First, look at the appearance. Make sure that the model of the freezer is correct, check that the color of the freezer is satisfactory, and that the surface is smooth, flat, and free of scratches and looseness. The interior of the freezer needs to be smooth, free of cracks and bubbles, non-uniform, and free of odors and stains. The circumference of the freezer and cold drink door should be straight, the components should be firm, the freezer door should not be skewed, and the gap between the rotating shaft and the pin should be exactly matched. The contact area of cold drink cabinet door, freezer and sill shall not leak foaming liquid.
Second, the boot check. After turning on the power, first check the door. When the door is closed, the door of the freezer close to the door frame will close automatically due to the attraction of the magnetic stripe, and there should be no gap. Then check the compressor. After the power is connected, the freezer can be started immediately and enter the operating state; when the power is turned off, the freezer should stop normally; after restarting, the compressor should be able to start and operate normally within 1 second.
Third, check the refrigeration. 5 minutes after the freezer is started, touch the freezer's condenser (on both sides or back of the freezer) with your hand. It should feel sweltering, and the faster the heat, the better; when opening the door of the freezer, touch the evaporator with your hand, you should have a cool feeling; close the door of the freezer for about 20 minutes, a part of the condenser is already hot, open Take a look at the evaporator door of the cold drink cabinet. There should be a thin layer of frost on the evaporator. If the frost is uneven or there is no frost in a certain part, the refrigeration performance of the freezer is not good. Users can put a few glasses of cold water in the freezer, and then adjust the cold drink cabinet to a quick freezing state. Freezing time and efficiency can be used to check the freezer capacity and compressor performance.
Fourth, temperature control. When the temperature controller is adjusted to the stop position, the compressor should stop immediately; when adjusted to the strong cold position, the compressor should run continuously; after the refrigerator has been running normally for a period of time, it should be able to automatically open and stop within a certain time interval. At this time, the temperature of the refrigerator compartment should not be higher than 5 ° C, and the temperature of the freezer compartment should reach the star level. The number of compressor starts should not exceed 6-9 times per hour.
Freezer
Fifth, listen to the sound. After the compressor starts, the freezer will vibrate slightly and generate operating noise, but the noise must not be higher than 45 decibels. That is, in a quiet environment, only a slight click can be heard about 1 meter away from the freezer. There should be no sound in the distance. Touch the freezer with your hand and there should be no significant vibration.
6. Check the lighting. Open the refrigerator door, the light inside the freezer cabinet lights up; when the freezer cabinet door is almost closed, the light goes out.
Check the freshness of the freezer. You can put some apples in the freezer and observe the freshness of the apples two days later. Although this project cannot be implemented in a timely manner, it can at least prevent consumers from losing money from hindsight.
