Apologies as this question may be a bit off topic:
Unlike the 4-wire setups that use Y for cooling, my system uses Y for the heat pump compressor and the additional O/B wire to move the reversing valve to cooling when it is energized.
Since the relays only have 4 positions I need to short the compressor wire (Y) to cooling (O/B) when I want cooling and manually move Y to heating (W) when I need heat.
I feel that jumping Y to both and using something like an inline diode would solve my issue but didn’t know if there was a more elegant solution?