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33
Rectifying faults
Error F7
F7 and flashing.
Although appliance switches off, flame still detected
Check Action
1. Electrode(s) dirty or defective?
B Power OFF the appliance.
B Remove electrode assembly and
bracket and check for wear,
deposits and mechanical damage.
yes: B Replace electrode assembly.
B Turn ON the appliance.
B Press , restart the appliance.
F7? ↓2.
no: B Refit electrode assembly.
B Turn ON the appliance.
B Press , restart the appliance.
F7? ↓2.
2. 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.
no: ↓3.
3. The PCB control board is damaged. B Make a note of the altered service settings (see
table 1 on page 7).
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.
B Restore service settings previously noted down.
FA and flashing.
After appliance switches off flame is detected
Check Action
1. Is the condensation trap blocked? yes: B Power OFF the appliance.
B Clean out condensation trap discharge pipe.
B Turn ON the appliance.
B Press , restart the appliance.
FA? ↓2.
no: ↓2.
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