Technical data

7 181 465 346 GB (03.02)
38
Failure identification procedure
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 , restart the appliance.
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 Look for point where damp is entering switchbox
and seal as necessary (cable grommets properly
fitted, ...?).
B Refit PCB control board.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
B Press , restart the appliance.
F7? ↓3.
no: ↓3.
3. 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: ↓4.
4. The PCB control board is damaged. B Make a note of the altered service settings (see
table 1, "First Service Level; Values that can be
modified" at page 8 and table 5, "Secondary
Service Level; Values that can be modified" at
page 11).
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.