I just hooked up this dual run unit, and am not getting any lights on the outdoor unit. I checked the usual ( fuses, breakers, current), all looked fine, I depressed the "learn button" then tried hitting the "test" button and still nothing. Ive got an old school single stage thermostat hooked to the y1 termanal. I didn't think that would matter with running the test function, but since the contractors are built in the circuit board I'm double guessing myself. Also I noticed that I had no current going to the high and low pressure switch. I just don't know enough about this system to trouble shoot it acurately. Thanks guys