The refrigerator compressor is stuck, how to start it quickly at home

How to wedge a refrigerator compressor

I use a wedging machine. I found the diagram in a book, assembled it myself - nothing complicated. 50% helps. I’ll be at work on Monday, I’ll take it and throw it off.
Yes, it’s really too small, thank you, of course, for your response, but if it were larger and more detailed, it would be top class. thanks in advance.

Sorry, I posted the photo in the wrong topic, Bosch Ksu 40. Please look there, otherwise you don’t want to mess around again.

diodes of average average power. well, where which one is - if you look at the diagram, it doesn’t matter. The principle of operation (described in the book) in short is this - the rotor begins to jerk with a frequency of 50 Hz, and all sorts of rubbish flies off it. I’ve been using it for more than 5 years I haven’t burned anything yet. The result is 40-50%. The whole device, including the start button and control lights, is the size of a pack of cigarettes. Very convenient to take on calls

hi, thank you very much, I assembled the circuit, but I probably installed weak diodes, connected them for 7 seconds, the compressor started working, but the diodes really broke, I’ll try to install more powerful ones. or is that how it should be?

In my practice, jammed compressors have begun to appear more and more often, before I would immediately change them and that’s it, but now I don’t want to do bad work, I heard that you can somehow try to knock the ill-fated compressor out of the wedge.

Yura, I have a transformer wedging unit, but almost always it lies idle (unless, after my work, a wedge comes, so as not to unwind the customer with money again) practice has shown that after wedging, a wedge follows again, and no more , than in a week, more often in a day. It’s just that the wedge is preceded by a root cause, most likely poor lubrication. As a result, you have extra trips, even if for payment, then symbolic, the client is tense, there is no point. so it is not known which job is worse.

and then you throw 3 phases on for 1-2 seconds and voila - hello to the family and children. verified!

But can you be more specific about the three phases, how to do it correctly so as not to catch one between the phases:eek:, and what power of the compressor you can try to wedge it. :confused:

gentlemen, removing compressors from the wedge! have you tried washing used toilet paper and reusing it for its intended purpose? I recommend using this method. stop engaging in child masturbation, otherwise it’s somehow unpleasant to read all this!

You need to try and not write nonsense. According to Danfos there is no return at all. 8-10 years in sight. NORDs also work a lot. Well, horizontal ones are better with a hammer or against a wall. The suspension is rigid. By the way, they don’t give a damn about diodes.

Hello everyone! I believe that before wedging the compressor, you need to find out the reason for the jamming - in 80% of the jamming occurs as a result of poor oil cooling, we all know that the oil and the compressor are cooled by refrigerant vapors, if freon leaks, then superheated freon enters the compressor and no cooling occurs in this compressor In this case, it operates at a critical temperature of up to +100 degrees and above, and a change in the properties of the oil occurs, i.e. the lubricating property of the oil disappears - from here the following occurs: the shaft-connecting rod rotation system, the bearing expands during heating, which leads to jamming when the overheating and current protection is triggered; it is not always possible to return to normal operation due to a change in the material from which the compressor is made; this is once and twice oil after overheating, it does not restore its properties, so no matter how you wedge it, even with an oil change, you will not return the iron to its previous shape. 6% - I attribute this case of jamming to manufacturers - the problem is related to the accuracy of manufacturing parts (I note that the GOST system for tolerances and fits has not been canceled, but there is such an effect as old equipment and Uncle Vanya with a hangover, not only here but also recently abroad) the remaining 14% - operation of equipment in non-compliance with the technical specifications of the manufacturer, i.e. turned on the air conditioner in winter, which led to liquid freon getting into the compressor, resulting in breakdown and jamming, and finally, at low temperatures, the chance of compressor jamming increases to 60% with respect, Amir

at 100C no changes in the metal can occur, since changes in the crystal structure of metals begin to appear at temperatures above 400C. mechanical deformations after the wedge are another matter. at 100c the oil does not lose its properties, but its viscosity decreases and fluidity increases, which naturally worsens the lubrication. In order for oil decomposition (cracking) to occur, higher temperatures are needed. when freon leaks, the pressure at the suction drops, i.e. the boiling point drops. the vapors overheat. their humidity decreases. The compression work in the compressor decreases and the current drops. It seems like everything is not so scary. The heating of the compressor is mainly facilitated by the operation of the engine and its windings, which risk their lives first.

long-term operation on an overheated compressor is a wedge, but not every wedge is an overheated compressor.

Vyuga4, in case of leaks, air cannot enter the system, since the pressure in the circuit is always higher than atmospheric pressure until the last drop of freon has evaporated.

but in general, I’m talking about the same thing, just in different words.

but I didn’t understand what it is: — reverse rotation of the rocker compressor shaft (compressor tipping over)?

