The Saeco Poemia is a manual espresso machine. It is a simple design as it does not contain a microcontroller and is similar to other manual espresso maker designs.

Seattle Coffee gear has a service manual for this model with a useful parts diagram, but it does not include a schematic wiring diagram. There are several useful Saeco Poemia repair videos on YouTube by Milen Stoitsev:

https://youtu.be/mdtPvpPp86c

Saeco safety thermostats

Saeco Poemia leak boiler repair