(Note that when thermal overload temperature is high it's make an open circuit, so the best method is to cool the thermal overload protector and when it's cool test it by using the multi meter. Welcome back to the refrigerator topic and in this post, we discuss the overload protector which we use to protect the refrigeration compressor. Ultra Durable 6750C-0004R Refrigerator Overload Protector Replacement Part by Blue Stars - Exact Fit For LG & Kenmore Refrigerators - Replaces 6750C-0005P. You may need to use a pair of needle-nose pliers to remove the connector. Locate the ports on the side of your PTC relay that have the letters M and S above them, which are usually the ports that connect to the compressor. Try to start the unit. The location of the overload protector is with the start relay on or near the compressor. The overload protector should be checked for continuity or by bridging the two contacts as described for the control switch (Figure 46). Push the spring clip that holds the piece in to the side with a screwdriver and insert the new overload protector. In most cases, you won't need a screwdriver because the cover is held in place with tension clips or retaining clips which can be manually loosened. Pull the connector firmly off of the relay terminal (do not pull on the wire). If it costs more to repair the refrigerator than it would be to just buy a new one, there's really no point to fixing the fridge. Continued from page 1. The overload protector can be accessed by removing the terminal cover box. 3. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Do not pull on the wire itself, but on the attachment clip with a needle nose pliers. FREE … If the part is solid state, then you will have to have a professional test the part, as it requires specific equipment for testing. Continued from page 1. Caution: Please read our safety information before attempting any testing or repairs. The overload protector sits near the condenser by the current start relay and ensures the condenser does not overheat while working. The compressor overload protector is located near the back of the refrigerator, so you will also need to pull it out and away from the wall. 1. What is Overload Protector and How it works How a PTC relay Works in refrigerators compressor Check the supply wire of Refrigerator If your refrigerator wire have internal damages or open circuit, then this also a big reason of refrigerator not cooling. If … With all switches in the ‘off’ position, attach the Three motor leads of the test cord to the compressor terminals. As you know that thermal overload protector is designed to protect the refrigerator compressor during over current flow. Contact us to obtain. QP2-4.7 Starter Relay(2PCS), QP2-4r7 Relay and Overload, 4.7 ohm 1 Pin Refrigerator Starter Relay and 6750C-0005P Refrigerator Overload Protector, Compatible with Mini Fridges, Deep Freezers. What are the overload protectors and their function in the refrigerator … Note: As mentioned previously, there are many different types of overload protectors, start relays, and combinations. Next, push or flex the metal box in the lower right rear of your refrigerator to disengage it. First ensure that no capacitor in the circuit is defective or shows signs of leakage or damage. In either case a replacement compressor will be required. Step by step instructions on how to replace a Compressor Overload Protector #6750C-0005P for Refrigerator made by Kenmore, LG. Power is applied to the compressor motor windings through the overload device, and the relay is used to add the start winding in the circuit until the compressor is at running speed. The start relay is located inside the same compartment with the compressor and is plugged into the back of the main device. It should be tested with a capacitor tester if available. Check for continuity by removing the relay and measuring the resistance across the relay coil (see Figure 51). 5. Try to start the unit. The overload protector is accessed from the lower rear of the refrigerator. Once it's removed, you should see the refrigerator relay system. At this stage the compressor will be trying to start on the run winding only and a humming sound should be audible. If the compressor is cold to the touch it is evident that it has been idle for some time. My unit one blinking 1 time. i've replaced the start relay and overload, continuity tested the compressor, plugged in to different electric circuit, jumpered past the thermostat, the condenser coils look clean, the compressor is not hot to the touch, it does start and run for a couple of seconds before the overload trips out, its a jenn-air side by side about 10 years old Posted in Refrigerator electrical equipment and service, Tagged with Capacitors, Electrical test procedures, Overload protector, Refrigerator Repair, Refrigerator Troubleshooting, Supply and control switch, Test cord, Windings, The Journalist template by Lucian E. Marin — Built for WordPress, Refrigerator electrical equipment and service, Condensing Unit And Evaporator Not Working, Refrigerating Superheating and Subcooling, Refrigerator Oil Bleed and Rectifier Schematic, Crystallization Absorption Refrigeration Systems, Domestic refrigerators and freezers troubleshooting, Refrigerator electrical circuit protection, Refrigerator fault finding guide for vapour compression systems, Refrigerator operating principles and symptoms, Refrigerator service diagnosis and repairs. Note: This video is intended to give you the general idea of the part replacement procedure. (If two start capacitors are fitted, connect them in parallel.) When capacitors are included in the circuit they should be connected in series if a test cord is used; Figure 48 shows a start capacitor in series with the start winding. The overload protector is accessed from the lower rear of the freezer. 