Supplied By www.heating spares.co Tel. 0161 620 6677
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40
Rectifying faults
Error Fd
7. B Test gas supply pressure - OK?
Does pressure match figure speci-
fied in installation instructions?
yes: ↓8.
no: B Decommission appliance.
In case of natural gas:
B Notify gas company.
8. Problem with flue?
B Check CO
2
level in combustion
air.
Is CO
2
level above 0,2 % ?
yes: B Check flue and repair or replace if necessary.
Ignition poor? 9.
no: ↓9.
9. Flue gas CO
2
levels measured at
min. and max. load do not match
specified levels?
B Measure CO
2
levels.
yes: B Adjust CO
2
level as per installation instructions.
Ignition poor? 10.
no: ↓10.
10. Burner not correctly fitted or defec-
tive?
B Power OFF the appliance.
B Turn off gas cock.
B Remove burner.
Cover fixings not tight
or
seal defective or not correctly fit-
ted
or
burner defective?
B Replace burner and seal if necessary.
B Ensure seal is fitted in correct position.
B Open the gas cock.
B Turn ON the appliance.
B Check appliance for leaks.
Ignition too harsh, ignition poor
Check Action
Loose or broken contact on DHW cylinder NTC sensor
Check Action
DHW cylinder NTC sensor lead is
not fitted as described in the installa-
tion instructions (i.e. the cable does
not pass through the cable grip in the
switchbox).
B Record condition of appliance as found in cus-
tomer service record.
B Route cable as specified in installation instruc-
tions.
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