Compressor in the refrigerator: device features

You should start with checking; the correct algorithm for checking the motor is an important part of working with refrigerator motors. The surest way is to check the motor using a working relay. If there is none, then you can check by measuring the resistance of the windings.

In order to do this, you need to put the multimeter in the 2 kOhm position and check.

Using the example of this motor that we used, we get 42 Ohms one resistance; 11.7 – second resistance. Thus, we can conclude that the engine should function normally. After this, you should find the resistance table and use it to finally find out whether the main component is serviceable.

We should not forget that it is necessary to find a common point (for us it corresponded to 53.3 Ohms).

Checking the engine with a multimeter. Result: 53 Ohm

Checking the starting and running capacitors

You can check the capacitor using a capacitor capacitance meter; such devices are produced both separately and as part of a multimeter, a universal device that can measure many parameters. Let's consider checking with a multimeter.

• de-energize the air conditioner
• discharge the capacitor by short-circuiting its terminals
• remove one of the terminals (any)
• We set the device to measure the capacitance of capacitors
• We lean the probes against the terminals of the capacitor
• read the capacity value from the screen

Refrigerator relay: device features

The engine start relay is called a start-protection relay for a compressor or refrigerator.

In such cases, the main task of this unit is to disconnect the motor from the network. The connection of this component is done so that an overload (burnout) does not occur: so that the refrigerator winding does not catch fire, so that the socket does not burn out. The voltage is quite high. If you leave the connection directly in working condition for a long time, then the winding is likely to catch fire. That is why it is better to use a relay from a refrigerator with just such a motor, because it is, as a rule, designed for the power consumed by the motor.

Modern components do not provide for clipping, i.e. network protection from burnt-out windings.

How to check the compressor for performance?

In order to determine whether the device is functioning or not, you need to prepare a tool - a multimeter. Before fixing the terminals of the device, you must make sure that the body of the device is not energized, otherwise the technician runs the risk of electric shock.

If everything is normal, then you will need to apply the terminals of the device to the contacts one by one. The device is considered working if “∞” is displayed on the screen. If an incomprehensible set of numbers is displayed, then there are winding faults.

In order to continue testing the equipment, it is necessary to dismantle the compressor. So that you can understand how to do this, let's look at the process in more detail.

Dismantling the compressor: step-by-step instructions

Step one: first you need to disconnect the conductors from the contacts.

Use wire cutters to disconnect the engine pipes.

Step two: now you need to unscrew the fasteners.

How can you start without a relay and why is it needed? Instructions

In order to start jammed motors, we need an ordinary two-core wire capable of carrying 220 volts, with a household plug at one end and two contacts at the other.

One contact should be inserted at the common point, the second - at the point of the working winding. We will need a device capable of closing contacts; most often we use an ordinary screwdriver (the screwdriver will work instead of the start relay). Using a screwdriver, we connect the contacts of the working and starting windings, after which the structure should be plugged into an outlet. After this, the device starts working. If in such cases it does not start, it means either the motor or the 220 V cable is faulty.

It happens that the windings are burnt, or the compressor simply becomes jammed. And then the situation is somewhat different.

Very often, refrigerators are brought to repairmen and services that turn on for only 5-10 seconds (occasionally it works for up to 30 seconds - minutes). In such cases, the diagnostic procedure is as follows: the engine is connected directly. You should definitely monitor the condition of the wiring and check for any heating. In case of excessive heating, the circuit should be opened immediately.

The device is connected directly, after which you should carefully observe how the refrigerator freezes (both in the freezer and refrigerator compartments). From this we can conclude that a simple replacement of the motor is necessary, or something else needs to be done. Most often, compressors do not burn out just like that, they burn out due to something: due to overvoltage (the most positive outcome, because you just need to replace the motor and refill), because of a clogged capillary (requires not only replacement, but also cleaning ; easy to diagnose - a clogged “capillary” occurs when the condenser is overheated).

If the refrigerator freezes well, then you just need to replace the motor; if within an hour there is no cold anywhere (or the freezer, for example, is frozen, but there is no cold in the refrigerator compartment), then the issue is either a leak or a clogged capillary system. Also, motors can burn due to a faulty thermostat (the thermostat does not turn off the refrigerator and the device runs for a very long time). This happens quite often. However, be that as it may, for full diagnostics, it is advisable to connect the motor directly according to the instructions that we posted above.

Refrigerator engine starting circuit without starting relay

To try to start the compressor from a refrigerator without a relay, assemble a simple circuit from a 220 V power cord, onto which you install contact terminals or alligator clips. Determine which of the outputs on the tank body belongs to the working winding and which to the starting winding. This is done by measuring the resistance between the common contact and each of the two remaining ones - the readings in the working circuit should be lower than in the starting circuit (for different models 10-15 and 25-30 ohms, respectively).

