Nice MC824HHS, Instructions And Warnings For Installation And Use

Page: 18 / 28

18 – ENGLISH
7.2 SIGNALS ON THE CONTROL UNIT
The control unit has LEDs “ L1-L8 ” on the buttons and LEDs “ L9-
L13
” on the control unit terminals (“
Figure 22
”).
Each of these LEDs can emit special signals both during normal
operation and in case on anomalies. “ Table 10 and Table 11 ”
describe the cause and possible solution for each type of anomaly.
Close Open SbS Stop
Bluebus
11 12
L1 L8 ..
Close Open SbS Stop Bluebus
8 9 10 11 12
L9 L10 L11 L12 L13
22
Table 10
SIGNALS OF THE LEDS 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.
Check that the fuse ( T - “ Figure 1 ”) has not blown. If the fuse has blown,
verify the cause and replace it with one having the same characteristics.
If also the “ BlueBus ” LED is not lit or flashing, there probably is a serious fault
that requires the control unit to be replaced.
BLUEBUS LED
Green LED always off Anomaly
Check whether the control unit is powered.
Check that the fuse ( T - “ Figure 1 ”) has not blown. If the fuse has blown,
verify the cause and replace it with one having the same characteristics.
Green LED always on Serious anomaly
There is a serious problem: try disconnecting the power supply to the control
unit and if the condition persists, replace the electronic board.
1 flash per second of the
green LED
Everything normal
Normal control unit operation.
2 fast flashes of the
green LED
Variation of the status of the
inputs
This is normal if there is a change in one of the “SbS”, “Stop”, “Open” or
“Close” inputs, the control photocells intervene or a command is transmitted
with a transmitter.
Series of flashes of the
red LED divided by a
1-second pause
Various Refer to that shown in “ Table 9 ”.
STOP LED
OFF
Intervention of the “Stop”
input
Check the devices connected to the “Stop” input.
On All OK “Stop” 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.
OPEN LED
OFF
Everything normal
“Open” input not active.
On
Intervention of the “Open”
input
This is normal if the device connected to the “Open” input is active.
CLOSE LED
OFF
Everything normal “Close” input not active.
On
Intervention of the “Close”
input
This is normal if the device connected to the “Close” input is active.