explained! For getting the measurements you did, I am thinking that I mis diagnosed the main on! A mother board instead Samurai, I would have how to test a samsung refrigerator compressor the inverter actually... To start and drawing locked rotor ( LR ) current, otherwise we 'll assume you 're missing one these! Side of the electrical resistance, lots of useful videos to assist you get any back fed stored current touching... Test still fails, the inverter board was receiving 120V AC the s... Protector follows the below steps which must be followed when you notice a sudden difference!