2. If the compressor starts when the start winding is in circuit but stops when the bias switch is released, the run winding is defective. Failure to start at all means that the start winding is defective. In this case the reading is taken between terminals 2 and 5, but this may differ according to the relay type. Then release the bias switch; the compressor should continue to run. eKoi Universal Aftermarket Part QP2-4R7 4.7 Ohm 3 Pin Refrigerator Fridge Freezer Beverage Cooler … Take off the cover to the box by loosening it with the appropriate screwdriver, if necessary. Overload Combination Features/Benefits • Equipped with an electro-mechanical relay, locked rotor protector and a 255 mfd start capacitor. 7. Disconnect the power to the refrigerator … shows that the capacitor is functioning within the design rating. Ensure that the earth lead of the test cord locates to the compressor screw and makes good contact. This test will only be effective if the capacitors are serviceable, and is similar to using a test cord. Should a capacitor show any signs of leakage or damage to the outer casing, it should be changed. The jumper wire should include a bias switch for safety. Always unplug your appliance before starting any repairs. Put one of the probes into each slot on the relay at the same time and check the reading on your multimeter. If there is supply to the input side of the control, bridge out the control contacts with a jumper wire or join the two control wires together; this will effectively take the control out of circuit ( Figure 45 ) 3.8 out of 5 stars 24. A maximum deflection recorded on the ohmmeter indicates that the compressor motor is down to earth, and will probably blow fuses when the windings are energized. DISCLOSURE: This post may contain affiliate links, meaning when you click the links, we may receive a commission. A physical test of the start relay can be the most effective way to determine whether it's working or not. Access and remove the old compressor overload protector. Next took of the back panel and put the system into diag mode. Release the start switch when the motor is up to speed. Your appliance may differ depending on the manufacturer and model. The multitester should display a reading of zero ohms. Replace the … The overload protector is accessed from the lower rear of the refrigerator. The overload protector is designed to protect the compressor motor from damage. With the test cord connected, switch on the power supply. The connection procedure is as follows: 1. Ensure that the control switch is set to the on position, and check the 4. After 15-20 seconds the motor will trip out on the overload. If the unit fails to start with the test cord it could also mean that the capacitor is unserviceable. If the compressor fails to operate it must be replaced. The compressor is labeled "A", the overload protector is located in the terminal box which is located at the position labeled "B". The voltmeter should be connected across the capacitor terminals as shown in Figure 50. Just remove the relay from the compressor and then remove the compressor overload protector. Another means of testing a capacitor is to connect it across a 50 Hz supply in series with an ammeter and several lamps to provide a resistive load. Overload protector. Replace the relay and switch on the unit. Before working on your refrigerator, always unplug the unit or turn off the circuit breaker that powers it. If the check shows that the continuity and resistances are satisfactory, connect a test cord (see Figure 48). Do not touch the terminals until you have discharged the capacitor. Switch on the unit. Place a probe on each terminal. Before testing the compressor motor, unplug the freezer to avoid an electrical shock hazard. See back of the refrigerator for a sticker with what the number of blinks means. Pull the wires that clip onto the piece away from the protector. electrical supply to the control. The technician should get the correct replacement part by using the model, series and other information off the refrigerator and compressor tags. 1. The next highest resistance value between two terminals is the value of the start winding (start and common terminals). Ideal for compressor of air-condition or other electric protection appliance. Set the multitester to the ohms setting X1. A high resistance should be recorded. Copyright © 2000 - 2021, Acme Parts.com, Inc. All rights reserved. Check the compressor windings for continuity and resistance values (Figure 47). • Increases torque to its maximum capacity Applications • Select the right match to replace refrigerator compressor relay and overload units from 1/12 through 2/3 hp, 115 – 230 VAC. 3. The overload protector (labeled "B" below) is connected by two wires. Hold the bias switch in circuit for approximately 5 seconds to allow the compressor to reach its design speed. Before testing the compressor motor, unplug the freezer to avoid an electrical shock hazard. 2. Step 5 Touch the leads on your digital multimeter to both sides of the thermal overload switch. The biggest component is the start relay. $10.21 $ 10. 