Service code Washing machine Indesit Wib111

Hi Jayeff, thank you for your help and yes, it it correct. I reseted washer by holding the Start button operated for aprox.5-7s.

I have tried your advice as you described and it does not work. After 30s i released the button. Then i reconnected the power to the machine. The lock locked by itself, then i pressed On/OFF, then Start. Valve opened for a 2seconds, then closed. 20min past, pump started, error code same.

Version of my model is 46464700100.

thank you

@petr3946

Been trying to find a service manual or wiring diagram for the machine but no luck.

I realize that you said that the door dock was working but was wondering if the control board didn't get a signal indicating that the lock was closed.

Bit hard without the wiring diagram but on other washer makes there's either a separate switch in the lock mechanism that operates when the lock has latched that signals the control board that the lock is closed or the control board senses the change in the value of current flowing though the lock operate coil when the lock has latched securely. Usually a switch around the coil.

Since the machine was operating when the power failure occurred most likely the problem is in the control board.

Are there any visibly obvious components damaged on the control board I know you've replaced the capacitors and the motor triac is OK but it could be another component that is the problem.

There are no burnt components on the board. I replaced the triac, electrolytic capacitors, and ULN2003. The door lock has 3 terminals: L1, N, and when the lock is engaged, L2 which goes further to the control unit. The processor receives a signal that the lock is locked, along with some peripheral power supplies. There is no coil there...

The problem is that the processor sends a signal to transistor Q015, which opens the lock/motor triac as soon as I plug the washing machine into the mains. It shouldn't do that. The higher voltage from the processor (pin 30) is 3.3V and lasts only 2 seconds. Then it drops to 2.7V. The higher 3.3V also appears when I press ON/OFF, or RESET (long press of START).

I tried grounding this voltage with a 1kΩ resistor between B and E, so that the lock wouldn't engage when plugging the machine into the mains (the transistor wouldn't have sufficient voltage).

During the Spin (fast spin) program, after plugging the machine in, the lock doesn't engage on its own — I press ON, START, close the door, the lock engages and the motor immediately starts a very fast spin (max RPM) for 2 seconds, then the speed gradually drops to the normal speed of the Fast Spin program (which is slower than the maximum). When I select the Wash program, it starts filling with water, then the motor spins up fast and again the speed drops to slow, as if the laundry is tumbling and soaking in the drum. And occasionally it spins up to max again.

So the machine is capable of running a proper program. Apparently the memory is not corrupted. But something is telling the unit to send a signal to the transistor base already when the machine is powered on. The 12V and 3.3V supplies are very stable even under load.

i have attached the schematic above.