Samsung washing machine self-diagnosis system reports breakdowns using special codes. For example, if the sensor that controls the movement of the drum breaks down, in older models, EA, 3C4, 3C3, 3C2, 3C1, 3C, 3E4, 3E3, 3E2, 3E1, 3E appear on the display. A modern Samsung washer has an 8C error code.
Error 8C: description
Starting the program, a washing machine tries to accelerate the drum to the desired speed, but cannot cope. The electric motor stops working and error code 8C or similar symbols with similar decoding appears on the display: 1BC2, 18C2, 1BC1, 18C1, 1 BC, 1 8C, BC2, BC1, 8C2, 8C1, BC, BE2, BE1, BE, 8E2, 8E1, 8E.
They say that there are problems with the MEMS accelerometer. Samsung has a VRT+ vibration sensor that controls revolutions and tridimensional mechanical vibrations. It transmits readings to the PCB and through it controls the motor rotation.
Only new washing machines manufactured after 2013 have such a part. Early models manufactured before 2007 have a standard tachometer. Therefore, 8C error associated with the operation of VRT+ is specific only for modern equipment. But it is decrypted in the same way as the symbols of the 3E, 3C and EA group in older models with a tachometer.
If error code 8C appears due to a failure of self-diagnosis, a reboot should help: just turn off the washing machine for 10 – 15 minutes. If not, look for another source of the problem.
Internal failure of the MEMS sensor
In the Samsung washer, the 8C error code is displayed when the accelerometer is “silent” or gives incorrect/ weak signals to the control module. It can be tested through the DC92-01624A board. VRT+ is connected to the PCB of the display. The PCB-Sub itself has a 6-wire 15P connector. Namely, it is needed for checking the sensor.
- Switch on the washing machine.
- Attach the black multimeter probe to the blue wire at pin 5 and test pins 2, 3, 4, and 6.
- The output voltage should be between 0.5 V and 4.5 V. If it is not correct, then 8C error appears due to VRT+ (assuming that the red wire of pin 1 stably shows 3.3 V DC).
In this case, the vibration sensor must be replaced. It is located at the bottom of the front forecastle. Put the switched off washing machine on the back or sidewall to access it. Remove the drive belt. Unscrew the two screws, remove the problematic part, install a new one (approximate price is from $ 150), fix the mounts firmly.
Error code 8C can be displayed when VRT+ is not connected to the module. Inspect the terminals of the MEMS sensor connector and the P8 CN8 electrical connector. If everything is in order, check the integrity of the wiring that goes to the accelerometer from the main unit. She often breaks off under the screed. An open circuit in the electrical circuit needs to be repaired: clean and tighten weak contacts, solder damaged contacts
Control board failure
If during testing 15P on PCB-Sub the red wire of pin 1 does not show 3.3 V DC, then the electronic controller is the reason. It sends or receives information incorrectly, wherefore 8C error appears. The tracks can be repaired, burnt elements can be replaced. But if the processor breaks down, you will have to install a new PBA DC92-01021V printed-wiring board. It costs from $ 170.
Problems with the motor and its elements
Sometimes 8C error code occurs in Samsung washer immediately after filling with water, and the drum does not rotate on all programs. This indicates the breaking of the motor winding. It should be completely replaced.
If the equipment fails to gain speed at the beginning of spinning, check the motor brushes. They can create an inhomogeneous magnetic field, wherefore the MEMS sensor does not start the centrifuge. It is also possible that the stretched and worn drive belt is the reason – when it slips, the drum moves jerkily, and the system gives error code 8C. All worn elements must be replaced.
The weak connection between the accelerometer and the electric motor
VRT+ is fixed to the motor case with fasteners that can untwist. In this case, in the washing mode, the drum does not rotate correctly and stops during the spin cycle. Check and tighten the mounts.
Sometimes the connection is lost due to oxidation/polluting of the motor shaft or magnetic ring. As a result, the vibration sensor gives false signals, the control acts only at low speeds. Spinning programs do not start – error 8C appears on the display. Clearing of parts is required.