I had to borrow the Nest thermostat from one of my units for another one where it was more needed, while a replacement is on the way. The unit from which I borrowed is combined HVAC (heat+cool) with an electric furnace/handler and heat pump outside. Here is how it was wired before I took the Nest out:
As you can see, there is only one of the R wires and it goes into Rh.
While I am waiting for a replacement, I would like to have AC accessible by hardwiring the adequate wires and turn it on and off using the handler's breaker on the main panel. I thought I would just hardwire
R (power) Y (compressor) G (fan)
which worked but started blowing warm air, no AC. The equipment worked fine until I removed the thermostat. In fact, that is exactly how I had it hardwired in my other property where the system does cooling only (heat coming from a radiator hydronic system). Do I need to wire differently here in order to get cool air because this system is combined, unlike in the other unit?