(1) The washing machine panel door is not closed properly or the top cover switch is damaged, which may also be due to poor contact of the switch. Because the washing machine runs at high speed during dehydration, it is not allowed to open the top cover, so there is a linkage switch on the top cover, and the circuit will be automatically disconnected as soon as the cover is opened. If it is damaged, dehydration will not work.

(2) The drainage system of the washing machine is blocked or the drainage valve is damaged, so that the washing liquid in the water container cannot be discharged, or there is too much foam in the water container, which makes it difficult to discharge the washing liquid in the container for a while, and the water level switch cannot be reset, so that the washing machine cannot enter the dehydration program.

(3) The drain valve does not open the clutch switch, and the washing and dehydration of the automatic washing machine is completed by changing the gear position at the bottom of the solenoid valve. The damage of the solenoid valve will also make the dehydration unable to operate normally.

(4) The motor performance is not good, and the output power is insufficient due to the capacitor problem, which can be solved by replacing the capacitor.

(5) The fastening screw of the washing machine inner barrel is loose, or the bracket at the bottom of the washing machine inner barrel is damaged. If so, in most cases, an empty washing machine can be dehydrated.

(6) The washing and dehydration of automatic washing machine is completed by changing the gear position at the bottom of the solenoid valve, and the damage of the solenoid valve will also make the dehydration unable to operate normally.

Extended data

The washing process of washing machine is mainly to pull dirt into the water under the mechanical action of mechanical drainage and washing and the wetting and dispersion of detergent to achieve the purpose of washing. First of all, the washing liquid filled between the blades of Apollo wheel is thrown to the barrel wall at high speed under the action of centrifugal force and rises along the barrel wall.

In the center of the impeller, because the thrown liquid forms a low pressure area, the washing liquid flow echoes around the impeller. In this way, an eddy current centered on the impeller axis is formed near the impeller. Under the action of eddy current, the clothes make a spiral rotation, are sucked into the center and then thrown to the bucket wall, and rub against the bucket wall.

Because the center of the pulsator is a low-pressure area, clothes are easily sucked near the pulsator and constantly rub against the pulsator, just like rubbing clothes manually, and dirt is forced to leave the clothes.

Secondly, when clothes are put into the washing liquid, due to the slow inertia movement, there is a speed difference between the water flow and the clothes, which makes them move relatively, and the water flow rubs against the clothes relatively, which also helps the dirt to leave the clothes.

Thirdly, due to the irregular shape of the washing surge, when the rotating water hits the barrel wall, its speed and direction change, forming turbulence. Under the action of turbulence, the clothes move irregularly and roll, and their fibers are constantly bent and twisted, and the clothes rub against each other, which increases the effective area of washing and improves the uniformity of washing.

The water level switch is actually a pressure switch. The inlet of the air chamber is connected with the air storage chamber in the washing barrel. When water is injected into the washing tub, the air storage chamber is quickly closed. As the water level rises, the water level of the air storage chamber also rises, and the pressure of the enclosed air also increases. The corrugated diaphragm 2 in the water level switch expands under pressure, pushing the ejector pin 3 to move, changing the contact point 4, and realizing automatic on/off.

The intelligent fuzzy control automatic washing machine can also automatically judge the water temperature, water level, clothes quality and clothes dirt, and decide the appropriate amount of detergent and the best washing program. When the quantity and texture of clothes in the washing bucket are different, the total weight will be different if water is injected to make them reach the same water level.

Taking advantage of this, the quality and quantity of clothes can be judged by measuring the inertia of the washing motor after low-speed rotation. The method is as follows: after a certain amount of water is injected into the washing tub, the motor runs at a low speed, and after it stabilizes, the power is cut off quickly, and the washing tub drives the motor to continue to rotate under the inertia.

At this time, the motor winding generates back electromotive force, rectifies its half wave, amplifies and shapes it, and obtains a rectangular pulse sequence. By analyzing the pulse number and pulse width. You can get the quality and quantity of clothes.

The dirtiness of clothes is judged by the transparency of water. An infrared photoelectric sensor is added at the drain of the washing barrel, so that the infrared light passes through the water and enters the receiving pipe on the other side. If the transparency of the water is low, the light energy obtained by the receiving tube is small, indicating that the clothes are dirty.

Piezoelectric sensors are used for dehydration. When the dehydration barrel is highly rotated, the water sprayed from the dehydration barrel acts on the piezoelectric sensor, and the dehydration operation automatically stops according to this pressure change.

Common faults and solutions of automatic washing machine;

1, the water won't stop

A, generally speaking, the inlet valve spool is stuck and cannot be reset after power-on, resulting in continuous water inflow. In this case, replace the water inlet valve first;

B, if the fault is not solved, the problem lies in the water level switch. After long-term use, the water level switch can stop water inflow, resulting in water inflow. At this time, the water level switch should be replaced.

C, if the pressure pipe is worn and broken for a long time, or the pressure pipe leaks due to poor contact or disconnection with the water level switch and the gas nozzle of the outer barrel, it can also lead to water leakage. Because the pressure is insufficient and the water level switch does not act, the computer board mistakenly thinks that the water level is flooded. At this time, check whether the pressure pipe is worn or not, and whether the two connectors are poorly contacted or disconnected;

D, due to the use of a long time, there is a foreign body blocking the nozzle, resulting in pressure can not be transmitted to the pressure switch, at this time should unscrew the big nut, and then take out the inner barrel, take out the foreign body blocking the nozzle.

E. If all else fails, try to replace the computer board, because all actions are controlled by the computer board.

2. There is no water

A. Turn on the power supply, and when the ear is close to the water inlet valve, check whether there is buzzing. If yes, check whether the tap water is cut off, turn off the faucet, close the inlet pipe connector, and check whether the filter screen of the inlet valve is blocked. If the filter screen is pulled out for cleaning, the water inlet valve will be replaced if the problem is not solved, and the valve core of the water inlet valve may get stuck and cannot be opened.

B. If the water inlet valve does not buzz, try to replace the computer board at this time. The problem may be the computer motherboard.

3, no dehydration

A, first check the safety switch, turn on the power program of the washing machine, and adjust it to the dehydration state. Press the brake arm of the safety switch to the lowest position by hand or tool. If the computer board gives an alarm, the digital tube displays "E 1", and then replace the safety switch or computer board;

B. If the brake arm of the safety switch can be dehydrated normally after being pressed by hands or tools, it means that the power-off distance of the safety switch is low, and the safety switch should be replaced at this time;

C. If there is only one impeller and the inner barrel does not rotate during dehydration, check whether the traction machine has separated the pawl and ratchet of the clutch. If it is not possible, the adjusting rod nut on the steam trap is loose and worn, resulting in insufficient opening distance. At this time, re-adjust the distance of the adjusting lever to separate the pawl and ratchet of the clutch.

References:

Baidu encyclopedia-automatic washing machine