The refrigerator starter and protector take the meter to measure 220 volts, why does the compressor

When using the repaired refrigerator compressor, you will encounter the problem that the thermal protector and starter do not match the compressor, and only by choosing the thermal protector and starter that matches the compressor can the compressor work normally.

Most of the damage caused by the refrigerator compressor is caused by the power supply voltage change exceeding the specified allowable range (some below 180V, some over 240V). In order to prevent the compressor from being damaged by voltage changes, it is necessary to test the disconnection current of the thermal protector and the reset time of the bimetal sheet; Perform a start-up and release current test on the hammer starter to find out the accessories that meet the working conditions of the compressor.

Selection of thermal protectors.

The function of the thermal protector in the circuit is: when the compressor is overloaded, its overload current is very large, and the overload current flows through the thermal resistance wire in the thermal protector, which heats the thermal resistance wire, causes the disc-shaped bimetal sheet to bend and upturn, disconnect the contact point, cut off the current, and play a role in protecting the compressor. The selection of the thermal protector to match the compressor is to make the disconnection current of the thermal protector slightly less than the protection current of the compressor.

The method of measuring the protection current of the compressor is (see Figure L): connect the running winding of the compressor to the 165V power supply (the starting winding is not energized, and the compressor is in the hot state), and the current indicated by meter A is the protection current of the compressor.

The disconnection current method of the heat protector is (see Figure 2): at room temperature, the output voltage of the voltage regulator is terminated on a transformer with a power of about 20W and a voltage of about 220V 6V, the thermal protector is directly connected to the 6V output end of the transformer, and the current passed by the thermal protector is measured with a clamp ammeter and the energizing time is recorded. Regulates the voltage regulator to change the current through the thermal protector.

If the butterfly bimetal of the thermal protector can be disconnected within 5 to 14 seconds, then the current passing through the thermal protector is the disconnecting current of the thermal protector. If the disconnection current of the thermal protector is slightly less than the pick-up current of the compressor, then the thermal protector is exactly the right match for the compressor, and the reset time of the thermal protector is also dependent. The butterfly bimetal plate reset time should be 2 5 minutes, a long reset time is good for the compressor.

If the butterfly bimetal sheet has a short reset time, the pressure difference between the high-pressure exhaust end and the low-pressure suction end of the compressor is too large, and the compressor cannot start, and the current through the compressor winding is very large, which will cause the winding to burn out. Usually at room temperature, the disconnection current of the thermal protector should be matched with the compressor of about 100W (1 8HP-1 7HP) when it is about 4A; The thermal protector disconnect current can be matched with a compressor of about 120W (1 6HP) when it is left and right; The disconnection current of the thermal protector can be matched with the compressor of about 145W when it is left and right; The thermal protector disconnect current can be matched to a compressor of about 150W (1 5HP) when it is left and right.

The common reason is that the ambient temperature is too low, when the ambient temperature is lower than 0, the oil of the compressor will thicken, the lubricity will also be affected, the refrigerant will stop flowing, and if the refrigerator is used continuously, it will cause damage to the compressor.

What should I do if the compressor is not working?

First look at the thermostat and the temperature compensation switch, if the room temperature is below 10, you need to turn these two tools on.

Unplug the power supply of the refrigerator, adjust the temperature control to the maximum and then connect the refrigerator power supply, observe whether the compressor of the refrigerator can run normally, if it can run normally, it means that there is no problem with the compressor, if it cannot operate normally, it means that the refrigerator thermostat is broken.

The refrigerator compressor can't work normally, this situation is either the compressor is broken, or the temperature controller is broken, first of all, you need to check the refrigerator temperature controller, it may be because the refrigerator has turned on the overheating protection or the bending insulant is leaking.

If the refrigerator light is still on, it means that there is no problem with the main line, then check the thermostat to see if there is a voltage sent to the compressor, if not, the thermostat is damaged, you also need to check the starting coil of the compressor and the starting resistance, if the refrigerator is abnormal, you also need to ask professional personnel to come to repair and check.

