Product Features. Schedule timer: uses a timer to schedule heating and cooling setpoints throughout the day; up to 5 setpoints can be programmed per day; the selected setpoints will be automatically activated at the scheduled time. Home leave operation maintains the indoor temperature at your specified comfort level during absence, thus saving energy. Integrates basic control of HRV units (ON/OFF, fan speed). 24/7 monitoring of the system for malfunctions in a total of 80 components. Immediate display of fault location and condition.