Connect the 220 V power supply to the common output contact and the working winding. After this, use a suitable tool (a screwdriver with an insulated handle) to briefly short-circuit the starting winding with the working winding (a careful electrician will use a non-locking button). This way, a working refrigerator motor will start without a relay.

If there is no sound of the compressor running, the motor is jammed. This often happens on older cars due to general wear and tear, lack of oil in the crankcase or broken valve plates of the piston pump.

Some craftsmen try to wedge the electric motor by making a circuit of two powerful diodes connected to its windings, directed in opposite directions. If the cause of the “wedge” is in the rotor bearings and not in the piston bearings, sometimes this is successful. After wedging, the refrigerator is started again without a start relay in order to finally understand what the breakdown was. But if the “wedge” occurs due to lack of oil in the compressor, you can no longer do without professional help, because the cause has not been eliminated.

Source

Device - do it yourself.

#1 R666A

Ball valve lover

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• from: Ukraine, Kharkov

Dear colleagues, let’s post in this topic diagrams of various devices that are one way or another involved in our difficult task, which we can overcome on our own, knowing which side to take a screwdriver and a soldering iron from

From him. doing in the office assembled an inverter analyzer according to

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, kindly provided by user Leningrad from a friendly resource

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. The cost was about $3.5.

#2 lholod

Diagram of a device for breaking a jammed compressor, a “split” in common parlance.

When eliminating a jammed compressor using this device, voltage is applied to the electric motor windings briefly for 3-5 seconds. Then repeat this after 20-30 seconds. The wedging effect occurs as a result of the fact that when current is supplied through the diodes, an alternating torque occurs on the electric motor shaft. The engine rotor begins to vibrate at a frequency of 50 Hz, the vibration is transmitted through the mechanics to the jammed compressor elements and releases them. It is also possible to use one diode instead of two, the wedging effect will be approximately the same. It is connected to the starting winding circuit; the working winding is directly connected to the network, and not through a diode. Wedging compressors using this device is much more effective than simply applying a higher voltage to the electric motor. The effect of this device during compressor wedging can be enhanced if it is connected through a step-up transformer 1: 1.2…1.5. Transformer power – not lower than 50W.

The wedging device can be connected using the connector from the compressor protective device of older models of refrigerators (which do not yet have RKT). Or using small insulated clamps. The diodes used in the wedging device must have a permissible reverse voltage of at least 400V and a permissible forward current of 10A. Such characteristics are possessed, for example, by D246, D247, D232A, KD203A (B, D). In the picture of the wedging device: 1, 2, 3 – clamps placed on the compressor contacts; 4 – compressor.

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#3 olart07

Jamming

A “jammed” refrigerator motor reveals itself relatively quickly. Among the most pronounced signs is the intense hum of the component, which is replaced by complete silence after a click. The mechanism turns off due to overheating, or rather due to the activation of the automatic thermal protection of the compressor. Many experts recommend replacing an unsuitable element, but there is another possible solution - wedging. It is carried out using a special device consisting of 2 diodes. The “blade” applies voltage for 5 seconds, then the manipulation is repeated at intervals of half a minute. A torque appears in the electric motor, which provokes vibration of the rotor. Due to this, wedging of the motor occurs. This method is quite effective and often eliminates the need to replace refrigerator components.

Refrigerator compressor malfunctions

The energy unit in the refrigerator is the inextricable unit of the electric motor and compressor. The purpose of the device is to create directional movement of a two-unit refrigerant in the gas phase. The compressed gas is fed into the condenser, turning into liquid and releasing heat to the environment. Freon flows through the tubes to the evaporators. The liquid boils, taking heat from the chambers. If there is a loss of performance or failure of the motor-compressor, the refrigerator does not perform its functions. The reasons for the refrigerator malfunction due to a compressor failure are determined by a specialist.

Refrigerator operation diagram

The refrigeration unit includes several elements:

1. Compressor. There are two types of motors: inverter and linear. After turning on the refrigerator, it is this element that circulates the refrigerant through the system, cooling the internal chambers of the unit.
2. Capacitor. It looks like tubes that are located on the back wall of the refrigerator. Thanks to this element, the refrigerator does not overheat.
3. Evaporator. In this system, freon, a refrigerant, changes from a liquid to a gaseous state.
4. Thermostat valve. It is required to maintain pressure at a given level.
5. Refrigerant. In modern installations, only two types of liquid are used - freon or isobutane. As the refrigerant circulates through the system, it cools the space inside the equipment’s chambers.

The entire cooling system is a vicious circle. When the refrigerator is turned on, the compressor pumps out the refrigerant from the evaporator and sends it under high pressure to the condenser. Once the gas enters the tubes, it turns back into a liquid state and flows into the evaporator.

Such a system must operate almost continuously. Every time the temperature in the chambers drops below the normal level, a signal from the temperature sensor is sent to the compressor, and the motor starts working until the indicators return to normal.

