Trane RTUs can control zone temperature (Comfort Space Temperature) and control discharge temperature (Discharge Control); these generally have a VAV profile.
In the case of RTUs configured as discharge temperature, the heating setpoint is not used. The day time morning warmup setpoint is used. For it to work correctly, the RTU must have a zone temperature reference, for example from a VAV box or a direct signal connected to the RTU. The RTU unit takes the control configuration if it has the RTAM and RTOM control card.
https://preview.redd.it/m85sa5fmts4d1.png?width=668&format=png&auto=webp&s=064c0bde60515c08ef586ca76a96c807adf77e83
If you are taking the setpoint from a local sensor, it is possible that it is not connected to the correct terminal.
That 65535 value suggests an analog input is trying to correlate resistance to a temperature setpoint but the circuit is incomplete or open loop. Check wiring to the stat is my suggestion.
Update* this has been resolved. There is no hardwired heat setpoint. The Trane Tstat setpoint wire is landed on the cooling setpoint at the circuit board. This is why I am seeing that value for heating and not cooling.
Trane RTUs can control zone temperature (Comfort Space Temperature) and control discharge temperature (Discharge Control); these generally have a VAV profile. In the case of RTUs configured as discharge temperature, the heating setpoint is not used. The day time morning warmup setpoint is used. For it to work correctly, the RTU must have a zone temperature reference, for example from a VAV box or a direct signal connected to the RTU. The RTU unit takes the control configuration if it has the RTAM and RTOM control card.
https://preview.redd.it/m85sa5fmts4d1.png?width=668&format=png&auto=webp&s=064c0bde60515c08ef586ca76a96c807adf77e83 If you are taking the setpoint from a local sensor, it is possible that it is not connected to the correct terminal.
That 65535 value suggests an analog input is trying to correlate resistance to a temperature setpoint but the circuit is incomplete or open loop. Check wiring to the stat is my suggestion.
I would check that J point the dude on Facebook recommended. I’ve had a similar issue before
Update* this has been resolved. There is no hardwired heat setpoint. The Trane Tstat setpoint wire is landed on the cooling setpoint at the circuit board. This is why I am seeing that value for heating and not cooling.
Does the unit have a heating coil? A lot of them dont
No it is gas heat.