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| Flow | Description |
|---|---|
| 1 | Water flows from pump to boiler |
| 2 | From boiler to valve assembly |
| 3 | Default flow for water/steam |
| 4 | To group head |
| 5 | From valve assembly to drain |
| 6 | Pump safety valve to drain |
| 7 | Steam/water to drain |
| 8 | To hot water exit |
| 9 | From head to pressure gauge |
Solenoid Valve Assembly
| Part | Description | Manufacturer Info |
|---|---|---|
CEME v397vn25pr44 series 5C | 3-way solenoid | http://www.cemegroup.com/solenoid-valves/v397-199 |
| CEME v799vn15pr44 series 5C | 2-way solenoid | http://www.cemegroup.com/solenoid-valves/v799-211 |
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Parts
| Part Number | Description | URL |
|---|---|---|
| SP0001474 | Group Head Steam Ring (54mm) | https://www.ereplacementparts.com/shower-head-steam-ring-p-629904.html |
| SP0010236 | Main PCB | https://www.ereplacementparts.com/main-pcb-p-1790467.html |
| SP0020444 | Solenoid Valve Assembly | https://www.ereplacementparts.com/solenoid-valve-assembly-p-629955.html |
Troubleshooting
No Water Getting to Group Head
Observations:
- no water is coming out the group head (no espresso)
- water IS being dispensed from the steam wand and hot water outlet.
- no pressure when trying dispensing a shot
- no water when trying to dispense a shot
- 3-way solenoid valve had melted
- something had blown on the PCB
Testing:
- blew through hoses to determine if a clog exists. (All good)
- descaled machine using citric acid and water
- backflow from portafilter did nothing (no water)
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- replace solenoid valve assembly (DONE)
- replace PCB (waiting on part)
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