Samsung r290 8kw built in pump

Sorry @VIERICIU_COSMIN I can’t help you there (I don’t use PWM myself).

All I have is this diagram, which I assume is what you are using.

Are your pump signal cables not colour coded per the diagram?

If you are stuck, you can try emailing the Samsung UK Helpline at [email protected].

No, is a WITA pump which has other color, Red, Black, Yellow.

I also had issues with PWM on my Samsung. The thread (including resolution) is here:

Yeah, i saw that but hopefully it’s not the PCB in my case. I’ll try tomorrow with another pump, finger crossed. So just to be 100% sure , it’s ground on top, and signal bottom