24
2000225228A
N
FAN
SAFETY
TEMPERATURE
LIMITER
P.C.B (CONTROL BOARD)
GAS
CONTROL
VALVE
THERMISTOR
ELECTRODE
AIR
PRESSURE
SWITCH
RESET LED
T3.15A FUSE
p
y
g
p
b
bk
b
bk
bk
b
r
g
y
br br
br
br
br
r
g/y
br BROWN
b BLUE
g/y GREEN/YELLOW
g GREY
bk BLACK
p PURPLE
y YELLOW
r RED
KEY
g/y
BURNER LIT LED
MAINS SUPPLY
230V~50Hz
BLOCK CONNECTOR
p
y
bl
L
P
L
P
= LIVE (Permanent)
L
S
= LIVE (Switched)
P
L
= PUMP LIVE
P
N
= PUMP NEUTRAL
L
S
NP
L
P
N
g/y
g/y
g/y
br
br
b
b
= NEUTRAL
= EARTH MAIN
= EARTH PUMP
KEY TO TERMINAL BLOCK
PUMP
*
*
NOTE: A switch live (Ls) should be connected
from an external control.
If no external control is available insert a link
between Lp & Ls.
9 Fault Finding
Diagram 9.5
10274
Does pump continue to run after
SL is interrupted?
YES
Does pump stop after several
minutes?
System satisfactory.
NO
YES
YES
NO
Does the pump run when SL is applied ?
Pump Overrun Operation
Diagram 9.4
NO
Faulty PCB. Replace
The PCB has a timed pump overrun facility.
The pump should run for several minutes after remote
controls have stopped calling for heat.
Before using the fault finding chart ensure all wiring is correct
and in good condition, the pump is not faulty and check the
PCB fuse.
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