Types of compressors in refrigerators

Most often, piston-based compressors with bypass valves are used in everyday life, drawing in gas during discharge through one valve and pushing it out after compression through another. A conventional compressor, with a crank converting the rotation of the motor shaft into piston movement, is called a manifold compressor. Such units are installed on budget models. They are noisy and get very hot due to the large number of moving parts in the compressor.

Linear compressors have a compression chamber with a piston. The crankshaft is excluded from the system. The piston operates directly from the solenoid, converting alternating current into mechanical energy of the piston movement. Models in the mid-price segment are equipped with linear motors. The energy efficiency of compressors is higher; they belong to class A. Starting and stopping equipment according to the instructions of the thermostat is less noisy.

Inverter compressors are equipment for continuous operation with variable capacity to maintain the mode in the chambers. Quiet operation, high efficiency, and reliability of the entire system are a consequence of installing an electronic converter in a brushless motor. The incoming current with a frequency of 50 Hz is rectified and converted into alternating current of the desired frequency. This provides variable rotation speed. High cost and dependence on stable parameters on the power line are obstacles to introducing new products into all models.

All motor-compressors have a complex structure, hermetically pressed into the housing. Internal failures lead to replacement of the entire assembly. External components include a starting and temperature relay, frame mounting, and gaskets.

When and why is such a connection needed?

The refrigeration compressor is a piston machine driven by an AC commutator electric motor. The drive and discharge mechanism are mounted on a frame inside a metal closed housing. The casing is attached to the refrigerator body with bolts through supports with rubber damping inserts. A special starting relay is installed on the housing, into which the winding contacts are routed. The relay works in conjunction with the thermostat to maintain the set temperature in the freezer compartment of the refrigeration unit.

Signs of a faulty refrigerator compressor

The purpose of the compressor is to provide temperature conditions in the chambers within the design range. The following signs should alert the user:

• Strong noise, uncharacteristic, newly appeared sounds, in the form of creaking, knocking, at the moment of starting and stopping the unit. Possible vibration and grinding noise.
• The motor is overheated, it is impossible to hold your hand on it for 3-4 seconds.
• A puddle of oily consistency appears under the refrigerator.
• There is a hum from the motor, but there are no signs of pumping, the condenser grill is cold.

Signs of compressor failure

If we talk about the signs of a compressor failure, they will be as follows:

• strong noises during operation and knocking, grinding and strong vibrations, as well as during start-up;
• the motor will overheat, and oily puddles will appear under the unit itself;
• strong engine noise when the compressor is running.

These signals should alert the owner of the refrigerator, and after this the unit itself must be immediately disconnected from the power supply, and then call a technician. Such a decision will be correct than trying to fix the breakdown on your own, without having certain knowledge, equipment, and parts.

Conclusion

Considering that the most expensive repair is considered to be replacing the compressor, it is necessary to carry out timely repairs and maintenance of the refrigerator. Regardless of which block there is a breakdown, if it forces the energy unit to work under heavy load, it will fail.

It is important to organize the operation of the unit with power supply through a voltage stabilizer. Equipment failure due to network fluctuations is not covered under warranty. All electronically controlled refrigerators are at risk using a direct network connection.

We suggest watching a video of how the compressor start-up relay works, what it consists of and how it is repaired.

Conclusions and useful video on the topic

Video #1. Overview of the principle of operation, types and main faults of the start-up relay:

Video #2. Signs of failure of the common RKT starting relay. Connecting an external capacitor to compensate for unstable voltage:

Video #3. Engine and relay ringing. Coil repair:

The simple design of the starting relay allows you to independently find faults and easily fix them. This does not require deep electrical knowledge or special tools. .

However, punctuality must be observed, since the functionality of expensive equipment depends on the quality of the work performed.

Would you like to talk about how you selected a starting relay to restore the functionality of the refrigeration unit? Do you have useful information on the topic of the article that is worth sharing with site visitors? Please write comments in the block below, post photos, and ask questions.

An electrically driven compressor installed in refrigeration machines circulates the refrigerant and maintains the required temperature in the freezers. If performance decreases or problems occur with starting the motor, you should check the condition of the circuits, and then start the refrigerator compressor without a relay, which will make sure that the unit is working properly.

Where is the compressor located in the refrigerator?

This unit is located at the rear of the device in its lower part. The compressor refers to the main part through which the refrigerant circulates in the thermal system. Depending on the purpose, two units can be installed in the refrigerator. The compressor is driven by a motor. Modern improved models of devices are equipped with piston compressors, with an engine installed inside them.

Piston devices are less likely to break down because they eliminate the loss of refrigerant.

Refrigerator compressor connection diagram

A specialist and a user who services his device himself should know it. This will help determine the suitability of the motor for operation. However, only a master can determine the reason for the breakdown.

