In detail: do-it-yourself refrigerator repair yuryuzan 207 from a real master for the site my.housecope.com.
Refrigerator YURYUZAN-207 KShD-220/40 two-chamber, made in the form of a metal floor cabinet with refrigerating and low-temperature chambers, closed by separate doors. The inner chamber is steel enameled. Refrigerator door openings are sealed elastic double-cylinder seal with magnetic insert.
Rice. one.Refrigerator "Yuryuzan-207" KShD-220/40 (melt water drainage scheme)
The refrigerator contains a number of comfort elements that facilitate its maintenance during operation: automatic defrosting of the refrigerating chamber evaporator in a cycle and defrosting water out of the chamber; restriction of door opening at an angle of 90 ° with the possibility of adjustment at an angle of 120 °; the possibility of rearranging the shelves in the refrigerating chamber with an interval of no more than 50 mm in height and re-hanging the doors for right-hand or left-hand opening. The compression refrigeration unit operates on refrigerant R12.
The low-temperature compartment is located at the top of the refrigerator. The melt water formed during defrosting of the low-temperature chamber is discharged through a hatch in the partition, which is closed with a special stopper (Fig. 1).
The defrosting of the evaporator of the low-temperature chamber is manual, carried out during the defrosting period. The high humidity is constantly maintained in the refrigerating chamber, which makes it possible to reduce the shrinkage of unpackaged products. This is achieved by cooling the refrigerating chamber with a crying type evaporator, which defrosts during the non-working part of each cycle. Moisture from the evaporator flows into a tray located under the evaporator, and through the drain device enters the defrost water tank and the evaporator.
Video (click to play).
Rice. 2Electric circuit of the refrigerator "Yuryuzan-207" KShD-220/40
Refrigerators "YURYUZAN 207" are two-compartment refrigerators with a classic arrangement of chambers, i.e. the freezer is located on top. The advantages of this model are low cost and high reliability. Repair of the YURYUZAN 207 refrigerator usually only required as a result of physical wear and tear on a part.
It is clear that since the refrigerator belongs to the economy class, it makes no sense to carry out expensive repairs. However, most often, the thermostat of the YURYUZAN 207 refrigerators breaks down or the core in the starting relay breaks, and these repairs are inexpensive. The parts needed for the refurbishment are also affordable.
Simple repair of the refrigerator "YURYUZAN" it is quite possible to do it yourself. This includes, for example, overweight of doors, replacement of a seal, replacement of a light bulb in a refrigerating chamber.
Yuryuzan refrigerators were produced in the Soviet Union and in Russia until 1996 in the Chelyabinsk region in the city of Yuryuzan. These refrigerators did not have a quiet compressor or a beautiful appearance, but many of them still work today.
Some features of the refrigerator's operation can be taken as a sign of breakdown: the sound of a moving liquid during operation, increased noises during switching on, a layer of frost on the walls of the refrigerator with a drip defrosting system. In fact, all these are features inherent in a working refrigerator.
Signs of a malfunctioning refrigerator include:
To identify a malfunctioning refrigeration appliance, look at the cumulative symptoms:
Elements of the working system of Yuryuzan refrigerators break down for various reasons. Not always the cause of the breakdown is in worn out or defective components. Refrigeration units often break down if not properly operated.
The operating rules are described in the user manual for the refrigerator. These include the correct installation of the device (no closer than 5 cm to the wall and other furniture, away from heating appliances); periodic cleaning of the condenser grid and drainage drain. At the same time, it is not recommended to manually clean the walls of the chambers from ice using sharp objects. If the voltage in the room often jumps, it is useful to install a stabilizer.
Household appliances in a varied assortment fill the life of every modern person. There are devices that you can easily do without, although they make our life easier, and there are those devices without which life is impossible. As you know, all equipment tends to break down, but the greatest grief comes at the moment when a very necessary equipment breaks down, the repair of which is often very expensive, and the acquisition of a new one is even more. We are talking about a refrigerator - a device that is in every home, and the breakdown of which will upset any owner.
Few people know that you can repair a refrigerator without contacting a service center. During the time that refrigerators live in our house, many craftsmen have accumulated successful experience in eliminating the most common problems that arise during operation. The main advantage of modern equipment that generates cold is its device, which even an inexperienced craftsman can figure out with his own hands.
