Cleaned up low voltage wiring and located orange wire off blower control module tied in with the reversing valve O bundle though the module uses O for W2. On second arrival found orange wire from motor control module meant as w2 but wired in with O. Rewired then started system. System operational upon departure with no further issues
Performed a diagnostic service call for a 10 year old heat pump. This is an older carrier heat pump communicating system. Stat and module not communicating properly. Got customer cooling but will need to return with service manager to further diagnose.