Maintenance method of refrigerator compressor without stopping The focus of non-stop compressor maintenance is on the cooling effect. If the cooling effect is normal without stopping, the fault is in the thermostat. Otherwise, it is because the system lacks fluorine and the temperature falls below the control point, which results in non-stop. When repairing, it is necessary to suppress leaks, evacuate and recharge fluorine, and encounter non-stop faults. First stop it for a few minutes. Then determine the cause of the fault according to the following phenomena: touching the exhaust pipe of the compressor does not generate heat, the intake pipe of the condenser does not generate heat, and the temperature of the liner does not drop, indicating that the fluorine leakage in the system is complete. The temperature in the box is not low, the contacts of the thermostat cannot be opened, and the power supply of the compressor cannot be cut off, so that the compressor is always running when it is powered. This phenomenon is called fluorine leakage. Another phenomenon is the lack of fluoride, that is, insufficient fluoride in the system. The temperature of the system does not drop, and the compressor does not stop. But the system can cool, but the cooling effect is worse. Touch the compressor exhaust pipe. The intake pipe of the condenser will generate heat, about 50℃-60℃, there are obvious temperature differences between the upper, middle and lower parts of the condenser. In order to judge the cooling effect, put a bowl of cold water in the freezer (put the bowl in the hanging basket of the freezer) Cool water, but do not put it on the bottom of the freezer), put the thermostat in the strong cold position, usually it can form solid ice within one hour. At this time, the temperature in the cold storage room can be reduced to less than 10°C (normally it can be reached within 30 minutes). If this refrigeration effect can be achieved, the refrigeration system is normal. The compressor cannot be stopped because the thermostat is faulty. If this refrigeration effect cannot be achieved, it means that the system lacks fluorine. Need to recharge fluoride. After releasing the fluorine in the system, it is necessary to suppress leaks, evacuate and fill the fluorine, and seal, and follow the maintenance process described above.
Judgment of thermostat failure: The premise of judging thermostat failure is that the cooling effect is normal. The compressor does not stop.
First check whether the temperature sensing tube is out of the normal position, whether the fixing screw of the thermostat is loose, and then adjust it again to observe the cooling effect. If the refrigerator compartment has dropped to less than 10°C and the freezer compartment has dropped to below 0°C, the temperature of the high-temperature controller should be adjusted properly and it still does not stop, you need to check the thermostat again.
There is a simple way to determine whether the thermostat contacts can be opened: remove the thermostat, put it in the freezer of the refrigerator or the bump on the top of the freezer, close the door of the refrigerator or the lid of the freezer, and connect the temperature control The two wires of the controller are short-circuited, let the compressor run for about 30 minutes, and then take out the thermostat, quickly test whether its two contacts can be disconnected with a multimeter R×1 (the thermostat rotates to Intermediate cold position), if it still can't be disconnected at low temperature, the temperature sensor has been leaked and needs to be replaced. If the contact can be opened, the temperature sensing head has not deviated from the normal temperature sensing position. Then the system is short of fluorine, and it needs to be treated with fluoride. The contact of the thermostat is closed at normal temperature, and the contact can be opened at the set low temperature. According to this principle, it can be judged whether the thermostat is normal and whether the system lacks fluorine. However, it should be noted that the ice in the liner is too thick or the food temperature is too high and too much. The compressor will not stop. Too thick for the icing of the liner. When handling, the refrigerator with defrost circuit should first check whether the defrost circuit is normal. Refrigerators without a defrosting circuit will be shut down to manually defrost, and then turned on again, and the failure without stopping can be eliminated.
