Tab_3 (diagrams "A", "C" and "D")
Led status
Mode of operation
Off
Board in Stand-by (contact CV open)
On
Board on (contact CV closed)
Temperature H
1 Blink
Temperature H
2 Blinks
Motor locked/disconnected or safety grille open
3 Blinks
Water temperature sensor open or short circuited
4 Blinks
At every start-up, the system checks the software version of the power board
5 Blinks
The motor feedback indicates a speed > 1400 rpm
The motor feedback indicates a speed < 100 rpm
6 Blinks
(see locked fan function)
Tab_4 (diagrams "A", "C" and "D")
Terminal box
Connections
H
O
2 water temperatures sensor (optional)*
2
M1
DC motor
Intake grille safety microswitch
S1
(to be connected only on some models, removing the bridge)
F - N
Board supply 230V - 50Hz
Y1
Solenoid valve 230V - 50Hz, 1A
CFG
Jumper open to select the mode 'contacts'
COM
Common
EV
Solenoid valve management / Fan enabling **
MAX
Max speed
MED
Medium speed
MIN
Minimum speed
SIL
Super-minimum speed
E / I
Summer/Winter mode selection (Open: Winter)
Led
Mode/status indication
SW1
Machine configuration selector
* the water sensor is optional: if connected, the board will allow operation of the fan only with water temperature suitable
for the selected mode of operation (higher than 30°C in winter mode and lower than 20°C in summer mode). If it is not
connected, the board shall not carry out any check of water temperature.
** The fan operation is enabled only when the EV input is closed. Follow the connection diagram to the EV input even if
the valve management is not required. When the EV input is closed, only output Y1 is energised.
EN - 12
O > 20°C in summer mode or
2
O < 30°C in winter mode
2
THIS SIGNAL IS NOT AN ALARM