24 Instructions GD0
5.6
Diagnostics and Signals
A few devices issue special signals that allow you to recognize the operating status or possible malfunctions.
Figure 74
A
5.6.1
Photocells
The photocells are equipped with a “SAFE” LED [A] (Figure 74) that allows you to check the operating status at any time.
During the manoeuvre the flashing light flashes once every second, while the courtesy light is always on; when something is wrong the flashes are
more frequent (half a second); the light flashes twice with a second’s pause between flashes. The diagnostic flashing itself is signalled by the courtesy
light.
Table 12
Quick flashes
Status
Action
2 flashes
1 second’s pause
2 flashes
Triggering of a photocell
At the starting of the manoeuvre, one or more photocells do not
enable it; check to see if there are any obstacles. If there is an
obstacle impeding the movement no action is required.
3 flashes
1 second’s pause
3 flashes
Activation of the “motor force” limiting device
During the movement, the door experienced excessive friction;
identify the cause
4 flashes
1 second’s pause
4 flashes
Activation of the STOP input
During the movement the STOP input was activated; identify the
cause
5.6.2
Flashing and courtesy lights
“SAFE” LED
MEANING
STATUS OUTPUT
ACTION
Always Off
Signal OK= No obstacle
Active
All OK
Slow flash
Weak signal = No obstacle
Active
Improve centring
Rapid flash
Poor signal = No obstacle
Active
Check centring, cleanliness and surroundings
Always on
No signal = Obstacle present
Alarm
Remove obstacle
Table 11
