Becker R12/17C, Assembly And Operating Instructions Manual, Page: 19 / 28

Upper anti-freeze mechanism
The upper anti-freeze mechanism helps to prevent the roller shutter from freezing in the upper limit position, as the roller shutter
stops just before the upper stop. The distance from the upper stop is automatically cyclically checked and, if necessary, correc‐
ted.
The upper anti-freeze mechanism is deactivated on delivery.
Both limit positions must be set before the anti-freeze mechanism can be activated.
Note
The anti-freeze mechanism only works if a permanent stop is set at the upper limit position of the roller shut‐
ter. The anti-freeze mechanism is not visible until the shading solution has reached the upper stop from the
lower limit position 3 times in succession.
When both or individual limit positions are deleted, this set function is deleted as well.
Activating/Deactivating upper anti-freeze mechanism
Open the shading solution to the upper limit position.
Press the programming button on the master transmitter for approx. 3 seconds.
[
The tubular drive makes a “click” sound to confirm.
Then re-press the programming button and also the STOP and UP buttons for approx. 3
seconds.
Æ
The tubular drive clicks 3 times to confirm.
Obstacle detection
Caution
Obstacle detection is only active in conjunction with the “drive adapter for obstacle detection”.
In addition, please note that the drive must be pushed in to the shaft as far as the band of the thrust ring.
If the drive is correctly installed, it switches off when it detects obstructions or shutter faults.
The following are detected:
In the DOWN direction
▪
A curtain jam when closing due to objects on the window sill or sticking of the lateral guide tracks.
In the UP direction
▪
Extremely large increase in the load (e.g., ice on the end strip)
To ensure that the roller shutter curtain safely enters the guide tracks, obstacle detection is inactive for approx. 1.5 revolutions of
the barrel from the upper limit position.
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