Loose Or Broken Contact On Dhw Cylinder Ntc Sensor - Worcester ZWBR 7-30 R 30 HE PLUS COMBI Service Booklet

Rectifying faults
Error Fd
Ignition too harsh, ignition poor
Check
B Test gas supply pressure - OK?
7.
Does pressure match figure speci-
fied in installation instructions?
8. Problem with flue?
B Check CO
level in combustion
2
air.
Is CO level above 0,2 % ?
2
9. Flue gas CO levels measured at
2
min. and max. load do not match
specified levels?
B Measure CO
levels.
2
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?

Loose or broken contact on DHW cylinder NTC sensor

Check
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).
40
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
↓8.
yes:
B Decommission appliance.
no:
In case of natural gas:
B Notify gas company.
B Check flue and repair or replace if necessary.
yes:
Ignition poor? 9.
↓9.
no:
B Adjust CO
yes:
Ignition poor? 10.
↓10.
no:
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.
Action
B Record condition of appliance as found in cus-
tomer service record.
B Route cable as specified in installation instruc-
tions.
level as per installation instructions.
2
7 181 465 347 (05.01)