The normal value is within Grade A standard (≤42DB).
1. The refrigerator is not horizontal enough. The two adjustable feet in front of the refrigerator can be adjusted.
2. The fixing screws or nuts of compressor condenser and other parts are loose, and the water tray is loose.
3, pipeline vibration, because the pipeline suspended for too long, prone to * * * earthquake phenomenon, noise increased significantly, showing periodic fluctuations. When pressing each vibration-prone part, the noise is obviously reduced or eliminated when pressing a certain part. Measures such as reinforcement, cushion stability and isolation can be taken according to different situations, and vibration-reducing cement and rubber sleeves can be used.
4. The hanging spring (seat spring) of the compressor is loose, which leads to abnormal noise such as cylinder scraping, serious wear of internal parts and poor lubrication. The capillary outlet is not smooth, because there is no special capillary clamp, so the outlet cannot be around 45℃.
5. Poor vacuum pumping leads to "snoring", which is characterized by uneven condenser temperature.
6, too much frozen oil into the evaporator, will produce "goo goo" sound of oil bubbles.
7. Noise caused by foam layer shrinkage (back plate falling off or cracking) when the temperature of the box drops (especially when it is used for the first time)
Second, deodorize
If the box smells after a period of use, it is difficult to completely remove the smell, but the following methods can reduce the smell.
1, put a small amount of detergent in warm water, then wipe the inside and nearby parts of the refrigerator, and then rinse it with clean water.
2. Plug the ozone generator into the power supply, put it in the refrigerator (freezer) of 10 for 20 minutes, then put the activated carbon in the refrigerator, and take out the activated carbon after 3 hours.
3. Slice the lemon, put it in the refrigerator for about 5 hours, and take out the lemon. The above methods are more effective when used at the same time, and it is recommended to use medical alcohol when wiping.
Third, the repair of biliary fissure
The reason is that there are about110000 cracks in HIPS and PS plates, and a small number of cracks are caused by internal stress. First, prepare a small bottle of ABS waste, banana oil or acetone, two small glass bottles (with lids), a hairbrush, a small piece of emery cloth and a pair of scissors. Then cut the ABS scrap into pieces, put it in a glass bottle, and then add ketone to immerse it in the pieces. After standing for one day, ABS crumbs were completely dissolved into paste. If it is too thin, you can add a proper amount of scrap. This is the glue used to fill the inner container. In addition, using a glass bottle of acetone to wash off the "glue" on the brush can also be used to cover the patch.
When repairing, first gently polish the crack with emery cloth to remove stains, and then make a small hole at both ends of the lining crack to prevent the crack from expanding after repair. Scrape both sides of the crack with a steel saw blade or sharp blade to expand the crack into a "V" shape. Dip "jiaozi Water" with a brush and apply it to the damaged part. After a few minutes, wait for the "glue" to dry before applying. After repeated coating, the adhesive layer is completely dry and has good strength. After the crack patch is slightly higher than the surrounding area, smooth the uneven place with sandpaper. Finally, dip a clean brush in acetone and apply it to the repaired part to make the surface bright. If the damaged area of the liner is large or there is a hole, you can cut a thin ABS sheet slightly larger than the hole, use acetone as glue, evenly spread it on the contact surface, then quickly bond it, and then polish it with sandpaper after it is firmly bonded. Then add "glue" to the edge of the patch to bridge and cover the seam.
Fourth, the appearance repair technology
L, putty, hardener, according to the ratio of 100: 2, stir evenly, and quickly apply it to the damaged parts of the refrigerator. After curing, gently polish the parts coated with putty with 200 ~ 300 mesh sandpaper. The surface should be smooth, and there should be no concave-convex feeling when touching (note: the polished area should be small).
2. Use a hair dryer to heat the painted parts. After heating, spray half a can of self-painted paint at a distance of about 100rm from the refrigerator (the whole can of self-painted paint is coated with particles and the paint is uneven), and heat it while spraying, once every two minutes, five or six times.
