In the machine, refills the electronic brain. For example, a timer with a group of contacts, locked by gears with different pitch( like clock hands: second, minute and hour), in modern models, the electronic brain of a product often does the work - repairmen are so afraid of breakdowns. What to do if the washing machine does not squeeze? Let's make a detailed excursion, having disassembled the indicated part before the screw, so that the readers would understand what the action is being done for and remain fully armed if they have to fix the washing machine.
How the drainage of the washing machine
is arranged A couple of introductory instructions for how to fix the washing machine. Water is supplied by the riser pressure. Admits fluid inlet valve, designed for a voltage of 220 V. The process is managed by the brain and the pressure switch. Imagine figuratively as a logical scheme or a system of chiefs:
- Brain: it seems, it is supposed to begin the rinsing stage, I give permission!
- Pressostat: I am aware that there is no water in the tank, I need to dial. ..
- Inlet valve: it will be executed.
Timer understands that the set point should begin. Through the contact system, it makes it clear to the body of the washing machine, which gives permission for water intake. But the fence will not happen if against the pressure switch, monitoring the level in the tank. If both are confident that the time has come to draw water, the inlet valve will deign to open. The stream will rush into the tank. The inlet valve is:
Depends on modes and control circuit.
A rough example, the brain says: Pre-rinsing is now assumed. And the potential is supplied to the part of the valve, the hose of which leads directly to the tank, bypassing the compartment with powder or detergent. The pressure switch is not against, the details do not care what stage the wash is in, the device’s duties include only the alarm of the water level. When it is time to wash, the brain( programmer, timer, electronic circuit) gives a signal to another part of the valve, water washes away the powder from the tray. If rinsing is required, a third section will be activated. Not the dogma that washing machines work in this way, just a creative example.
Similarly, the engine is operated, controlled by electronic filling. Then he slowly turns the drum to the side, then accelerates on the spin. We add that the motor controls the thyristor( triac) voltage cutoff circuit, which cuts off more or less of any peak. Depending on the angle, the motor turns more slowly or faster. The speed of rotation is monitored by a tachometer, telling the scheme whether the cut-off is correctly chosen. In addition, the thyristor controller is guided by the magnitude of the spark: the adjustment is performed in the same way within the mode.
Responsible for draining:
- Level sensor( pressure switch).
- Drainage pump.
- Hose system with pre-filter.
Washing machine drain system
Let's get acquainted with the washing machine drain system. A drainage pump is responsible for the process. Its impeller pushes water into the side channel due to centrifugal acceleration. Principle work is similar to the vacuum cleaner method. Only the motor is asynchronous, and the cleaning filter on the way to the impeller is coarse. The coarse filter is located in the photo above. It's just a kind of plastic frame that is installed at the entrance to the pump, grabbing threads and hair. If too much dirt accumulates, the impeller will score, the motor will rise and begin to buzz. The drain will stop.
The second photo shows the filter hole, usually located in the lower right corner of the front panel of the washing machine. Unscrewed lid. Sometimes you have to remove the decorative panel to get to the place. You see that the shape of the filter hole with a key for proper placement. The upper part is straightened. The base of the threaded filter rotates. As a result of such a move, the downward position of the impeller is precisely covered with a plastic frame.
The water inlet from the tank is located on the right side of the hole, the pump impeller is visible in the second photo. Note that for emergency discharge of water a hose is used, which is plugged with a plug, which goes to the front panel below and to the right of the filter. The second end comes on the pump snail, under the impeller. If it is necessary to drain the water from the washing machine, turn the cap-tube of the hose, pull it out of the body for a short length, remove and collect the liquid in the container.
prefilter A pressure switch and a timer command the discharge of water. The main engine of the washing machine stops regardless of the algorithms embedded inside. Then the impeller of the pump begins to spin. Water - like air in a vacuum cleaner - passes through the center of the impeller and is released to the periphery through the drain hose and down the drain.
The washing machine refuses to drain the water
Consider what can break if the washing machine washes, but does not spin. And most importantly - what to do?
First of all, remember if the drum loading limit has not been exceeded. If you have doubts, remove a couple of things. Does not help? Drain the water by turning off the washing machine from the outlet. There remains a chance that the tank could not be emptied, and the equipment works diligently, without entering the regime. It can be caused by a pump malfunction, or the filter is clogged. Drain the water through the emergency hose as above, into a small basin. The volume, as a rule, does not exceed 5 - 6 liters. Then unscrew the filter and look at the subject of litter. Spread a hefty rag on the floor, drain a glass of water.
If the order with the filter, it is logical to check the pump. Having disconnected the washing machine from the mains, gently rotate the impeller with a pencil. Normally, a little tight, and the blades make about a quarter of a turn in jerks. In the pump there is a short-circuited magnetic rotor, the attempts show that the fields interact with the magnetic core of steel. There is no danger for the equipment in the specified action.
If everything is in order, consider whether an error occurred in the program's task( some programs do not provide for spinning), then start disassembling the case if the washing machine is no longer under warranty service. Disassembly begins from the front panel. Then go to the top cover. To get to the pump, you need to remove the back. The pump is powered by two wires. Usually 220 V, but read the inscriptions on the pump casing. It remains to attach the voltage from the outlet( removing the terminals of the internal wiring) and see if the blades will rotate.
If it does not help, get into the pressostat. This relay with many contacts is sometimes unable to determine that the water in the tank is gone. The reason is unimportant, you need to call all the terminals. To do this, the pressure switch( often hanging above the pump, but closer a little deeper) is undocked. Using an enema, it is necessary to determine the performance of all levels of response. Intensifying the pressure on the pears, count to hearing the clicks of the relay actuation and at the same time call the contacts with a tester.
With a minimum pressure, a group of contacts is determined that acts when the tank is completely empty.
Any electrician will understand. Finally, if nothing helps, you will need to start the working cycle and patiently measure the voltage when the pressure switch is triggered, in addition to fix whether the power comes at the right time to the pump. To do with the security measures taken, with the rear cover removed, to carry out a lot of measurements. Stock up on the layout of the contacts of the pressostat and a table for recording the readings. It is more convenient to observe clicking when you first fill the tank, as the water level rises.
In the case of a programmer-timer, it is usually possible to find a breakdown. Finally, remove it from the washing machine, measure it with a resistance tester of contact groups right at work. Grease, clean the contacts. If the main engine spun before spinning, there is no reason to believe that the cause of failure in it.
washing machine pump. Inside, there is an engine, as simple as a primitive hand blender. This is a pair of coils with a magnetic core, having a cutout under the rotor. It can break either the right winding or the left. It is enough to ring them without removing the pump in order to understand whether there is a fault here. In case of breakage, remove the damaged winding, wind the wire, measure the radius, length, do not forget about the entry and exit points. Then, using skilled hands, create a new spare part.
New pump costs 1000 rubles. Decide whether to spend time because of this amount and repair the washing machine yourself.