During Operation: Flame Not Detected - Worcester ZSBR 7-28 ICS1 Service Booklet

Rectifying faults
EA
and

During operation: flame not detected

Check
1. Is the flame present?
2. Is the gas cock open?
3. Is there air in the supply pipe?
4. Did the thermical security of the gas
cock lock out?
5. Natural gas models:
does the building have a supply pres-
sure regulator?
LPG models:
is the flow rate of the gas supply to
the appliance correct?
28
flashing.
yes:
no:
yes:
no:
yes:
no:
yes:
no:
yes:
no:
yes:
no:
Action
↓6.
↓2.
↓3.
B Open the gas cock
B Press , does appliance restart???
EA? ↓3.
B Vent supply pipe.
B Press
, does appliance restart???
EA? ↓4.
↓4.
B Reset security.
B Press
, does appliance restart???
EA? ↓5.
↓5.
B Check that it is fitted correctly and functioning
properly and correct if necessary.
B Check supply pressure, inform gas company if
outside correct range.
B Press
, does appliance restart???
EA? ↓6.
↓6.
↓6.
B Is there enough gas in the supply cylinder?
B Is there air in the supply pipe?
B Is the solenoid valve in the "meter cabinet" open-
ing?
B Is the supply pressure OK? (if the supply pres-
sure is too high, check the pressure regulator in
the "meter cabinet" and on the LPG supply cylin-
der).
B Press
, does appliance restart???
EA? ↓6.
7 181 465 347 (01.07)