Pinout

There are 3 pins on the motor housing, the pinout of which is indicated by letters:

• C – general output;
• S – starting winding terminal;
• M or R – working winding terminal.

The tester must be connected to the terminals one by one. First, the resistance of the starting and operating windings is measured. The resulting values ​​are added up and then compared with the resistance between the two windings. It is measured with a tester . If the compressor is working properly, then these values ​​will be the same. Slight deviation is allowed.

Causes of compressor failure

If we talk about the reasons why a refrigerator compressor may jam, our specialists can talk about the following.

• Winding break. The break can be either on the operating circuit or on the starting mechanism, or on both at once - the motor will not start, and plugs will be knocked out on the electrical panel.
• Short circuit between the turns of the working type of the electric motor winding. The compressor will start up when the turns in the winding are closed, and the resistance of the winding itself will be reduced through the start-up relay. The relay will operate within a minute, make characteristic clicks and then turn off. After this, the relay will try to start again.
• The motor in the refrigerator jams - when turned on, the unit hums and makes a lot of noise, but the electric motor really does not rotate, the compressor does not provide the required level of pressure. And the resistance in a pair of windings corresponds to its nominal value.
• Often, broken/deformed compressor valves can also cause compressor wedge.

How to connect a compressor from a refrigerator without a relay directly

First of all, the general output is called. Then a terminal is attached to it, the second is connected to the working winding. It is important to use the resistance indicator to determine which one is working. The value should be low, high indicates the starting winding.

You need to know how to connect a compressor from a refrigerator without a relay, otherwise the unit will overheat and fail . You should check the penetration of the housing, otherwise you can feel an electric shock when you touch it with your hand. To check the winding, the left terminal is connected to the output winding, the right terminal is connected to the other side of the housing. Other terminals are also checked. If they are in good working order and do not break through, then the device can be used. This working compressor is reliable and safe. If you do not have sufficient skills and knowledge, it is better to contact a service center, since specialists know exactly how to connect a refrigerator without a relay directly.

Incorrect actions will lead to serious damage.

Diagnosis of compressor breakdowns

The user himself can diagnose the breakdown and wedge of the compressor and all based on secondary signs in the operation of the refrigerator.

The compressor does not work properly or does not turn on at all when the start relay is heard clicking, which initiates the start.

The compressor may work, but it is true that no cold is produced - this is an indication of the absence or shortage of refrigerant in the system. Or it may indicate complete wear in the compressor system, which does not create the proper level of pressure in the unit. In this case, the unit operates without stopping.

The refrigerator may either insufficiently or excessively cool the chambers - this is an indication of a breakdown of the valve, as well as the temperature sensor, or, less often, the relay responsible for starting it. For some refrigerator models, the malfunction itself can be localized in the electronic control unit.

Freezing of snow and ice on the walls is quite possible if the refrigerator’s operating cycle is disrupted, or if there is high freon pressure in the system. This will cause the compressor to malfunction.

How to connect a compressor to a refrigerator with a condenser

The procedure for connecting a device compressor with a capacitor begins with connecting the motor to the electrical network using terminal blocks. First, contact is made with the common wire, and then with the working wire. Electricity is supplied to the starting output through a short contact of a bare wire.

The procedure should be carried out with caution to avoid electric shock. After connecting to the network, a hum will be heard from the blower. The motor will start blowing air when it comes into contact with the start output. So it should work for no more than 15 minutes. The case can heat up to 50°. Overheating must not be allowed. The electric motor should start. If this fails, you need to check the components in the power circuit.

Checking the compressor for serviceability: features of the process

If you do not know for sure whether the compressor is working or not, then after it is removed, you need to check its performance. Only after this will it be possible to use it for other purposes. The first thing you need to do is connect the part to the electrical network.

Signs of compressor operation are as follows. A hissing sound will be heard. It indicates that a process is taking place consisting of air being sucked into one tube and exited through another.

It is important to keep the oil in it intact and undamaged when dismantling the compressor. To do this, the cable that comes from the temperature sensor is cut. After this, the resistance indicators are measured and the location of the contacts that are closed is determined. All this will be required further. They are suitable for use. It is also worth saving the electrical circuit of household appliances. An example of it is shown in the photo below.

Checking the functionality of the connected compressor, starting the engine

The serviceability of the compressor is determined with a multimeter. But before doing this, you need to make sure that the engine housing does not break through. If everything is normal, then the multimeter probes are applied to each contact one by one . If numbers appear on the screen, it means that the winding is faulty; the operability of the compressor can be judged when the “∞” sign is displayed.

