Washing machine malfunction
The washing machine is an excellent assistant in the family and provides not only clean clothes, but the availability of free time. When it breaks, the search begins for specialists who could fix it. It can drag on for a week and then all the family members feel the whole charm of using the washing machine. This home appliance consists of parts that change quickly and easily. Having shown patience, attentiveness, using the data of this article, you can independently determine the damage in the device and even fix it. Consider the causes and methods of repairing the malfunction code-named F 08.Algorithm for mechanical and electromechanical devices. Machines equipped with electronic control card will give an error at the beginning of washing, after operation of the suction pump. Since at this time, the electronic module checks the main electrical components: a tubular electric heater (TEN), a water level pressostat, an electric water valve, etc. In mechanical assemblies (machines manufactured before 2000), this failure manifests itself in the form of a cold water in the washing process.Step # 3. On the control board, determine where the relay is installed. It is easy to find through the wires connected to the heater. The relay consists of a control (electromagnet) and power unit (powerful moving contacts). To detect breakage, it is necessary to check the resistance of the inductor, which is in the range of 175 - 190 ohms and the condition of the contacts. The relay must be replaced if: 1. Electromagnet has a short or open circuit. 2. Contact during the circuit does not conduct electric current (oxidation, charring of working surfaces). 3. Contacts are always in the closed position (sticking). If one of the above types of breakdowns is detected, the relay must be replaced. Sequence of relay replacement: - using a soldering iron or an electric soldering dryer, disconnect it from the circuit board; - free the mounting holes from the tin; - onto the board, install a new relay; - Using flux and tin, solder the contacts securely to the tracks. [/L_REPEAT]
Signs of damage.Many manufacturers, in the intellectual part of the washing machine, have the same error codes. If you find on the displays, at start-up, the inscription F 08 (for electronic devices), or the following indicators are constantly lit: “Speed”, “Quick wash” (for electromechanical devices), thenthe technology is faulty and its further operation is impossible.
Causes of failure.Error F 08 occurs due to damage: - electric heater (in 80% of cases); - water temperature sensor (in 8% of cases); - heater control relay (in 12% of cases). Heater and sensor to break down the temperature if: 1. They are made of low-quality materials. 2. It has local overheating due to the formation of a nonmetallic layer on the working surface (scale, foreign objects). 3.Voltages greater than 240 volts are applied. The control relay may be damaged if the device is connected to an unstable network (when the voltage is constantly changing from 160 to 260 volts). When this occurs, the electrical connection between the mains supply and the heater is disturbed due to the charring of the power closing contacts, and since the relay is enclosed in an opaque case, it is impossible to detect a breakdown visually. Troubleshooting the node. Damage to electronic components will be needed: a measuring device with an ohmmeter function and semiconductor testing. Step # 1. Since, in most cases, the heater breaks down in a typewriter, it means must be inspected first. The heater is located at the bottom of the tank, from the front or back of the machine. After its detection, disconnect the zero and phase wires from the contact group. Connect a multimeter in Ohmmeter mode to them. If the readings are: - 0 - there is a short in the heater circuit, between the case and the heating wire, - 1 - there is an open circuit in the heater circuit; - 25 - 30 Ohm - TEN is in good condition.To study the relationship between the contacts of the heater and its metallic tubular sheath,the tester switches to diode test mode. One probe is alternately connected to the electrical terminals of the heating element, the other to its body. When the metal sheath and the helix are closed, the tester will start to make sounds (squeak) and show resistance of 0 ohm. If a breakdown is detected in the heater, it must be replaced with a working one. To remove the heater from the washing machine: unscrew the nut of the clamping plate bolt so that the nut covers the beginning of the bolt thread. It is located near the temperature sensor. Hit the nut with a hammer, before moving it to the heater thrust plate. Holding his contact with pliers, applying vertical and horizontal forces, pull out the worn out part. Clean the TENA seat from the outside, inside the drum of dirt and scale. Disassemble and mount the temperature sensor from the removed electric heater to the mounted heater. On it, as far as possible, move the clip from the stubborn. In this case, the nut must be on the end of the bolt. Getting into the clamps for the heater, which are located inside the hermetic drum (this fixture of the heater is used only in old-fashioned machines), install the heater before touching the stop plate in the case. Tighten the nut until the heater locks securely in the seat.Connect electrical wires to the mounted assembly. Assemble and test equipment operation. Step # 2. The water temperature sensor is integrated in the stop bar and the rubber seal. Under the influence of temperature, it changes its resistance. To check it: 1. With the contact group, disconnect the connector. 2. Use a tester to determine the resistance of the part. The readings of a working sensor with an increase in the ambient temperature will change in a smaller direction. At a temperature of 20 degrees Celsius, depending on the sensor model, the resistance is in the range of 5 - 6 kΩ, at 50 C0 - 1300 - 1400 Ohm. If the measuring device shows 0 or 1, then the sensor must be replaced with a working one. To do this: - unscrew the clamping bolt nut before it starts; - hit the nut before moving it to the interposer; - remove the damaged sensor; - into the vacant seat, install good sensor; - tighten the nut until the heater is firmly fixed; - connect the plug with the wires.
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