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Delonghi ECAM 23.120 Blinking Steam Button Issue

Introduzione

Delonghi 23.120 coffee machine shows the following symptoms:

  • Not making any water pumping at boot
  • Blinking steam button LED
  • Impossible to perform any action, steam or coffee

This guide shows how to check all the elements from the coffee machine to isolate the firmware issue, and how to fix the firmware issue itself.

Cosa ti serve

  1. Delonghi ECAM 23.120 Blinking Steam Button Issue, Boot the machine in test mode: passo 1, immagine 1 di 2 Delonghi ECAM 23.120 Blinking Steam Button Issue, Boot the machine in test mode: passo 1, immagine 2 di 2

    • Put steam tap on 0

    • Plug the machine

    • Press and hold buttons "1 short coffee" and "steam" simultaneously

    • Switch the On/Off button on the back to 1

    • Release "1 coffee" and "steam" once the motor starts moving

    • See the ECAM23420 service manual ECAM23.420 service manual for details. This model is very similar to the 23.120.

    Traduci

  2. Delonghi ECAM 23.120 Blinking Steam Button Issue, Prepare for testing: passo 2, immagine 1 di 1

    • Add water in the tank

    • Empty the water collection tray

    • Open the side panel to be able to see the infuser and its endless screw

    • See Step 1 from brewing group tutorial

    Traduci

  3. Delonghi ECAM 23.120 Blinking Steam Button Issue, Test the elements: passo 3, immagine 1 di 1

    • Press the "1 long coffee" button

    • It should move the infuser part up to the max, then down

    • Press the "water drop" button

    • It should turn the grinder on

    • Press the "steam" button

    • It should turn on the water pump

    • Press the "P" button

    • It should heat up some water

    Traduci

  4. Delonghi ECAM 23.120 Blinking Steam Button Issue, Remove the PCB from the casing: passo 4, immagine 1 di 2 Delonghi ECAM 23.120 Blinking Steam Button Issue, Remove the PCB from the casing: passo 4, immagine 2 di 2

    • Every element separately works, the issue is probably due to corrupt software

    • In order to reflash the software, first unmount the PCB from the machine

    • Follow step 1 to 6 from here: DeLonghi ECAM Series Leistungsplatine reparieren

    • If you need it, you can buy spare boards from the Internet, but then you will need to reflash the right firmware for your model

    Traduci

  6. Delonghi ECAM 23.120 Blinking Steam Button Issue, Spot debugger pads: passo 5, immagine 1 di 1

    • The main microcontroller is a PIC18LF2520

    • It can be programmed via the pads at the side of the board

    • Numbered from 1 to 7

    • (1) nMCLR, (2) PGC, (3) PGD, (4) VDD 5V, (7) VSS GND

    Traduci

  7. Delonghi ECAM 23.120 Blinking Steam Button Issue, Borrow or buy a programmer: passo 6, immagine 1 di 1

    • You need a programmer for Microchip PIC-8 series

    • Several models are available: PICKit, ICE, ICD, Snap

    • This tutorial will feature a borrowed ICD, but if you need to buy one the Snap is a cheaper option

    Traduci

  8. Delonghi ECAM 23.120 Blinking Steam Button Issue, Connect board to programmer: passo 7, immagine 1 di 3 Delonghi ECAM 23.120 Blinking Steam Button Issue, Connect board to programmer: passo 7, immagine 2 di 3 Delonghi ECAM 23.120 Blinking Steam Button Issue, Connect board to programmer: passo 7, immagine 3 di 3

    • Solder a 7-pin 2.54mm header to the pads

    • Use jumper wires to connect to the programmer

    Traduci

  9. Delonghi ECAM 23.120 Blinking Steam Button Issue, Add an external 5V power supply: passo 8, immagine 1 di 1

    • If the programmer does not support it, connect an external 5V power supply to the microcontroller

    • Theoretically, you could plug the mains connector, but you would have unprotected live high voltage, so please don’t do that

    • An easy hack consists in using a USB connector: the red cable is 5V and the black is GND

    • Solder USB power lines to the pads (7) GND and (4) VDD

    • Plug in the USB connector to a main power adapter or a computer

    Traduci

    • Download and install the MPLab X software from Microchip website

    • Find a program hex file

    • Program for ECAM 23.120 SW2 can be downloaded from here

    • Other models can be found on this forum

    • It is also possible to copy the firmware from another coffee machine from the same model

    • It seems like several models use the same physical board, but the firmware flashed on it is different

    Traduci

  11. Delonghi ECAM 23.120 Blinking Steam Button Issue, Read and save the current firmware: passo 10, immagine 1 di 1

    • Create a new project with "New project -> Prebuilt Project"

    • Select the firmware hex file

    • Select the PIC18LF2520 in the 8-bit PIC section

    • Go to "Window -> Target Memory View -> Program Memory" and click the "Read Device Memory" button. Verify it reads some bytes.

    • In the top menu, find the "Read Device Memory" button, click its drop-down arrow and select "Read Device Memory To File"

    Traduci

  12. Delonghi ECAM 23.120 Blinking Steam Button Issue, Reprogram!: passo 11, immagine 1 di 1

    • Click "Program Device for Production main Project" to flash the new program

    Traduci

    • Test the board before starting re-assembling

    • Desolder the header connector pins

    • Re-assemble the machine

    Traduci
Conclusione

To reassemble your device, follow these instructions in reverse order.

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Membro da: 02/28/22

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