To continue checking, remove the casing from the compressor. The wiring is disconnected from the contacts. They bite through the electric motor tubes that connect it and other mechanisms. Tighten the mounting bolts and remove the compressor from the casing. Then they unscrew the screws and measure the resistance between the contacts. To do this, apply tester probes to the output contacts. A resistance of 25 to 35 ohms is considered normal. This depends on the model of the refrigerator and the electric motor. If the reading is lower or higher, the compressor must be replaced. Then check the performance with a pressure gauge .

A hose with an outlet is connected to the discharge fitting, the engine is started and the pressure in the compressor is measured. If it is working properly, the pressure gauge will show 6 atm. The device should be turned off immediately, because the pressure will quickly increase and the mechanism may break. In a compressor that is unsuitable for operation, the pressure gauge will show no higher than 4 atm . It will have to be removed and a new one installed. In order to replace a failed compressor, certain skills are required, as this process is quite complex. It is best to entrust this work to a professional.

If the pressure is normal and the device does not turn on, there may be a problem with the start relay. It may happen that after connecting the motor from the refrigerator, it does not turn on. Most often the reason is jamming. You can fix it yourself using a special device with two diodes. It is connected to the motor windings and voltage is applied for a few seconds. Then after half a minute the procedure is repeated. Thanks to wedging, the motor can be rocked.

Not in all cases, it is possible to determine the cause of a refrigerator malfunction by testing the electrical circuits of the compressor. To start the electric motor when using inverter devices, you will need an electronic unit installed inside the device. If you try to force such a motor to start, a short circuit may occur, and then it will completely fail. In these cases, it is more correct to seek help from specialized service centers , where experienced professionals work and have the appropriate equipment.

Replacing the motor-compressor (engine) of the refrigerator

Promotion until July 20, 2021!!! Discount on replacing a refrigerator motor-compressor (engine) is 10% of the repair cost. Phone number to order repairs:

8

The motor-compressor is the “heart” of any refrigerator. To our deepest regret, the motor-compressor often fails. The cause of the breakdown may be:

Also, the motor-compressor fails due to its long service life.

A faulty motor-compressor cannot be repaired; it must be replaced with a new one. The repair is considered difficult.

The technician who diagnosed the failure of the motor-compressor selects an original or similar motor-compressor based on technical characteristics, depending on the wishes and capabilities of the customer. I must warn you that the customer’s idea that replacing a compressor takes 30 minutes (unscrewed and screwed on) is not justified. The repair of replacing a compressor is not easy. In fact, it looks like this.

Replacing the motor-compressor in a Samsung RL55 refrigerator

my repair (replacement) of a failed motor-compressor in a Samsung RL55 refrigerator. Regarding the possible cause of the malfunction of your refrigerator, as well as the estimated cost of parts and labor, I can advise you by phone.

Removing the old motor-compressor in the refrigerator

1. Turn off the power supply to the motor-compressor.
2. We remove freon from the system (and this is not easy - cutting off the tube; in some cases, the system must be evacuated).
3. It is necessary to unsolder all the tubes suitable for the motor-compressor, and also unsolder the filter-drier.
4. Dismantle the faulty motor-compressor by removing it from its mounts. Sometimes you have to hang the refrigerator to perform this operation.

Installing a new motor-compressor in a refrigerator

After all the above points, you can finally mount a new motor-compressor, installing it in its regular place.

1. It is necessary to solder the discharge tube.
2. Solder the filling valve.
3. We solder the filter drier (a small part, but it plays a very important role in the operation of any refrigerator. It prevents moisture and small particles from entering the capillary tube, which can cause clogging of the capillary tube). The cost of a filter drier is small, but the consequences if it is not replaced can be disastrous, including failure of the new motor-compressor;
4. Soldering the suction tube.
5. Soldering the capillary tube.
6. Connecting the power supply to the new motor-compressor.
7. Pressure testing of the system.
8. Evacuation of the system (removing moisture and air from the system).
9. Refilling the refrigerator with refrigerant (freon).

Only after all the above steps the refrigerator is ready for use.

After this operation, the refrigerator will return to normal operation within 24 hours.

The cost of replacing a motor-compressor, depending on the brand of the compressor, is from 1,450 rubles.

Replacing the motor-compressor in the refrigerator. Cost of work

*** only the cost of a technician’s work to replace a motor-compressor is indicated, without taking into account the cost of a new compressor and related parts.

!!! You can get my FREE consultation about a possible*** malfunction of your refrigerator by calling:

+7

*** - not all faults can be diagnosed over the phone. The most accurate diagnosis is possible only by inspecting the equipment.

Source: https://holodilkin.ru/articles/zamena-motor-kompressora-holodilnika/

Connection diagrams for a magnetic starter with a 220 V coil

The source of the fur coat is the condensate on the catcher that has not had time to drain, and then the process proceeds progressively until the entire chamber is covered with frost. Having measured the resistance, we look at where the lowest value is - this will be the working winding. Underneath there are two bolts of slightly different sizes.

