20 VELUX
®
Break-glass point
In case of fire:
Break the glass cover and press the red
button. All windows connected to the control system
open. The red light-emitting diode over the red button in
the control unit is on and an acoustic alarm sounds. All
ventilation and rain sensor functions are disengaged.
Yellow light-emitting diode
In case of system errors, the yellow light-emitting diode
flashes on and off and an acoustic alarm sounds. Error
indication occurs, if cables for motors, break-glass
points or smoke detectors are interrupted or short-
circuited, or if the batteries are defective. If additional
break-glass points are connected, the corresponding
diodes in these will also flash on and off and an acoustic
alarm sounds.
Additional information on error causes can be seen on
the printed circuit board in the control unit. See section
Status and error indications in control system
.
Green light-emitting diode
Under normal operation conditions, the green light-
emitting diode in the control unit is on. All other light-
emitting diodes are off. If additional break-glass points
are connected, the corresponding diodes in these will
also be on.
Open
Stop
Close
Operating buttons for comfort ventilation
A short press of the top ventilation button opens the
window to max comfort ventilation position.
A short press of the bottom ventilation button closes
the window completely.
By pressing and holding the top or bottom ventilation
button, the window opens/closes until the button is
released.
By pressing the stop button or by pressing the top and
bottom buttons simultaneously, the window stops.
By means of the timers in the control unit it is possible
to set the duration of the opening when the window is
opened for comfort ventilation and set automatic closing
of the window. See section
Ventilation switch KFK 200
.
Note:
If a rain sensor is fitted, the comfort ventilation
function will automatically be blocked if rain is detected.
Operation of and signals
from control unit
