Nest Learning Thermostat Wiring - 7 wires with previous thermostat

[christopherreed]

 

I am having trouble connecting a nest thermostat that has an R, W2, W1, Y, G, O, & B wires connected to the old thermostat. I have a heat pump for heating and forced air for cooling.  Learning thermostat has a dual O/B port.  Is my wiring compatable?  Above image is old thermostat wiring setup.

[Rccellini]

Also wondering this 

[narosenberg]

I have the same question.  Our system requires separate O and B lines from the thermostat to tell it whether to be in cool or heat mode.  I'm tempted to connect the W (heat) and Y(cool) wires to the B (heat) and O (cool) to do the job.  Not rushing on this one, but if someone out there has any ideas...

[christopherreed]

I managed to get my thermostat configured properly this morning.  It turned out the problem I had was the O/B setting on the thermostat was set to B and when Ichanged it to O, the hot air in cooling switched to cold air and my room cooled.  I hope this tip and my final wiring configuration up above helps.

[Rccellini]

Unfortunately I have this nest so mine is different.. 

 

[christopherreed]

https://youtu.be/6qwFra15pdY 

This video really helped me troubleshoot my issue.