Operating instructions RolloTron Comfort DuoFern 1800/1840/1805 Y. Beenen Updated April 19, 2024 17:57 Follow Download PDF Related articles Operating instructions RolloTron Comfort DuoFern 1800/1840/1805 (Older version with up/down buttons) Activate login mode: RolloTron Comfort DuoFern 1800/1805/1840 Simple basic setting of the RolloTron Comfort DuoFern 1800/1840/1805 Operating instructions RolloTron Standard DuoFern 1400/1405/1440 Operating instructions RolloTron Standard 1300/1340/1305