Hi,

I have a Daikin VRV RXYQ8MW1B that is tripping its main mcb intermittantly. The inverter compressor has the usual red, white and black wires going onto the U,V,W terminals but also has a brown wire going onto an N terminal.
I found a post on an old closed thread on here that identifies this wire as not a neutral but a feedback to the inverter so that the pcb knows the rotor position. I called Daikin help and the guy I spoke to said this is correct but didn't have any more info on this. My questions are how exactly does this work? What fault/s could this feedback wire show if something's wrong with the compressor? Should there be no continuity from this N terminal to U,V,W? (I'm assuming so) and why has this particular series got this feedback to the pcb when all other previous and models don't?
I'm pretty sure this is not causing this particular issue but I've never seen this on an inverter before and it's bugging me!

Cheers,

Markie.