8905XF Fresh Air Controller
Key Specifications
· Fresh air system controller (ventilation)
· Display temperature when switch off
· Linkage function available
· IR remote control (optional)
· 86×86×38mm · 170g
Why Choose 8905XF
· Temperature Display When Off – Shows room temperature even when the controller is turned off, for easy monitoring
· Linkage Function – Optional device-to-device automation (e.g., with AC or fresh air damper)
· IR Remote Ready – Optional infrared remote control for convenient operation
· Compact Size – 86×86×38mm fits standard wall boxes
· Lightweight – 170g for easy installation
Operation Functions
1. Multi-speed Manual Operation Mode
– Stop speed, Low speed, Medium speed, High speed adjustable under manual mode.
– Manual mode runs at fixed fan speed set by user.
2.Timing Operation Mode
– Automatically run according to pre-set start/stop time and designated fan speed.
– Fan speed cannot be modified when timing function is activated.
3. Bypass Damper Control Function
– Short press fan speed key to open or close bypass air valve under power-on state.
4. Filter Runtime Reminder & Reset Function
– Short press fan key for 3s: view cumulative filter working hours.
– Long press fan key for 8s: clear recorded filter runtime data.
– Filter alarm reminder: blink icon at 1000H, steady-on icon at 3000H service alert.
5. Clock & Weekly Timer Setting
– Long press clock button to enter time setup.
– Adjustable options: Week, Hour, Minute, Timed ON/OFF time & corresponding running fan speed.
6. Button Lock & Parameter Functions
– 485 Communication Address Setup: Long press Mode+Speed key 5s to set Modbus address (for RS485 model only).
– Factory Reset: Long press Power+Up key 5s to restore factory default parameters.
7. Fault Alert & Advanced Custom Parameters
– Sensor Failure Alarm: Display error E1 when temperature sensor malfunctions.
– Advanced configurable items: Temperature calibration, fan speed definition, backlight setting, power-off memory options etc.