How to replace the compressor on an Atlant refrigerator: instructions with photos and videos

Replacing a compressor in a refrigerator Atlant is a task that frightens many owners. In fact, with proper preparation and compliance with safety precautions, you can handle it yourself, saving on the services of a specialist. The main thing is to understand the principle of operation of the system and not skip critical steps, such as evacuation or checking for leaks.

In this article we will analyze the entire process from diagnosing a malfunction to the first start of the refrigerator after repair. You will learn what tools you will need, how to properly disconnect the old compressor, install a new one, and avoid common mistakes. We will pay special attention to models Atlant with a system No Frost —they have nuances that are often silent about in general manuals.

If your refrigerator hums, but does not freeze, or the compressor turns on for a few seconds and turns off, most likely That's where the problem lies. But before replacing, be sure to check the thermostat and relay: sometimes the reason lies in the little things. Next you will find a checklist for diagnostics and step-by-step instructions with photos of each stage.

Signs of a compressor malfunction: when replacement is needed

The compressor is the “heart” of the refrigerator, and its breakdown is clearly visible. Here are the key symptoms that indicate the need for replacement:

• 🔊 Loud hum or knocking during operation (normal noise - uniform, without clicks or vibrations).
• ❄️ Lack of cold in the chambers, despite the motor running (check if the capacitor at the back is heating up).
• ⏱️ The compressor turns on for 5-10 seconds and turns off is a sign of an interturn short circuit or a problem with the starting relay.
• 🔥 The compressor housing gets very hot (normally it is warm, but not scalding).
• 💡 The light inside is on, but the refrigerator does not freeze —a winding break or piston jamming is possible.

Before changing the compressor, rule out other faults:

1. Check thermostat - short-circuit its contacts (if the refrigerator starts working, the problem is there).
2. Inspect starter relay for burnt contacts or cracks.
3. Make sure that fan (in models with No Frost) rotates freely.

If all these elements are working, and the refrigerator still does not freeze, the compressor must be replaced. For models Atlant compressors are most often used Danfoss (series NL, NF) or Secop (former Danfoss). Check the model of your compressor using the sticker on the case - it should begin with letters M, L or C (for example, M72Z or L108H).

⚠️ Attention: If the compressor is “jammed” (the shaft does not rotate when voltage is applied), do not under any circumstances try to disassemble it. There is freon inside under pressure - when opened it will escape out, which is dangerous to health.

Preparation for replacement: tools and materials

To replace the compressor you will need:

Also prepare:

• 🧤 Protective gloves and glasses — when working with freon and soldering.
• 📸 Camera or phone —to record the location of the tubes and wires.
• 🧲 Magnet —for holding small fasteners.
• 🔧 Screwdrivers (phillips, flat) —for dismantling the back panel.

If you have never worked with refrigeration equipment, practice soldering copper pipes in advance. To do this, buy a piece of tube with a diameter of 6–8 mm and try to solder it with a fitting. The main thing is not to overheat the copper, otherwise it will lose its strength.

⚠️ Attention: Freon R600a (isobutane) is explosive! When refueling, avoid open flames and sparks. Work in a well-ventilated area.

Unplugged the refrigerator and defrosted it|Prepared the workplace (ventilated, dust-free)|Checked the availability of all tools list|Took pictures of the location of the tubes and wires|Put on protective gloves and goggles-->

Dismantling the old compressor: step-by-step instructions

Start by disconnecting the refrigerator from the network and defrosting it (if it is still working). latches. In models

1. Remove the back panel - it is usually secured with screws or latches. In models Atlant with No Frost it may be necessary to remove the internal cover of the freezer to access the evaporator.
2. Disconnect the start relay —it is attached to the compressor from the side. Carefully remove the terminals, having previously photographed their location.
3. Have a bite. tubes, going to the compressor, with a pipe cutter or hacksaw. Leave a margin of 10-15 cm for further soldering.
   How to cut tubes correctly?

   Use a pipe cutter, not a hacksaw - it leaves a smooth edge without burrs. If the tube is flattened when cutting, widen it with a reamer of the appropriate diameter.

4. Unscrew the compressor fastenings (usually 3-4 bolts) and carefully remove it. Be careful - there may be freon under pressure in the system!

After dismantling, inspect the tubes for cracks or oxidation. If they are in poor condition, it is better to replace them completely. Also check filter drier (the metal cylinder on the condenser tube) - when replacing the compressor, it too. need to be updated.

At this stage, many people make a mistake: they forget to label the tubes (suction and discharge). tags on them or make marks with a marker. Atlant the suction tube is usually thicker (6–8 mm), and the discharge tube is thinner (4–6 mm). But it’s better to immediately stick tags on them or make marks with a marker.

Installing a new compressor: nuances for refrigerators Atlant

Before installing a new compressor:

1. Check its integrity — there should be no dents or traces of oil on the housing.
2. Compare labels with the old compressor. It should match:
   • 🔹 Freon type (R134a or R600a).
   • 🔹 Cooling capacity (indicated in the model, for example, M72Z — 72 W).
   • 🔹 Voltage (220–240 V for household models).

Replace the filter drier —it is disposable and clogs when the system depressurizes.

Next:

4. Solder the tubes to a new compressor, using solder with a melting point not above 250°C (for example POS-30). Do not overheat the soldering area - this can damage the rubber seals.
5. Install the compressor in place, make sure that it stands level - vibration during operation is unacceptable.
6. Connect the start relay according to the diagram (usually it is on the relay cover or in the instructions for the refrigerator).

