I am having some major wiring issues with this honeywell thermostat rth7400d. It is designed for heat pump usage, but I'm not sure if it is compatable with my Rheem hvac system.

My system consists of an (outdoor unit): Rheem 10 seer series classic heat pump <model# rpka-031jaz>, and an (indoor unit): Rheem single phase air handler <model# rbeh-17511sfaa>.

The wiring configuration of the previously used thermostat is non-existant.

I have verified wiring from the thermostat to the handler and handler to the heat pump as follows: (Let "is wired to" be represented by the "=" sign)

1) at thermostat terminals:
*Br = C
*G = G
*Y = Y
*Bl = O/B
*R = R + R/C
________________________________________

2) from thermostat to handler:
*G = GBk
*W = WBk + WG

3) from thermostat to heat pump:
*Y = Y
*Bl = Bl

4) from thermostat to heat pump and handler:
*Br = Br + Br
*R = R + R

5) from handler to heat pump:
*Pr = O = Pr
_________________________________________

6) at heat pump terminals:
*Br = Br
*Y = Y
Bl = Bl
R = R
O = Pr

When the heat is turned on, the handler provides the heat via heating elements. I'm assuming that this is considered the emergency heat (EH). I can feel the side of the handler heat up next to the heating elements. I am told that this system is supposed to primarily run off of the auxillry heat. Either way the heat pump (fan/compressor) does not turn on at all during a heating command by the thermostat. What is wired incorrectly?

In the summer time the A/C worked just fine aside from needing a recharge of coolant.

What do you think the problem could be?

I somewhat followed the schematics for the units but cannot fully understand the situation without a schematic of the thermostat