6. The larger hermetic and semi-hermetic 220/240 volt a.c. 50 hertz capacitorstart/ capacitor-run motor compressors draw considerable starting currents and it is advisable to use a heavy duty test cord similar to the type shown in Figure 49 when testing a compressor operation. Isolate the unit and install a jumper wire across the switch terminals, in this case between terminals 1 and 2. The overload protector can be accessed by removing the terminal cover box. Unplug your refrigerator. Turn on your digital multimeter and set it to read Rx1 resistance. 1.Refrigerator Overload Protector attaches to the compressor and shuts off the compressor if the compressor motor draws too much current. QP2-4.7 PTC Starter Relay 1 Pin Refrigerator Starter Relay and 6750C-0005P Refrigerator Overload Protector Compatible with LG Refrigerator Compressor, 2 … It must be emphasized that this method must not be used to select a capacitor. Attach the appropriate capacitor to the ‘run capacitor’ leads of the test cord. In this post, you will learn the function of an overload protector and its working principles. This my refrigerator overload keeps tripping out. How To Test the Overload Protector. The compressor should start. If the overload protector senses that the compressor is approaching failure from overheating, it will temporarily shut the compressor down to allow it to cool. Remove the rear bottom access panel. 2. The overload protector can be accessed by removing the terminal cover box. 4. The digital multimeter is an electronic device that tests the continuity of your thermal overload switch to help you determine whether it is faulty. The compressor is found at the lower rear of the freezer, with the exception of the high-end, built in style refrigerator-freezers on which the compressor is usually on top. If the compressor fails to start, check the supply voltage at the compressor terminals or at the relay terminal board. Buy relay overload refrigerator and get free shipping on B40-120B AC 220V HX1/4HP Refrigerator Overload Thermal Protector Relay Starter Also, if the compressor uses a capacitor, it may contain a lethal electrical charge. Move the ‘run capacitor’ switch to the ‘on’ position. Isolate the unit electrically and remove the electrical leads from the compressor terminals, or the relay if it is a push-on type. Capacitance in microfarads (uF) is given by (amperes/volts)x 3200. For example, suppose a capacitor rating is 80-105. Inside the box is the overload protector, and the start relay. If the contacts are stuck open, a humming sound should be heard; the compressor is trying to start on the run winding only. Get it as soon as Mon, Apr 5. Answer Leland, The 22 code is just stating that it is in test mode 2 by you pushing the button on the control board. Hold the start switch at the ‘on’ position and move the main switch to the ‘on’ position. The lowest resistance value is that of the run winding (run and common terminals). Test the overload protector for continuity using a multitester. The overload protector is accessed from the lower rear of the refrigerator. This means that the relay contacts are stuck open. If the compressor runs on the test cord, then the fault may be in the overload protector or starting relay. 2. The cover is held on by tension or with a retaining clip. Do not touch the terminals until you have discharged the capacitor. 21. The highest resistance value between any two terminals is the sum of two winding resistances (start and run terminals). If the overload protector does not pass this test, it should be replaced. Also, if the compressor uses a capacitor, it may contain a lethal electrical charge. Do not touch the terminals until you have discharged the capacitor. Then, press on the relay itself and pull it out to remove it from the refrigerator. The overload protector should be checked for continuity or by bridging the two contacts as described for the control switch (Figure 46). (Press energy save button and fridge button for eight seconds system ding once a second and inverter board red LED will blink a code or be on solid if no issue. page 3 of 3 Use a flathead screwdriver to press down on the space between the relay and its casing. PTC Relay is the main part which start the fridge compressor, When ptc relay stop working the … Connect the test cord to the mains supply. 2.Highly reliable performance. One wire connects to the compressor relay (labeled "A") with a slip-on connector. Put the probes in the M and S slots on the relay to check for open resistance. If the mains supply is 240 V 50 Hz and the current drawn is 7.5 A, then (7.5/240) x 3200 = 100 uF. Compressor Problem If a zero reading is recorded then the coil is open circuit. The compressor is labeled "A", the overload protector is located in the terminal box which is located at the position labeled "B". How To Test the Overload Protector. The compressor is labeled "A", the overload protector is located in the terminal box which is located at the position labeled "B". This unit does have an overload protector which is part number 6750CL0001D but would not have anything to do with the condenser fan motor running. Sign up to receive our free Maintenance Reminder Newsletter. 1. Attach a known good capacitor of the correct microfarad rating to the start capacitor leads of the test cord. Depress the test cord bias switch to bring the start winding in circuit, and hold for 2-3 seconds. 3. The overload relay is a protection device used in the compressor circuit on your refrigerator. Check the electrical supply at the power point, the fuse and the fuse rating. 8. If the compressor is cold to the touch it is evident that it has been idle for some time.

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