Sudden failure of the refrigerator Atlant often becomes an unpleasant surprise, especially when there are perishable foods inside. In most cases, the reason the compressor stops or fails to start is the failure of the start-up relay. This small but critical element is responsible for supplying voltage to the motor windings and protecting it from overloads. Understanding how to correctly connect a relay to a refrigerator Atlantallows you to save a significant amount on calling a technician and quickly bring the equipment back to life.
Before starting repairs, you need to make sure that the problem lies in this particular unit. Typical signs of a malfunction are clicks when trying to start the engine, absence of a hum from the compressor, or its immediate shutdown after a few seconds. If you notice that the relay body gets very hot or has traces of melting, replacement becomes inevitable.
In this article we will analyze in detail the trigger mechanism, the diagnostic algorithm and the step-by-step replacement process. You will learn how to select a compatible part among many analogues and avoid common mistakes during installation. A competent approach to repair will extend the life of your refrigerator and ensure its stable operation in the future.
Design and principle of operation of a start-up protection relay
A start-up protection relay is an electromechanical device that controls the operation of the starting winding of the compressor. When the refrigerator is turned on Atlant a high starting current passes through the relay, which is necessary to spin up the motor shaft. As soon as the motor reaches the required speed, the relay opens the starting winding circuit, and the refrigerator goes into normal operation on one working winding.
The design of most relays for models Atlant includes an inductor, a movable core and a contact group. Thermal protection, built into the housing, responds to current strength: if the motor is overloaded or jammed, the bimetallic plate heats up and opens the circuit, preventing the compressor windings from burning out. This is a key element of the safety of the entire system.
There are two main types of relays used in refrigeration technology: posistor and induction. PTC models work by changing the resistance of the heating element, while induction models use the electromagnetic field of the coil. For refrigerators Atlant induction relays of the RKT, RTP series or more modern analogs are most often used.
⚠️ Attention: An incorrectly selected relay may not turn off the starting winding after starting, which will lead to rapid burnout of the compressor. Always check the part labeling before installation.
The differences between relay types are significant and their interchangeability is limited. If your refrigerator had an induction relay, replacing it with a posistor relay without changing the connection diagram is impossible. Therefore, it is so important to visually inspect the burnt part before purchasing a new one.
Diagnostics of the fault before replacement
Before buying a new part, you should conduct a thorough diagnosis to exclude other causes of failure. Often users mistakenly blame the relay, although the problem may lie in the compressor itself or the wiring. The first step should always be to completely disconnect the refrigerator Atlant from the power supply.
After removing the rear protective cover in the compressor area, you must visually inspect the relay. Look for the following signs:
- 🔥 Traces of soot, soot or plastic melting on the relay body.
- 🔨 Mechanical damage, cracks or chips of the housing.
- 🌫️ Oxidation of contacts or the presence of a greenish coating on terminals.
- 👃 Characteristic burning smell emanating from the unit.
If there are no visual defects, you can carry out a “hearing” test. Gently shake the relay near your ear: if you hear knocking or rattling inside, it means the internal mechanisms are damaged. You can also test the contacts with a multimeter in resistance measurement mode. The circuit should ring in a certain position, and when the relay is turned over (imitation of operation), it should open.
In some cases, the malfunction may not be caused by the relay itself, but by a breakdown of the compressor windings. To check this, you need to disconnect the relay and ring the three contacts on the motor itself. The resistance between the working and starting windings, as well as between them and the housing, must comply with technical standards. If there is no breakdown in the housing, and the relay is working properly, the problem may be in the thermostat.
Choosing a compatible relay for the Atlant refrigerator
Selecting the correct analogue is the key to successful repairs. Refrigerators Atlant were equipped with various types of compressors (for example, GVM-10, CT-14), each of which required a specific starting device. The main parameter when choosing is the engine power and the type of refrigerant, although for household repairs the most important thing is the marking on the body of the old part.
The most common relays are the following series:
- 🏷️ RKT-1 i RKT-2 - classic induction relays for single-compressor models.
- 🏷️ RTP-1 i RTP-2 - more modern versions with improved thermal protection.
- 🏷️ 10.134 - universal relays, often used as a replacement for the original ones.
When purchasing, pay attention to the location of the contacts and the shape of the seat. Even if the electrical parameters are the same, the geometric dimensions may differ, and installing the relay on the compressor Atlant will not work without “dancing with a tambourine.” It is best to take a part with exactly the same marking.
| Relay marking | Type | Compatibility (power) | Features |
|---|---|---|---|
| RKT-1 | Induction | up to 200 W | Vertical installation, old model |
| RTP-1 | Induction | up to 250 W | Universal, often included |
| 10.134 | Posistor | up to 300 W | Requires checking the connection diagram |
| PTC-1 | Posistor | up to 180 W | Compact, sensitive to vibration |
Can I use a relay from another brand?