After making sure the plug is tightly connected to the outlet, if the refrigerator does not continue to work properly, there could be several reasons. Low circuit voltage, damaged compressor or problems with other parts, etc., are just a few common reasons why refrigerator compressors don't work.

Clause. 1. The circuit voltage is abnormal. When the supply voltage in the home is lower than the rated voltage, the refrigerator will not function properly. It is necessary to make sure that the power supply at home is sufficient to ensure that the voltage is normal and stable.

There is damage inside the compressor, and the fuse blows. Because the refrigerator continues to work for a long time, it may lead to wear and tear of the refrigerator compressor in the process of time and time, and the internal overheating causes the fuse to blow and the compressor stops doing work. This only requires someone to help replace the fuse. Brother Nian.

The internal temperature of the refrigerator reaches the expected temperature during the rest period. Because the refrigerator has a preset internal temperature, when the temperature sensing system detects that the internal temperature has reached the ideal temperature, it will stop working for a period of time, during which the compressor will not work normally, which is a normal phenomenon. However, if it does not work for a long time and the internal temperature is almost the same as the outdoor temperature, it may be that there is a problem with the refrigerator element.

In this case, you need to find someone to help check and repair to determine what is wrong inside the refrigerator.

Under normal circumstances, there are three reasons why the compressor does not work after the power is turned on, if there are other problems, it is recommended that experts give it a recommendation to overhaul, and do not disassemble the refrigerator for inspection without authorization.

First of all, check whether the refrigerator plug is energized and whether it is a short circuit in the socket circuit. You can test it with an electric pen, and of course, you can also test other electrical appliances with a socket. Check whether the socket has electricity, if the refrigerator socket has no power, it will cause the compressor to not work, you can also check whether the compressor is broken, or the refrigerator refrigerant leaks.

What should I do if the refrigerator is powered on and does not refrigerate?

The work of the refrigerator is completely dependent on the refrigerant, if there is a problem with the condenser tube of the refrigerator, the refrigerant will cause leakage, then the refrigerator will not refrigerate, first need to repair the condenser tube, and then add refrigerant.

If there is a problem with the thermostat of the refrigerator, the temperature of the refrigerator will also be affected, and the refrigerator will also not refrigerate, most of the thermostats are all installed in the refrigerator compartment of the refrigerator, if the temperature of the refrigerator is low, the refrigerator will work for a long time, and the thermostat may have problems.

If there is a problem with the compressor, it will also cause the refrigerator to not refrigerate, and the compressor cannot work normally after the refrigerator is connected to the power supply, because the compressor is broken, so it needs to be replaced with a new compressor. If you want to judge whether the compressor is faulty, you can listen to the sound inside when the compressor stops working, if it is a bell sound, it means that the compressor is not a problem.

Freezer storage methods and precautions:

1. Turn off the power to the freezer and take out all the stored items in the freezer;

2. Open the freezer door, remove the plug of the drainage hole at the bottom, and wipe off the residual water with a clean towel after all the frost in the freezer has completely melted into water and drained clean;

3. Plug the drainage hole on the upper back, keep it open and thoroughly dry the moisture inside the freezer;

4. Place the freezer in a dry and ventilated place, and cover the freezer with a plastic cover to prevent the electrical components of the freezer from being damaged by moisture and the dust on the surface of the freezer due to excessive humidity for a long time;

5. During the storage period of the freezer, it is best to open the door regularly and check whether there are signs of mold inside, and if there is, clean the internal surface of the freezer again

6. If conditions permit, you can open the cover plate on the side of the freezer and the periphery of the radiator to properly clean the dust and debris in the compressor part of the freezer, and do not touch or damage the pipes and accessories of the freezer refrigeration system during the cleaning process.

Check that the neutral line of your home line is not connected to the neutral line of the external power supply!