Ductless Indoor Programmable Controller

Lennox Commercial Controller 3


  • Programmable daily schedule with up to 8-actions per day
  • Copy/paste function for easy schedule programming
  • Schedule start time, mode, setpoint, and fan speed
  • Compatible with all mini-split indoor units
  • Optional accessory that is purchased separately
  • °F or °C field selectable – default °F
  • Simple, user-friendly design with large backlit LED display for easy visibility
  • Additional hardware is furnished for installation
  • Communication cabling: factory 4-wire harness
  • Setpoint range: 62°F - 86°F
  • Operating temperature range: 23°F - 110°F
  • Operating humidity range (RH): 40% - 90%


  • Built-in system diagnostics
  • Child lock function to lock all controller buttons
  • Audible tone when a button is pressed (can be disabled)
  • POWER button – turn system on and off
  • MODE button – Auto/Cool/Dry/Heat/Fan
  • FAN SPEED button – Auto/Low/Med/High
  • PLUS (+) and MINUS (-) buttons - adjust setpoint, select days of the week when setting a schedule, and select mode of operation
  • TIMER ON / TIMER OFF buttons - set current time of day, setup weekly schedules or timed operation, start/stop timed operation
  • UP-DOWN buttons – increase or decrease indoor temperature
  • SWING button - start or stop horizontal louver auto swing feature, control swing oscillation and louver angle in 6° increments
  • DAY OFF/DEL button - disable specific days/schedules of the week or delete a specific event
  • CONFIRM button – confirm each step when managing schedules
  • BACK button - allows navigation through the control screens
  • TURBO button - set indoor fan speed on high for a factory-set time period to reach a preset temperature in the shortest time
  • COPY button – easily copy a schedule to a new day
  • FOLLOW ME – toggle between room temperature sensing from the indoor unit or the controller