3. When the paint is dry, use 2000-mesh sandpaper to touch the polishing wax and use a towel to polish it quickly.
4. Observe the marked place for several hours. If it has luster (color difference from the whole), use 2000 mesh sandpaper and add water to gently polish it until there is no color difference.
Verb (abbreviation of verb) structural gap adjustment
1. For the gaps between doors and between doors and top platform, adjust the left and right position of the middle hinge according to the correct position of the lower door. After the door is unified with the door, if the gap between the door and the top platform is uneven, the left and right height of the top platform can be adjusted by using gaskets and other methods.
2 The contact between the lower door and the middle frame is too small and there is a gap. An opening pad can be added to the lower hinge to improve the position of the lower door. If it is too tight, a part of the fixing hole of the middle hinge can be milled up and down for adjustment.
3. The gap between the door seal and the box is mainly the deformation of the door seal. The deformed concave part can be baked with a hair dryer to restore the original state and eliminate the gap. Still pay attention to the power of the hair dryer should not be too large, the hot spots should not be too concentrated, and the air outlet should not be too close to the rubber strip, otherwise it will damage the rubber strip. In addition, a thin sponge can be placed in the depression of rubber strip to eliminate the gap.
4, the door is closed tightly, and the light switch is tight, which will produce the sound of opening and closing the door; If the door is too close to the box or the door seal is too thick, the door seal will turn over when opening the door. In the above situation, you can apply a small amount of vaseline. In addition, after the refrigerator is used for a period of time, due to the position deviation of the door, it will light up. At this time, 30l rubber can be used to artificially extend the length of the light switch to ensure that the lights are turned off.
Six, summer door seal condensation
The temperature difference between the inside and outside of the refrigerator door is very large, and the iron plates around it play the role of cold bridge. In the case of high temperature and large temperature difference in summer, the capacity around the refrigerator door seal is prone to condensation, especially in the middle frame between two doors, which is not well ventilated and the temperature of the middle frame is low, which is more prone to condensation. This situation is normal, and it will disappear automatically after a day of high temperature and humidity. If it is too serious, the following measures can be taken to improve it. The route of the condensation pipe is changed from passing through the condenser and then the dew prevention pipe, which improves the temperature of the dew prevention pipe and reduces the condensation phenomenon. (This method is applicable to the system where the anti-condensation pipe is an independent pipe. )
Seven, the refrigerator is difficult to open.
The trouble of opening the door is mostly caused by summer or rainy season. This is because there are irregular holes in the contact surface between the door and the door seal, and moist air enters the holes to form condensation. When the door is closed, the condensation will expel the air in the pores, forming a negative pressure. In addition, the magnetic force of the door seal and the pollution relay will produce mixed suction, so it is difficult to open the door. The removal method is to clean the door seal regularly with soapy water to maintain good elasticity and smoothness, wipe off the condensation and apply a little talcum powder to remove it.
Eight, repair the water box [/b]
The accumulated water in the refrigerator is mostly caused by the blockage of the drain pipe of the refrigerator by foreign objects. The freezing chamber of the upper box is blocked, and its accumulated water needs to be removed manually frequently; The refrigerator under the box is blocked, and the accumulated water will seep out of the box through the bottom layer of the inner container, corroding the metal of the box plate, so that the door of the box cannot be fixed. The removal method is to connect the lower mouth of the blocked drainage pipe with a piece of hose, and repeatedly blow it with air, while pouring a certain amount of drinking water from the inlet, so that the foreign matter can be quickly washed away with the running water.
Nine, computer temperature sensor failure
Replace the temperature sensor when the signal transmission is normal.
1, the temperature display of the refrigerating room shows "El", indicating that the refrigeration sensor is out of order. At this time, the refrigerator enters the automatic protection mode: start 15 minutes, and stop for 30 minutes at regular intervals. If the ambient temperature is less than or equal to 10℃, the start of heating is compensated for 10 minute when the compressor stops, and when the ambient temperature rises to10 minute.
