How do you prime the siena? - Schaerer Siena Espresso Machine

Schaerer Siena machines can become airlocked from time to time leaving the pump running yet sounding rough. Easiest way of remedying this is by running the hot water (either by pressing the jug button or turning the hot water knob on the side depending on which model you've got) option through the silver wand. Once you get a strong water flow through this then the machine pump has been primed and you can then begin making coffee as normal. You'll notice the sound the pump makes will change as the water comes through.
Good luck!