1.Power off and restart the unit. Check whether the louver resets. If it resets, the unit works normally.
2. Check if the louver is stuck. Manually reset the louver when power is disconnected.
3.If the louver still fails to move or cannot reset after power‑off restart: this indicates a hardware fault (swing motor or main control board). Arrange for a technician to perform on‑site inspection and repair.