Upon arrival unit was off. Turned unit on and both air handler and condenser turned on. Hooked up temp sensors and saw that the return was 89 and the supply was 115. Checked the heating pipes at the hydro coil and found that hot water was flowing to the coil so the heat and the ac were running simultaneously. Upon further investigation found the zone valve for that air handler had failed in the open position and the boiler was pumping hot water to that coil. Disconnected wires for the zone valve and had no more water flowing to that hydro coil. Need to replace the zone valve before the heating season. Unit is working properly. Had 129/365 for pressure and had 10 subcooling which is within manufacturers specs.