7 181 465 347 (01.07)
Rectifying faults
33
F7 and flashing.
Although appliance switches off, flame still detected
Check Action
1. Electrode(s) dirty or defective. B Power OFF the appliance.
B Replace electrode assembly.
B Turn ON the appliance.
B Press , does appliance restart???
F7? ↓2.
2. B Power OFF the appliance.
B Disconnect the boiler electrical
connection.
B Remove PCB control board.
PCB control board damp?
yes: B Dry PCB control board (e.g. with hair dryer).
B Refit PCB control board.
B Reconnect the boiler electrical connection.
B Press , does appliance restart???
F7? ↓3.
no: ↓3.
3. Is there a problem with the flue?
B Check CO
2
level in combustion
air.
> 0,2 % CO
2
?
yes: B Check flue and repair or replace if necessary.
no: ↓4.
4. The PCB control board is damaged. B Power OFF the appliance.
B Disconnect the boiler electrical connection.
B Change PCB control board.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
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