if the boiler is "full" when you turn it on, the pump may not run.
the pump will run a bit if it needs to fill the boiler when you 1st turn it on.
question for you, what sort of pump does it have ?
a rotary (procon / fluidtech) or a vibe pump.
lift the lid off yours and have a look
google coffee vibe pump or coffee rotary pump for pictures if you dont know.
both pumps can run of a "tank", rotary pumps are not really designed to and you need to take a few precautions to ensure the pump does not run dry but they can run off a tank
vibe are pretty happy to run on tank....
looking at the machine whats in the ""back" under that stainless steel lid? where the hole is?
i have *Faema e98 and it has both a tank and mains inlet, i thought your might have a tank in there (or space)
nice looking machine, it should make great coffee :) and welcome to cs
ps you might need a new group head seal looking at the angle of your group handle