A breakdown of the main electronic module of the SMA is a serious matter. With such a malfunction, the washing machine may not turn on at all, or it may start but carry out programs with errors. For example, do not spin, wash in cold water, etc. Such failures make it impossible to use the machine.
In this case, it is impossible to do without repairing the control unit. Let's tell you why the module of a Samsung automatic machine may fail. Let's see if you can fix the controller yourself.
Why does the control unit break down?
Samsung washing machines are highly reliable. The brand produces equipment that meets European quality standards, so the machines usually do not require repairs for many years of operation. However, there is still a small percentage of breakdowns.
The main electronic unit of a Samsung washing machine can break down due to various factors. Let's look at the main reasons for this problem.
Manufacturing defects. Its percentage is minimal, but still this factor takes place. It can be determined visually - the board will have poorly soldered contacts, peeled tracks, areas of solder spreading, etc. Usually the problem manifests itself during the first month of using the washing machine. In this case, you should contact the service center; the breakdown is included in the warranty list, so it will be fixed free of charge.
Electricity problems. The electronics of modern washing machines are very sensitive to voltage changes in the network. A strong “jump” can cause the control unit to fail.
Liquid has gotten on the board.Under no circumstances should the module come into contact with water. Otherwise, this will lead to oxidation of contacts and tracks. Sometimes the user exceeds the dosage of detergent and the “soap cap” extends beyond the tank, seeping into the electronics. The microcontroller shorts out and stops functioning. Often in such a situation it is enough to dry the control unit well.
Water can get on the control board when transporting the automatic machine, so you need to transport the washing machine “standing”, securely fixing it in a vertical position.
Mice or rats, which like to gnaw contacts, can also disrupt the operation of the control unit of a Samsung washing machine. Cockroaches that get inside the machine can cause a malfunction. Let's figure out how you can check whether the electronic module is really functioning incorrectly.
Let's make sure the block is broken
How to understand that the problem is really in the microcontroller? The “symptoms” of this problem may vary. You can think about the need to repair the control unit if the following symptoms are observed:
the washing machine draws water into the tank and immediately drains it;
the machine does not turn on, and a fault code appears on the display;
all indicators on the dashboard are lit or flashing;
washing programs are performed incorrectly, with significant violations (the cycle duration increases, the water does not heat up to the required degree, etc.);
The drum rotates unpredictably - sometimes quickly, sometimes very slowly.
If the equipment simply freezes during program execution, then it is also likely that the problem is in the control module. Self-diagnosis system for washing machines Samsung will help identify the cause of equipment failure. Information on how to activate test mode is provided in the instructions.
You can inspect the control board yourself, at home. To do this, the electronic unit will have to be removed. This is done as follows:
de-energize the SMA;
turn the shut-off valve to shut off the water supply to the washing machine;
unscrew the two bolts holding the top cover of the case, remove it and put it aside;
remove the powder receptacle from the machine;
remove the screws around the perimeter of the control panel;
remove the “tidy” by disconnecting the wire contacts;
Unfasten the latch and open the module cover.
Be sure to take a photo of the terminal connection diagram - this will help you avoid making mistakes when reassembling the SMA.
Next, the block is inspected for carbon deposits, damage to contacts, tracks, and the presence of oxidized areas. Even one semiconductor can burn out - and this will already provoke equipment malfunctions. What to do if such defects are identified?
Is it possible to fix the block yourself?
Removing the electronic module on Samsung washing machines is quite simple. On machines of other brands, the progress of work will be similar. The main difficulties begin later - to directly repair the control unit you need certain knowledge and tools.
If you have never worked with electronics and do not understand what traces or semiconductors are, it is better not to risk repairing the washing machine yourself. You should entrust the work to specialists when:
it is noticeable that some areas of the control board have changed color (these may be dark spots or scorch marks);
capacitors have changed shape (their caps may become convex);
the varnish coating on the magnetic coils has faded;
the area where the main processor is located has darkened;
changed the color of the microcircuit pin.
In these cases, soldering of the board and replacement of some semiconductor elements will be required. It is advisable to entrust such repairs to specialists. Otherwise, you can damage the machine even more.
A breakdown of the main electronic module of the SMA is a serious matter. With such a malfunction, the washing machine may not turn on at all, or it may start but carry out programs with errors. For example, do not spin, wash in cold water, etc. Such failures make it impossible to use the machine.
Add a comment