Supplied By www.heating spares.co Tel. 0161 620 6677
RECTIFYING FAULTS
8 716 115 748 (2009/09)
55
7.
B
Test gas supply pressure - OK?
Does pressure match figure
specified in installation
instructions?
yes:
go to 8
no:
B
De-commission appliance.
In case of natural gas:
B
Notify gas utility.
8.
Problem with flue?
B
Check CO
2
level in combustion air
in the flue (with outer casing
fitted).
Is CO
2
level above 0.2%?
yes:
There is flue gas in the combustion air.
B
Check flue and repair or replace if necessary.
Ignition poor? go to 9
no:
go to 9
9.
Flue gas CO
2
levels measured at
min. and max. load do not match
specified levels?
B
Measure the CO
2
or O
2
level.
yes:
B
Adjust CO
2
level as per installation instructions.
Ignition poor? go to 10
no:
go to 10
10.
Burner incorrectly fitted or
defective?
B
Switch OFF the appliance.
B
Turn off gas valve.
B
Remove burner.
Cover fittings loose
or
seal defective or incorrectly fitted
or
burner defective?
B
Replace burner and seal if necessary.
B
Ensure seal is fitted in correct position.
B
Open the gas valve.
B
Switch ON the appliance.
B
Check appliance for leaks.
Ignition too harsh, ignition poor
Check
Action
Condensation in the air box
Check
Action
1.
Is diaphragm in air/gas manifold
fitted correctly (see installation
instructions)?
B
Open air/gas manifold.
B
Check diaphragm for correct
orientation, soiling and splitting.
B
Fit diaphragm as per installation instructions or
replace.
B
Close air/gas manifold
(see installation
instructions).