How to mend Ariston Genus

I have an Ariston Genus boiler. Fault showing 30 40 50, I can't find manual?

ariston e combi evo?

No display on Ariston e-combi approx3yrs old?

eurocombi?

Ariston microgenus 23 sounds like a jumbo jet!?

ariston boiler?

Why is my ariston microgenus 23 combi boiler producing hot water downstairs?

I have an Ariston Clas He system with an error code of 1P2?

Arriston combi boiler hot water scalding temp light comes on?

error code e02 wont work when pressurised?

Ariston Microgenus 23 MFFI PCB Defect?

ariston microgenus 23 chimney led on?

boiler stopped working?

Why is the pressure on my Ariston boiler rising to nearly 4 Bar?

Please could anyone tel me why my boiler constantly shows err 501. I reset?

What is the problem?

boiler keeps going out?

Boiler fault Ariston Dia 20 mffi ce type c?

Ariston microgenus 27 mffi problem?

Heating? Ariston micro genus 27 mffi?

gas boiler keeps going to reset?

ariston genus he shows error A06?

Error light blinking (orange colour) on Ariston e-combi boiler?

E 34 on ariston boiler microgenus 24?

Why does my boiler remain ON - even when switch is moved to OFF?

ariston boiler slow to ignite?

Ariston Error Code E02 now A77?

I have error code 108 on my Ariston Combi boiler what do I do to fix it?

Replace PCb on 30he?

how to fix a err 103?