Gira 1287 00 Operating Instructions Manual page 16

"Türöffnerzeit" adjuster
The activation time of the door opener is set at the "Türöffn-
erzeit" adjuster. The setting time lies in the range 1 second to
10 seconds. The potentiometer can be adjusted with a screw-
driver with a 3 mm blade.
"Betrieb" indicator
During trouble-free normal operation, only the green "Betrieb"
LED illuminates. It indicates that the device is being supplied
with power.
"Überlast" indicator
The audio control device is equipped with an electronic over-
load protection which protects the electronics of the control
device against short-circuits and overloading on the bus line.
The overload protection is activated if, for example, the bus
line is short-circuited due to an installation error or too many
bus devices/bus loads are connected.
The red "Überlast" LED indicates both short-circuits and over-
loads. The flashing duration of the LED corresponds to the
time during which the bus voltage is deactivated when a fault
occurs. The LED then flashes for up to 20 seconds after the
fault has been eliminated.
With a permanent overload (or short-circuit), the bus voltage
is switched off for approx. 180 s after the third overload detec-
tion. During this switch-off phase, the "Systemprog.", "Türöff-
nerprogr." and "Überlast" LEDs flash.
The LEDs then flash for up to 180 seconds after the fault has
been eliminated.
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