Tigaz52

Hello, I own a therma v monoblock 12kw 1-ph from 2015. It is running directly to underfloor heating with three indoor thermostats. The thermostats are wired so at any case one of them is open. Since now everything seems normal except sometimes a ch14 error code. But I have managed to remove it by opening the filter. (The filter was clean). Yesterday the ch14 appeared again. I've tried cleaning the filter, bypass the underfloor heating, knock the flow sensor but the error still come back. Please for any suggestions. Also I would appreciate the service manual for the model. Thanks in advance

Hello, I'm mechanical engineer working in commercial building planning and construction. Besides that I'm closely cooperating with the welding industry. I like designing and manufacturing what ever I can in my life but the fault finding and repair process is my first love. See you on the garage