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221834B
Diagram 13.3
13 Fault Finding
554
8
I.C. P.C.B. CONNECTIONS: ie STAT (Pin No. from bottom)
PLASTIC
OVERHEAT
CONTROL
THERMOSTAT
FAN
NO C
NC
MAIN TERMINAL STRIP CONNECTIONS
CONTROL THERMOSTAT CONNECTIONS
PRINTED CIRCUIT BOARD CONNECTIONS
9
8
7
PUMP
PUMP
OVERRUN
✽ RED LINK MAY HAVE BEEN
REMOVED TO FIT REMOTE CONTROLS
3
1
4
OVERHEAT
THERMOSTAT
PL
SL
IL
PN
N
AIR PRESSURE
SWITCH
✽ RED LINK
FUSE
TYPE F2A
IGNITION
P.C.B.
GV
B1
GV
B2
GV
2
LOW FLAME NEON
Lamp N(2)
HIGH FLAME
NEON
Lamp(1)
HIGH/LOW
SWITCH
CONDENSE
CUT-OFF
Amp Con
Stat(2)
Lamp
N(1)
Stat(4) Lamp(3)
Lamp
N(3)
DEMAND
NEON
Stat(1)P.C.B.(2)
P.C.B.(4) CM1(1)
P.C.B.(1)
8
1
10
6
9
5
2
7
CM1(2)
P.C.B.(3) GV1(1)
GV1(3)
GV1(2)
GV2(1 ) GV2(2)
y
y
w
r
r
b
br
bk
y
w
p
b
br
bk
br b
Stat(3)
KEY:
r - RED
br - BROWN
p - PURPLE
b - BLUE
bk - BLACK
y - YELLOW
w - WHITE
g - GREY
br
p
bk
bbk
3
6
g
g
bk bk
p
rr
w
w
CM1(3)
r
bk