Luxaire HPO12030 with ACR030 indoor-system operates on cooling-will not operate on a call for heating-outdoor will not operate on heating-emergency heat works only.

Jumper R & Y low voltage at Air Handler on a call for heat- outdoor unit fails to operate.

Some heat pumps lock out if temperature is below 30*. Can't find anything with that model number on the net.

Yes- but this one doesn't lock out.Its a 12 seer same as eabc 030-with new indoor ACR O3O- I do feel it's the indoor circuit board-outdoor has been replaced.