17
Fault messages and troubleshooting
GC 304 R
Display
Effect
Cause
Elimination
The door
opens for
no apparent
reason.
It is raining and the
sensor detects the
movement of the
rain drops.
X
Check whether uni mode has
been selected.
X
Increase the immunity filter.
X
Install a rain cap.
In metallic environ-
ments the sensor
detects objects that
are not in the detec-
tion area.
X
Change the antenna angle.
X
Reduce the area size.
X
Increase the immunity filter.
In interlocking door
systems the sensor
detects the move-
ment of the opposite
door.
X
Change the antenna angle.
X
Replace the antenna.
X
Increase the immunity filter.
The LED flashes
quickly follow-
ing unlocking.
The sensor requires
an access code for
unlocking.
X
Enter the access code.
X
Forgotten the access code?
Switch the power supply off
and on to unlock the sensor.
The sensor
does not react
to the remote
control.
The batteries are not
sufficiently charged
or not inserted
correctly.
X
Check and/or replace the
batteries.
The remote control
is not aligned to the
sensor.
X
Align the remote control to
the sensor.
