18 – ENGLISH
7.2 SIGNALS ON THE CONTROL UNIT
The control unit has LEDs “L1-L8” on the buttons and LEDs “L9-
L13” and the “OK” LED on the control unit terminals (“Figure
26”).
Each of these LEDs can emit special signals, both during nor-
mal operation and in case of anomalies. “Table 11” and “Table
12” describe the cause and possible solution for every type of
anomaly.
6 7 8 9 10 11 12 13
L9
OK
L10
L11
L12
L13
L1 L8
..
26
Table 11
SIGNALS OF THE LED ON THE CONTROL UNIT TERMINALS
Status Meaning Possible solution
All LEDs
No LED is lit No power to the control unit
Check whether the control unit is powered: measure on terminals 6-7 a
voltage of roughly 30 VDC (or 24 VDC if battery-powered).
Check the 2 fuses; if the OK LED is also not lit nor ashes, there may be a
serious fault, therefore the control unit must be replaced.
OK LED
OFF Anomaly
Make sure there is power supply; verify whether the fuses are blown; if
necessary, identify the reason for the failure then replace the fuses with
others of the same type
On Serious anomaly
There is a serious anomaly; try switching off the control unit for a few
seconds; if the condition persists, it means there is a fault and the circuit
board needs to be replaced
1 ash per second All OK
The control unit works normally
1 ash every 5 seconds All OK
Control unit in stand-by mode
2 quick ashes
The status of the inputs has
changed
This is normal when there is a change affecting one of the inputs: OPEN,
STOP, intervention of the photocells, or when the radio transmitter is used
Series of ashes
separated by a one-
second pause
Various This is the same signal as the one on the warning light (see “Table 10”)
STOP LED
OFF
Intervention of the ALT
(STOP) input
Check the devices connected to the STOP input
On All OK
STOP Input active
PHOTO LED
OFF
Intervention of the PHOTO
input
Check the devices connected to the PHOTO input
On All OK
PHOTO input active
PHOTO1 LED
OFF
Intervention of the PHOTO1
input
Check the devices connected to the PHOTO1 input
On All OK
PHOTO1 input active
Sbs LED
OFF All OK
Sbs input not active
On Intervention of the Sbs input
Normal if the device connected to the Sbs input is active
AUX LED
OFF All OK
AUX input not active
On
Intervention of the AUX
input
Normal if the device connected to the AUX input is active
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