Cold formation
Naturally, before proceeding with the repair, you need to understand how a household appliance works. The most important thing in the refrigerator is the unit that produces the cold. The production of cold in the chamber is carried out due to the main three components, which are connected to each other by a piping system: an evaporator, a compressor and a condenser. Refrigeration gas is located inside the closed system. Previously, Freon-12 was used for these purposes. However, in modern household appliances, as cooling, it is customary to use safer substances that contribute to the production of cold.
The cooling of the walls of the refrigerator takes place thanks to the compressor, which, with the help of an electric motor, pumps out the cooling gas, and with the help of the condenser, the gas is injected. The radiator system cools the gas and converts it to a liquid state and then returns to the evaporator. As a consequence, the continuous cycle allows for constant evaporation.
Cooling cycle
In order to reduce energy consumption, as well as increase the service life of the device, reduce wear on the mechanical parts of the refrigeration unit, the device is equipped with a large and massive door, which performs the protective (insulating) function of the refrigerator chamber from external influences. The compressor motor does not run constantly due to a special system that controls the switching on and off of the refrigerator, allowing it to maintain the desired temperature in it.
The temperature control inside the household appliance is carried out by means of a temperature relay, which operates in the correct mode, constantly monitoring the switching on and off of the compressor. This happens when the temperature inside the refrigerator drops or rises above the set parameters. Automatic mechanisms are designed to create a continuous cycle of work.
At the moment when the refrigerator generates cold, the compressor motor runs at rated power, an electric current flows through the main network, supplied from the mains through a temperature relay, through closed contacts. At the same time, the relay activating the defrosting function is in the position of closed contacts. As a result of this, a closed working circuit is formed. The electricity consumed by a working refrigerator is equal to the rated power, which can be found in the instructions or technical passport.
When the temperature inside the refrigerator drops, a signal is sent to the relay, and the contacts open, and the compressor motor is turned off. Accordingly, an increase in temperature entails closing the contacts and turning on the compressor.
Then the following happens: when the compressor motor starts, and the refrigerator motor does not rotate, a starting start occurs, at the moment of which the consumed amount of electricity increases several times. The triggering mechanism of the relay responds to such changes, as a result of which the contacts are closed. When the contacts are closed, the starting winding of the motor is connected to the electricity network, and after the motor starts rotating, the power consumption is reduced from the starting power to the rated power. It is worth noting that starting the engine in the refrigerator, which is in good working order, takes place in a matter of seconds.
In turn, if a household appliance breaks down and it is impossible to start the engine the first time, the bimetallic plate heats up. The process takes about 15 seconds, after which the plate opens and breaks the circuit. The subsequent flow of current will be only after the plate has completely cooled down and another attempt to start the engine will follow. If this fails, the circuit will open again.
Thus, the refrigerator automatics starts working at the moment of start-up.
Diagnostics and troubleshooting of the refrigerator
After a detailed study of the principle of operation of the refrigerator, you can begin to identify malfunctions, as well as search for methods to eliminate them. It is necessary to clearly understand what kind of breakdown occurred, as well as soberly assess the chances of fixing it with your own hands.
In fact, all breakdowns that occur in refrigerators can be divided into two parts:
cooling of the interior of the refrigerator is not performed while the engine starts normally. In such a situation, the cause of the breakdown should be sought in the main components of the unit;
the refrigerator does not turn on, or it turns on for a short time, after which it turns off. With such a breakdown, the reason lies in a malfunction of the electrical circuit of the household appliance.
The master's case is afraid:
exactly so, the help of specialists in the repair of refrigerators is necessary in the first case, due to the fact that it will not be possible to fix the malfunction at home. It is possible that refrigerant gas has leaked in the refrigerator as a result of loss of tightness. In addition, it may be necessary to completely replace the main operating systems.
Household chores:
if your device has broken any electrical mechanism, most likely, the malfunction can be eliminated without the help of specialists. Naturally, the first step is to diagnose the breakdown and determine whether it is possible to fix it without replacing the main part.
