Technical data

8
8.1
8.2
8.3
8.4.1
8.4.2
FAULT FINDING CHART FOR BRITONY II FF
PROBLEM
Pilot does not light
Poor Pilot Flame
Pilot will not stay alight
Main burner does not light
Burner goes out
on hot water demand
CAUSE
i) Gas service cock closed
ii) Air in pipe
iii) Pilot injector blocked
iv) No ignition spark
i) Pilot injector dirty
ii) Wrong injector
iii) Pilot head blocked
iv) Faulty pilot tube
v) Pilot injector loose
i) Pilot flame poor
ii) Thermocouple not working
iii) Thermoelectric valve faulty
iv) Gas pressure low/variable
v) Terminal wrongly positioned
vi) Badly assembled flue
vii) Pressure switch out of adjustment
/iii) Pressure switch faultv
ix) Plugs loose on PCB
x1 PCB faulty
i) Gas service cock not open fully
ii) Gas pressure low
iii) Water rate low
iv) Gas valve not opening
v) Diaphragm punctured
vi) Venturi blocked or loose
vii) Gas control tap faulty
/iii) Slow ignition device screwed
fully home
i) Fan not switching to high speed
ii) Pressure switch out of adjustment
iii) High pressure tube detached
iv) Flue blocked
v) PCB faulty
REMEDY
Dpen service cock
Purge line
Clean or change
Check electrode, lead and ignitor
Clean or change
Change for correct diameter (0.23)
Clean
Clean or replace
Tighten
See 8.2) Above
a) Check connection clean and tighten
as necessary
b) Replace if output less than 8 mv.
Replace if drop out greater than 5 mv.
Check at inlet to appliance (see 5.2)
Re-position (see 2.4)
Re-fit check sealing
a) Check operation (see 5.5)
b) Adjust (see 7.11)
Replace (see 7.10)
Secure
Replace (see 7.8)
Open fully
Check at manifold and at inlet with
the appliance running (see page 3 and 5.2)
Check if water rate is sufficient
(see page 3)
Check (v) and (vi)
Change diaphragm (see Section 7.5)
Check venturi
Check operation of User’s gas
control tap
Adjust (see 5.3)
a) Check micro-switch operation (see 5.4)
b) Adjust micro-switch (see 7.13)
c) Micro-switch defective -
replace (see 7.12)
d) Fan defective - replace (see 7.7)
a) Check pressure switch operation
(see 5.5)
b) Adjust pressure switch (see 7.1 I)
c) Pressure switch defective -
replace (see 7.10)
Refix
Check and clear
Replace (see 7.8)
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