alarm

Here's the link to contact your local Atom distributor for tech support

http://www.atom-ami.co.jp/english/company/agency.html

or you can try contacting them directly

postmaster@atom-ami.co.jp

This problem refers to air in line sensor or main board problem. First you should replace air in line sensor and do a calibration procedure. If air in line alarm does not remove, you should replace main board. But if you do not want to replace main board you will have to repair main board. You should replace u5,u19, u3 .

Response provided by Mohammed R., service engineer at raymandrad, via LinkedIN