Fault Finding - Saunier Duval Ecosy 2 SB 28E Instructions For Use Installation And Servicing

KEY
Red
Black
Blue
Brown
Green
Yellow
Green/Yellow
White
Orange
Grey
Red/White
Blue/White bl/wh
P.C INTERFACE
X7
*
Do NOT connect
to these terminals
r/wh
X4
bl/wh
*
Ribbon cable
X8
CONTROL PANEL
FLOW N.T.C.
THERMISTOR
b
RETURN N.T.C.
THERMISTOR
b
OUTSIDE
SENSOR
Schematic Wiring Diagram

12 Fault Finding

r
b
bl
br
gr
y
g/y
FLAME IGNITION AND
wh
IONISATION ELECTRODE
or
gy
r/wh
AUTOMATIC CONTROL MODULE
b
bl
wh r
r
b
D.C. FAN
1 gr
3 gr
AIR
PRESSURE
SWITCH
X1-1
X1-2
X1-3
X1-4
X1-5
INTERNAL
FUSES
F1=2AF
gy
r
b wh
or gr
r/wh
27
BLACK LOW
VOLTAGE PLUG
Room thermostat
Clock/timer
Frost thermostat
230V/50Hz
WHITE
MAINS PLUG
br
bl
CHASSIS
EARTH POINT
bl
g/y
br
PUMP
GAS
y
CONTROL
VALVE
br
bl
r
g/y
g/y
RESISTOR
220 / 7W
Diagram 12.1
221879A