Yes, if the electrical parameters and mounting dimensions match. However, original Atlant relays or proven analogues (for example, Danfoss) last longer and operate more stably. Cheap Chinese copies often fail after a few months, causing the compressor to fail again.
If you cannot find an exact analogue, you can contact a specialized store, where a consultant will select a replacement using the correspondence tables. In this case, be sure to check the model of your compressor, stamped on the metal tag.
Instructions for replacing the relay with your own hands
The process of replacing the start-up protection relay on the refrigerator Atlant is quite simple and does not require specialized tools other than a screwdriver and pliers. The main thing is to act consistently and not to apply excessive force to the plastic elements.
Carry out the work strictly according to the algorithm:
- Unplug the refrigerator and move it away from the wall to access the back panel.
- Remove the protective cover cover at the bottom covering the compressor.
- Inspect the compressor: the relay is placed directly on the motor terminals (plugs).
- Carefully remove the retaining bracket or frame, if present.
- Pull the old relay down, freeing the contacts compressor.
- Disconnect the wires from the terminals of the old relay, having first memorized or photographed the connection diagram.
☑️ Checklist before assembly
Installation of the new element is carried out in the reverse order. It is important to correctly orient the relay: the body usually has an arrow pointing up (“UP” or “UP”), or a lettering that should be read in a vertical position. Orientation is critical for the correct operation of the thermal protection and tripping mechanism.
After connecting the wires and After placing the relay on the compressor plugs, secure the fixing frame. Make sure that the wires do not touch hot parts of the compressor and are at a safe distance. Now you can close the protective cover and turn on the refrigerator.
Checking functionality after connection
After installing the new relay, you need to check the result of the repair. Plug the refrigerator Atlant into the outlet. In the first seconds, you should hear a characteristic start-up click and a smooth hum of the engine. If the compressor started working and began to gain temperature, then the replacement was successful.
Pay attention to the following points in the first 15-20 minutes of operation:
- 🔊 No extraneous knocking, vibration or intermittent humming.
- 🌡️ Uniform heating of the compressor housing (it should not become hot instantly).
- ⚡ Stable operation without spontaneous shutdowns at short intervals.
⚠️ Attention: If after switching on you hear a loud click and the refrigerator immediately goes silent, and after the attempt is repeated for a minute - turn off the device immediately! This means that the relay does not match the parameters or the compressor is faulty (jamming).
For complete confidence, you can measure the current consumption of the compressor with a current clamp. It must match the rating shown on the engine tag. Excess current indicates problems with the mechanics of the motor or improper operation of the relay.
Common mistakes and precautions
When repairing refrigerators on their own Atlant novice craftsmen often make typical mistakes that can lead to repeated breakdowns. One of the most common is ignoring contact cleaning. Oxidized terminals create additional resistance, causing heating and premature failure of the new relay.
Another mistake is incorrect installation of the relay upside down. In induction models, the core must fall under the influence of gravity to open the contacts. If you flip the relay, the starting winding will remain on, which is guaranteed to burn out the motor. Always look for position markings.
It is also dangerous to use a relay with a large gap or play on the compressor terminals. Poor contact leads to sparking and burning of the motor plugs, the repair of which will cost much more than replacing the relay. If the relay contacts are loose, it is better to replace the part with a more tightly fitting one.
Do not forget that replacing the relay is a temporary measure if the compressor has already exhausted its service life. An old motor can consume increased current, which will quickly damage even a new, high-quality relay. In such cases, you should think about replacing the entire compressor.
Questions and answers (FAQ)
Is it possible to temporarily start a refrigerator without a relay?
Technically, you can start the compressor by applying voltage directly to the working and starting windings, but doing this is strictly not recommended for long-term operation. Without thermal protection, the motor will burn out at the first overload or jam. This is only permissible for a short-term check of the functionality of the compressor itself.
Why does the new relay click, but the refrigerator does not turn on?
This may indicate several problems: the compressor is jammed (the motor cannot turn), a break in the internal wiring, or a mismatch in the relay parameters. It is also possible that the relay contacts are not fully seated on the compressor terminals and there is no electrical connection.
Where can you find the relay markings if they are erased?
If the markings on the case are not readable, focus on the appearance and number of contacts. Take a photo of the relay and show the photo to the salesperson at the parts store. You can also select an analogue according to the compressor model Atlantusing reference compatibility tables.
What is the difference between the RKT relay and the RTP?
The main difference is in the design of the thermal protection and materials. RTPs are considered a more modern modification with improved response characteristics. In most cases, they are interchangeable, but it is better to use what is recommended by the manufacturer for a specific series of refrigerators.
How long does the starting relay in a refrigerator last?
The average service life of a high-quality relay is 5–10 years. However, with frequent power surges in the network or unstable operation of the compressor, this period can be reduced to 2-3 years. Regular preventative maintenance and the use of a voltage stabilizer prolong the life of the part.