Suddenly the PC is faulty and the starting winding is constantly powered, the protective relay is switched on: its winding is heated by the current of the starting winding, the bimetallic plate bends and opens the general power circuit.

But regarding seals, general recommendations can be given. About the working capacitor The compressor of a No Frost refrigerator requires even more excess power than a crying refrigerator.

If necessary, we also connect a relief and safety valve to the flanges. Connect the electric motor control circuit to the pressure switch contacts.

Now let's move directly to the connection diagram for the refrigerator compressor. How to connect a compressor from a refrigerator without a start relay

Description of the starting relay device

Without a relay, an old refrigerator is started when there are doubts about the operation of its automation. A start-up protection relay usually combines two important functions in one device: ensuring the start of the compressor electric motor and its safety during overloads.

The engine has two stator windings: working and starting. Power is constantly supplied to the working one, and the starting one is powered by a short-term pulse at the moment when you need to turn on the motor. The start signal is supplied from the freezer temperature regulator circuit. It is possible to start a compressor from a refrigerator without a start relay only by interfering with its operating circuit.

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Place the door on a soft surface with the inner panel facing up.

How is the compressor connected?

Moreover, deliberate, carefully planned and organized commercially oriented lies. Well, there is nothing else left. Safety is also an important point. Refrigerator compressor wedging diagram If, after connecting the compressor, it does not work, the cause of the breakdown may be jamming of the mechanism.

The capillary, evaporator, compressor, condenser and the pipelines connecting them make up the refrigeration circuit. Helpful information. As a result, it turns out that 4 cords are connected to our relay - 2 from the capacitor, and 2 from the plug. The refrigerator should work. Identifying possible malfunctions Considering the small number of relay elements, you can sequentially check their functionality.

The connection of the compressor pipes with the filling, discharge and suction lines should be 6 cm, and the diameter should be 6 mm. Therefore, there is no legal import of absorption refrigerators running on flammable gases in the Russian Federation and many other countries. Causes of malfunction The main causes of compressor malfunction are: A decrease or increase in voltage in the electrical network; Power surges; Overheating of parts of the refrigerator due to the close proximity of heating appliances; Independent replacement of faulty parts or their repair; Damage to the housing or condenser when moving the refrigerator. The electrical circuit of the Atlant refrigeration unit is designed in such a way as to prevent the rapid failure of the elements that are included in it. How to connect a compressor from a refrigerator

Troubleshooting

Given the small number of relay elements, you can sequentially test them for functionality. To do this you will need a flathead screwdriver and a multimeter.

No. 1 - problems with relay operation

From a design point of view, a relay with a coil is a device with normally open contacts, and a posistor version is a device with normally closed contacts. Although in both cases there are possible options when, at start, there will be no current supply to the starting winding or, conversely, its shutdown will not work.

If the compressor is operational, but does not turn on following a command sent from the refrigerator control unit, this indicates a lack of voltage on the stator starting winding.

The reason for this may be:

• electrical circuit break;
• contact strip problem;
• posistor overheating;
• the electrical protection system is triggered and does not return to its normal position.

If the refrigerator turns on for 5-20 seconds and then turns off, then most often this is a consequence of the relay’s protective mechanism triggering.

The reasons may be the following:

• the protective mechanism is working properly, but the operation occurs due to problems in the working winding of the motor;
• the protective mechanism is working, but the relay does not open the contacts in the starting winding circuit;
• The protective mechanism is faulty, false operation occurs when the temperature is slightly overheated.

Since there may be several reasons for the malfunction, it is necessary to carry out a complete diagnosis of the start-up protection relay of the refrigerator.

No. 2 - faulty electrical circuit contacts

A faulty start-up relay can be detected using a multimeter.

To do this, you need to ring three sections of the electrical circuit:

1. If there is a break in the area from the input to the output to the working winding, then it is necessary to check the location of the contact opening with the protective mechanism. It is possible that it worked and did not return to its original state or that the opening contacts were oxidized.
2. If there is no contact in the area from the input to the output to the starting winding, then in addition to a banal break in the conductor, two options are possible: opening the circuit by a protective mechanism or lack of contact through the bar.
3. A break in the straight (zero) section means mechanical damage to the chain - it is the easiest to find and fix.

If the relay operation is based on the use of an induction coil, then it is necessary to forcibly raise the bar - otherwise there will be no contact.

No. 3 - incorrect operation of the posistor

To make sure that the posistor is working properly, you need to check it in a cold and heated state.

First of all, you need to wait until the posistor has cooled down (2-3 minutes in a non-working state is enough) and ring it with a multimeter. If there is no current or a high resistance is detected, the posistor is faulty and needs to be replaced.