In models Atlant s No Frost after replacing the compressor, it may be necessary reflashing the electronic unitif the new compressor has a different power. Check with the seller or service center.

Evacuation and charging with freon: critical moments

After installing the compressor, the system you need vacuum to remove moisture and air. To do this:

1. Connect vacuum pump to the service pipe (usually a tube with a filling valve).
2. Turn on the pump for 15–20 minutes. The pressure in the system should drop to -1 bar (check with the pressure gauge).
3. Close the pump valve and wait 10 minutes - if the pressure gauge needle does not rise, the system is sealed.

Next, fill the freon:

4. Connect the freon cylinder through the pressure gauge station. R134a use a hose with a blue tip, for R600a - red.
5. Open the cylinder valve and slowly fill the system. The pressure for R134a is about 0.5–0.7 bar (with the compressor turned off).
6. Turn on the refrigerator and add freon to the operating pressure (usually 2–4 bar on the discharge tube).

For refrigerators Atlant the volume of freon is indicated on the compressor nameplate or in the technical data sheet. For example, for the model Atlant MHM-1808 with compressor M72Z requires ~100 grams R134a. If you refill R600a, remember: it is lighter air, so if there is a leak, it accumulates in the upper part of the room - avoid open fire!

⚠️ Attention: If after refilling the compressor works, but the refrigerator does not freeze, there are two possible reasons: undercharging of freon or blockage in the capillary tube. In the first case, add refrigerant, in the second, flush the system with nitrogen (this requires special equipment).

First start and operation check

After refueling:

1. Turn on the refrigerator and let it run for 1-2 hours. During this time:
   • 🔹 The compressor should hum evenly. without clicking.
   • 🔹 The condenser (grid at the back) should heat up.
   • 🔹 After 30-40 minutes, the freezer should begin to cool.

Check the temperature in the chambers with a thermometer -18°C and below, in the refrigerator compartment - +2…+5°C.

Inspect the soldering areas for oil stains - this is a sign of leakage.

If the refrigerator is unstable:

• 🔊 The compressor turns off too often - freon may be refilled or the thermostat may be faulty.
• ❄️ Frosting of the rear wall —clogging in the capillary tube or excess freon.
• 🔥 The compressor is hot, but does not cool —lack of freon or valve malfunction.

In models with No Frost after replacing the compressor, an alarm may sound (the light flashes or the buzzer sounds). Reset the error by holding the button Super Freeze or Alarm Off b. for 5 seconds (the exact combination is indicated in the instructions).

Typical errors and how to avoid them

Even experienced technicians sometimes make mistakes when replacing a compressor. Here are the most common ones:

Another common problem is incorrect position of the compressor.. It must be strictly horizontal, otherwise the oil from the crankcase will not flow into the lubrication system, which will lead to jamming. Models Atlant are provided with adjustable legs or rubber shock absorbers for this.

If after replacing the compressor works, but the refrigerator freezes slightly, check:

• 🔹 Freon pressure (should be 2–4 bar on the discharge tube).
• 🔹 Fan operation (in models with No Frost).
• 🔹 Thermostat - it may not give a signal for cooling.

FAQ: Frequent questions about replacing the compressor

Is it possible to replace the compressor without a vacuum pump?

Theoretically it is possible, but the risk is very high. Without evacuation, moisture remains in the system, which, when interacting with freon, forms acid. This leads to corrosion of the pipes and repeated failure. If there is no pump, at least flush the system with dry nitrogen (but this does not guarantee complete removal of moisture).

How much does a new compressor cost for Atlanta?

The price depends on the model:

• 🔹 Compressor Danfoss NL50Z — from 4,500 ₽.
• 🔹 Compressor Secop (Danfoss) M72Z —from 6,000 ₽.
• 🔹 Compressor LG R134a (for new models)—from 7,500 ₽.

Buy only in trusted stores - there are many fakes on the market with a short service life.

How to understand that the compressor has burned out and not the relay?

It is easy to distinguish a compressor failure from a relay failure:

1. Remove the relay and check the compressor with a multimeter in ohmmeter mode:
   • 🔹 The resistance between the windings should be 20–50 Ohm.
   • 🔹 If the device shows 0 (short circuit) or ∞ (open) - compressor is faulty.

If the compressor “rings” normally, but does not start, the problem is in the relay or thermostat.

Is it possible to install a compressor from another refrigerator?

It is possible, but only if it completely matches:

• 🔹 Type of freon.
• 🔹 Cooling capacity (W).
• 🔹 Voltage and current.
• 🔹 Size and location of tubes.

For example, a compressor from Indesit marked L108H is suitable for some models Atlantif they are designed for R134a and have the same power. But it is better to use a “native” compressor.

What to do if after replacement the compressor heats up and turns off?

There may be several reasons:

1. Overheating due to lack of oil — when replacing the compressor, some of the oil remains in the old one. Add oil through the service pipe (use oil PAG For R134a or mineral for R600a).
2. Clogged capillary tube - requires nitrogen purge or replacement capillary.
3. Faulty relay —check the contacts, replace if necessary.
4. High pressure in the system — freon may have been refilled. Bleed off the excess through the service valve.

If the problem persists, contact a technician - diagnostics of the electronic unit may be required.