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[Solved] DeLonghi ECAM 28465MB coffee machine - message: attach water nozzle

Nykiel 22182 2
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 19143593
    Nykiel
    Level 11  
    After replacing the damaged pump, the buzzer started beeping to indicate that the milk container was being filled, even though nothing was happening. After a dozen or so minutes it calmed down and we could make coffee. The problem became apparent when it was necessary to descale. It keeps asking for the water nozzle to be put on, even though it is put on and you can hear the beeping of the buzzer confirming this fact.

    By the way, I noticed that when I put the milk container in, I don`t hear the buzzer, but it makes milk coffee. The switches on the frothing nozzle have been checked together with the cables to the module and they do not show any faults and are working properly.

    While looking for a way to repair it, I reset it to the initial values and now, after setting the language, it keeps asking for the water nozzle to be installed, not allowing any function to be performed. I am asking experts for advice on whether there is anything else to check, whether the module needs to be replaced or repaired. I repair TVs, electronics and small household appliances, and the coffee machine is my property and due to my business, I would like to repair it myself.
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  • #3 19145381
    Nykiel
    Level 11  
    As I noted in the previous post, the switches located at the frothing nozzle have been checked. I am currently checking the control module. Pulses from the switches reach the processor through resistors. There remains a damaged module (processor), although I find it hard to believe, or something is mixed up in the memory. Maybe a secret electronics reset. The module is clean and free of any corrosion. What makes me wonder is that the damage coincided with the pump replacement. When replacing the pump, there is no possibility of short circuits, reverse connection, etc....

    Edit:
    Bingo two evenings and problem solved. Damaged electronics module. After careful measurements, it was found SMD capacitor however, there is no numbering on the print, located behind the resistor ladder RR3=10kΩ . It experienced leakage and began to behave like a resistor of approximately 475Ω. It was located in the track of the upper switch from the milk container. At this moment, you can hear the buzzer beeping when inserting the milk container. If someone knows electronics, maybe my topic will solve a similar problem one day, without having to spend over PLN 225 for the module. I think I earned points back for the diagnosis. Regards
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