To check the disconnection ability, you need to connect a consumer of electricity, for example, a hundred-watt incandescent lamp, to the posistor. To do this, you need an electrical plug with two terminals that are connected to the input of the device. The wires from the lamp are connected to the connectors leading to zero and the starting winding.

When the plug is plugged into the socket, the light will light up. Since the rating of the passing current in the experiment is significantly less than when starting the compressor, the posistor will heat up for a long time - for a hundred-watt lamp the response time will be 20-40 seconds.

If the light goes out after a while, then the device is working properly. If the consumer is not de-energized, this means that the posistor is not working. Repairing it at home is impossible, it is inexpensive, so you need to purchase an element with similar parameters.

No. 4 - problems with the contact strip

There are two types of contact strip problems:

• no current passes when the contacts are closed;
• The bar sticks and won't go down.

The first problem may arise due to oxidation of contacts. In this case, you need to clean them with sandpaper. Also, the reason may be the curvature of the position of the bar, then it is necessary to install it horizontally.

A more difficult problem is the junction of the bar and the pin, which is affected by the magnetic field of the solenoid. The solution to the problem here is individual and depends on the type of malfunction.

Air compressor made from refrigerator and fire extinguisher parts

The figure shows the connection diagram for this device in the Orsk refrigerator. Therefore, it is necessary to find documentation or disassemble the refrigerator compressor to understand the location of the feed-through contacts.

Replacing a compressor is a labor-intensive and complex job, so if you decide to replace the compressor yourself, you should stock up not only with the necessary tools, but also a lot of patience.

If the relay does not have a seat, then when connecting to the compressor you must not make a mistake with the order of connecting the contacts.

Thanks to this, you can connect additional parts to the compressor, for example, a pressure gauge or a safety valve. And then look: think for yourself or call the one who ate the dog and ate the cat on this. Helpful information.

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Everything is fine, but the compressor is too noisy and the housing vibrates. If there is excessive pressure, the air supply should be stopped to prevent the container from bursting.

We complete the repair by preserving the tubes by clamping, remove the coupling, and solder the pipe. The boiling point of water is really degrees. Under the action of a compensating spring or gravity, the core returns to its original position and the contact opens. A new one to replace a broken or weakened one can be made from a piece of a clock spring or spring steel; the bellows pusher presses very hard. Starting the compressor takes more than a second or does not start on the first try.

Safety precautions: the most important element of repair

Self-repair is possible in some cases, but does not require any special qualifications. But tell the truth, 10 bucks for a kick is not too much? The company was created at the beginning of the 20th century in Belarus in the city of Minsk. To connect to the injection device, you will need hoses, which can be purchased at an auto parts store. Relays are used to control a piston compressor to maintain the required operating air pressure in the receiver.

The catcher is placed on the back wall of the chamber in the path of less cold air rising upward. This is due to the need to absorb thermal waves. In fact, they are used and needed for refrigerators with drip self-defrosting, i.e. Install the lid, two rear stops. Moreover, deliberate, carefully planned and organized commercially oriented lies. How does a refrigerator compressor work?

Replacement and selection of starting/running capacitor

If you have an original capacitor, then it is clear that you simply need to put it in place of the old one and that’s it. Polarity does not matter, that is, the terminals of the capacitor do not have the designations plus “+” and minus “-” and they can be connected in any way.

It is strictly forbidden to use electrolytic capacitors (you can recognize them by their smaller sizes, with the same capacity, and the plus and minus markings on the case). As a consequence of use - thermal destruction. For these purposes, manufacturers specially produce non-polar capacitors for operation in an alternating current circuit, which have convenient mounting and flat terminals for quick installation.

If the required value is not available, then it can be obtained by connecting capacitors in parallel . The total capacitance will be equal to the sum of the two capacitors:

That is, if we connect two 35 μF capacitors, we get a total capacity of 70 μF, the voltage at which they can operate will correspond to their rated voltage.

Such a replacement is absolutely equivalent to one capacitor of larger capacity.

If the wires are mixed up during replacement, you can see the correct connection using the diagram on the case or here: Connection diagram for the capacitor to the compressor

Types of capacitors

To start powerful compressor engines, oil-filled non-polar capacitors are used.

The housing is filled with oil inside for good heat transfer to the surface of the housing. The body is usually metal or aluminum.

The most affordable capacitors of this type are CBB65 .

To start less powerful loads, such as fan motors, dry capacitors are used, the housing of which is usually plastic.

The most common capacitors of this type are CBB60 , CBB61 .

The terminals are double or quadruple for ease of connection.

A refrigerator compressor wiring diagram is required when equipment malfunctions of this type occur. It will be difficult for any modern person to do without such a unit as a refrigerator, and therefore it will be necessary to repair equipment promptly. However, before proceeding with repairs, it is necessary to study the general electrical equipment of the refrigerator. Today we will talk about this in more detail.

Refrigerator operation diagram