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0020003579A
9 Fault Finding
Diagram 9.4
BOILER PILOT FAULT FINDING
12419
Ls N
GAS
CONTROL
VALVE
IGNITION
ELECTRODE
br BROWN
b BLUE
g/y GREEN/YELLOW
g GREY
bk BLACK
p PURPLE
r RED
w WHITE
FAN
Ls = LIVE (Switched)
N = NEUTRAL
= EARTH MAIN
KEY TO
TERMINAL BLOCK
KEY
b
b
b
b
b
b
p
r
g
g
r
p
bk
bk
bk
bk
bk
g/y
g/y
g/y
g/y
br
br
br
bk
AIR
PRESSURE
SWITCH
JUMPER
POSITION
RESET
INDICATOR
BLOCK
CONNECTOR
MAINS SUPPLY
230V~50Hz
BURNER LIT
INDICATOR
T 3.15A
FUSE
THERMISTOR
P.C.B.
(CONTROL BOARD)