7 181 465 347 (01.07)
Rectifying faults
39
7. B Test gas supply pressure
1)
- OK?. yes: ↓8.
no: B Decommission appliance.
B Notify gas company.
8. Problem with flue?
B Check CO
2
level in combustion
air.
> 0,2 % CO
2
?
yes: B Check flue and repair or replace if necessary.
Ignition poor? ↓8.
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
levels.
no: ↓9.
10. Burner not correctly fitted or defec-
tive?
B Remove burner.
Cover fixings not tight
or
seal defective or not correctly fitted
or
burner defective.
B Replace burner and seal if necessary
B Ensure seal is fitted in correct position.
1) See installation instructions
Ignition too harsh, ignition poor
Check Action
Loose or broken contact on heat store NTC sensor
Check Action
Heat store NTC sensor lead is not fit-
ted as described in the installation
instructions (i.e. the cable does not
pass through the cable grip in the
switchbox).
B Record condition of appliance as found in custo-
mer service record.
B Route cable as specified in installation instruc-
tions.
Text display fails to respond, no display or display incorrect
Check Action
Ignition lead is not fitted as specified
in installation instructions (i.e. the
lead should be routed through the
clip on the underside of the air box).
B Route cable as specified in installation instruc-
tions.
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