Unical M 3000 S, Installation And Servicing Instructions

Page: 30 / 36

30
Error codes
4
ERROR CODES
The three leds indicated on the PCB of the thermal module
show few but foundamental informations that can help during
the service operations.
To get acces to the leds it is necessary to remo-
ve the cover of the electrical box.
RED LED (DL1):
ON = An error has been detectedo
OFF = None error detectd
GREEN led (DL2):
ON = Operation in heating mode
LAMP. = Anti-freeze function is ON
OFF = Stand-by
YELLOW led (depends on the applications).
For a secondary module (SLAVE):
For a main M 3000 S (Master) connected to a boiler with
data communication capacity (with both switches 2 - 3 in
ON position):
For a main M 3000 S (Master) connected to a boiler without
data communication capacity
(with switch 2 in ON and switch 3 in OFF position):
DL1
DL1
DL2
DL2
DL2
If the YELLOW leds (DL3):
ON = Correct communication with the boiler
LAMP. = None communication with the boiler
DL3
DL3
If the YELLOW led (DL3):
ON = There is a heat demand to the boiler
OFF = There is no heat demand to the boiler
DL3
DL3
ON = Correct communication with the MASTER
module
BLINKING = No communication with the MASTER
module
DL3
DL3
4
3
2
1
A1
A2
4
3
2
15
6
7
8
5
6
A6
5
6
A4
1
2
3
4
5
6
7
JP
2
Y2
Y3
GND 1
GND 2
GND 3
Y1
JP
1
BOARD 00630130
BOARD 00630132
BOILER
1
2
3
4
ON
1 2
A3
1
2
3
A7
LINE
NEUT
A5
1
2
3
4
1
2
3
4
DL
1
DL
2
DL
3
1
2
3
4
ON
1
2
3
4
ON
That can be seen on the PCB