2. The display of "E2" in the temperature display of the freezing room indicates that the freezing sensor is out of order. At this time, the refrigerator enters the state of automatic protection mode: the start and stop of the compressor are controlled according to the temperature of the refrigerating room.
3. When "EF" is displayed on the temperature display of the refrigerator, the defrosting sensor of the refrigerator fails, and the running state of the refrigerator will not change, and the defrosting will be controlled based on time.
4. In the quick freezing state, if the sensor of the cold storage room fails, the compressor will be turned on for 20 minutes, and then stopped for 30 minutes; If the sensor of the freezer is out of order, it will not be affected.
5 "EE" is displayed on the temperature display screen of the freezer, indicating that the ambient temperature sensor is out of order. The default ambient temperature of the system is between 15℃ and 30℃.
Ten, the refrigerator drain ice plug processing method
When the drainage pipe is blocked by ice, a tee can be added at the outlet of the compressed high-pressure pipe to directly connect the original pipes at both ends of the tee, and a copper pipe with a length of 5 cm and a diameter of 6 MM is connected at the other interface of the tee, and one end of the copper pipe is sealed, inserted into the drainage pipe, and refilled with refrigerant.
XI。 Installation of heat sink in backplane
For example, the high-pressure leakage condenser leaks, and generally only one side of the radiator leaks. You can install a cooling tube on the back, dig out the copper tube on the foam layer, and then stick the copper tube on the back plate with aluminum tape.
Twelve. Treatment of micro-leakage
It takes a long time to keep the pressure to make the refrigerant leak. This situation is generally the leakage of pipeline joints, and only the method of repairing the joints is adopted first. If it leaks after repair, we should consider other issues.
Thirteen, door seal maintenance skills
1. Due to the aging and hardening of the magnetic door seal, it loses its elasticity and makes the cold air in the box escape. In this case, the entire door sealing strip should be replaced. In actual maintenance, if there is no door sealing strip of the same model, the following methods can be used to solve such problems.
Select a pair of slightly larger door seals, adjust the size and cut them off. When cutting them, you can take a pair of diagonal corners, and it is best to keep two right angles between the upper right and the lower left. The notch of the door sealing strip should be cut at a 45-degree oblique angle so as to butt at a 90-degree right angle. And leave a margin of about 4mm on each side, so that it can be used in hot bonding (bonding with electric soldering iron after melting). Trim the joint with a blade to make it smooth and ensure the tightness of the door sealing strip.
2. Generally, the door sealing strip will be deformed due to blowing from the hot air gun. If individual positions cannot be restored, the door sealing groove can be filled with foam. The door seal is easy to fall off, which can be solved by gluing the four corners and the middle position of the door seal, but large-scale gluing is not allowed.
Fourteen Replacement of capillary tube in refrigerator
When replacing a new capillary, the flow rate should be detected. During testing, the outlet of the new capillary tube shall not be welded with the inlet of the evaporator. High and low pressure maintenance valves and instruments shall be connected at the high and low pressure inlet and outlet of the compressor. The other end of the maintenance valve of the high-pressure part is connected with the inlet of the condenser of the refrigerator, and the process pipeline is connected with the drying filter and communicated with the atmosphere. When ready, turn on the power supply, start the compressor, and suck the filtered dry air from the low pressure until the pressure indicated by the pressure gauge on the low pressure maintenance valve is equal to the external atmospheric pressure, and the pressure gauge pointer of the high pressure maintenance valve is specified at a certain value. If the pressure exceeds 10 ~ 12 kg/cm2, it means that the capillary is too long, and a section of capillary can be cut off until it is suitable. If the pressure f is lower than 10 ~ 12 kg/cm2, it means that the capillary is not long enough, and the capillary should be replaced and re-measured. Connect the capillary with the inlet pipe of the evaporator until the flow rate is suitable.