MitsuRunner-adapter also known as puu-adapter, because “puu” lampopumput.info forum builds these. With the adapter you can connect MitsuRunner to Mitsbishi Electric heat pump (at least LN models) without cutting any wires.

Wiring to the relay:

• 1 (white or yellow) - COM
• 2 (black) - NC
• 3 (red) - NO

Parts:

• Female connector housing: https://www.te.com/usa-en/product-2-1747066-4.html
• Male connector housing: https://www.te.com/usa-en/product-2-1747067-4.html
• Socket contacts: https://www.te.com/usa-en/product-1747062-1.html
  • Option B: https://www.te.com/usa-en/product-1747591-1.html
  • Option C: https://www.te.com/usa-en/product-1747063-1.html

You can order ready made adapter from admin(at)mitsurunner(dot)com. They are made in Finland, but shipping to other EU countries is possible.