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FAULT FINDING - Page 19
SYMPTON
PILOT LIT BUT MAIN BURNER
WILL NOT LIGHT ON WATER
FLOW
NO OR LOW WATER FLOW
RATE
HIGH WATER FLOW RATE
HIGH WATER TEMPERATURE
POSSIBLE CAUSE
1.
Gas inlet pressure low.
2.
Low water flow caused by blocked
water filter.
3.
Faulty diaphragm. Will also cause a
high water rate
4.
Automatic gas valve push rod jammed.
May also cause a high water rate.
5.
Slow ignition screw incorrectly set. Will
also cause a high water rate.
1.
Blocked water filter.
2.
Heat exchanger blocked with lime.
3.
Loss of service water main pressure.
See LOW WATER TEMPERATURE
1.
Automatic gas valve push rod sticking.
Water rate will be normal.
SOLUTION
1.
Call in your local British Gas
Region
2.
Clean the debris from the filter.
3.
Replace the Diaphragm
Assembly - Part No 10/17572.
4.
Dismantle clean and regrease
using Dow Corning 111 silicone
grease. Handle the push rod
with care, do not bend.
5.
See Fig. 16 for the position of
the screw. Turning the screw
clockwise delays the ignition,
anti-clockwise advances the
ignition. The screw should be
set 2 full turns out (anti
clockwise) from the fully in
position. When correct the
burner ignition should be smooth
and quiet when a hot water
outlet is opened.
1.
Clean the debris from the filter.
2.
Descale or replace - Part No
10/17558.
3.
Contact your Local Water
Authority.
1.
Dismantle clean and regrease
using Dow Corning 111 silicone
grease. Handle the push rod
with care, do not bend.
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