Tools and diagnostics
So, having determined that the breakdown belongs to the second group, you need to arm yourself with tools: a universal tester and a screwdriver, a meager set, but quite effective. The first thing to do is to determine the quality of the voltage in the network. With high quality, its indicators will be equal to 220 Volts, anything lower may lead to a failure in the operation of the device.
Then it is necessary to carefully inspect the cord and power plug, thanks to which the necessary contact is ensured. They should not be damaged, broken, sparked or heated.
After that, you need to check the compressor terminals, they must also be in the proper form. Here you should check the voltage, and if its quality is good, unplug the refrigerator from the outlet. Further, all manipulations occur only in the disabled state.
It is also necessary to inspect the compressor itself. It is located at the bottom of the back of the household appliance. The compressor should not be damaged in any way, if any, it will be possible to determine the location of the breakdown.
After visual inspection, you should proceed to checking the integrity of the windings, in the same area there is a relay responsible for starting the refrigerator. Before inspection, you need to disconnect the flexible wires. Typically, the terminals are labeled accordingly to indicate their purpose.
To check the winding circuit for continuity, you need to put the tester in ohmmeter mode, then fix the free wire to the tester, and check the rest of the leads with the other end of the tester. In addition, diagnostics should also be performed in pairs. If the tester does not show any movements (deviations of the arrow), there is a possibility of damage to the circuit winding or a short circuit. If this is confirmed, you need to change the compressor motor.
It is also necessary to check the control circuits. This can be done by short-circuiting the two wires disconnected from the relay and checking the contact between the wires and the switching plug. If contact is found, it means that the cord, defrost and temperature sensor are in good working order. In the absence of contact, each unit is checked separately in order to identify malfunctions.
If there are kinks on the cord or near the plug, then they must be carefully examined, as practice shows, often there is a breakdown in these places.
Inspection of small parts
Quite often, the cause of a breakdown lies in small details, as a result of a malfunction of which, the integral operation of the system of the entire unit is disrupted.
To check this part, as well as the defrost controller, you must first remove them and disconnect the wiring. This can be done with a screwdriver. Using a tester, check each wire, if there is a short circuit, the sensor is faulty and needs to be replaced.
If the defrost function does not work, you can simply install a jumper. It is done with a metal bug. The only thing worth noting is that this method is only suitable for older models of refrigerators. Otherwise, if freezing is not controlled, a more serious failure may occur. This is due to the fact that the device will operate without shutdown control; this will need to be done manually. When installing a bug, you must do everything possible to fix the problem and remove it as quickly as possible.
The temperature sensor must be replaced in the event of a breakdown.
Replacing the refrigerator thermostat
Self repair
If, during full diagnostics, it was determined that the circuit is working normally and does not have openings, the start and protection relays should be checked. This can be done by removing the cover. It can be removed only if you drill out aluminum rivets, after which the cover is fastened using special screws and nuts.
On old-style refrigerators, such a lid is fastened with latches, which are pushed back with a screwdriver and the lid is removed.
The biggest problem of the relay is the burning of the contacts of the pair, it can also jam the core in the coil, the stem breaks and the spring wedges. The first thing to do to fix the breakdown is to first get the coil out, it is fastened with latches. After that, it is necessary to remove the core and contacts with the rod from the coil. The next step is to clean the parts from dirt and dust. Alcohol and a soft cloth can be used. If necessary, the core is cleaned with sandpaper or a file to ensure free play in the coil channel. All contacts are also subject to cleaning.
Quite often, a stem breakage is a consequence of a breakdown of the start and protection relay. You can replace the factory stock (plastic) with a homemade stock. It is made from a 5x35 mm nail, and a metal part will last longer than a plastic one.
After installing the stem, the start and protection relay is assembled in the reverse order of disassembly, installed in place, and the contacts are connected.
When contacts are oxidized, cleaned and quickly burned, you should use the services of specialists.
As you can see, repairing a refrigerator, in case of breakdowns of the second group, often does not require the help of a specialist. It is enough just to understand the circuit of your household appliance and assess your abilities. If you feel that you cannot repair even an elementary breakdown, it is recommended that you take your household appliance to a service center or call a specialist at home. You can follow its actions and subsequent breakdowns of this type, if any, fix it yourself.
In any case, each self-repair should be deliberate, you may damage the refrigerator more than fix it, and you will have to buy a new one, which will entail large financial costs.