F7 and fault indicator LED are flashing – Although appliance switches off, flame still detected.
| Check | Action | ||
|---|---|---|---|
| 1. | Electrode(s) dirty or defective? - Switch OFF the appliance. - Remove electrode assembly and bracket and check for wear, deposits and mechanical damage. | yes: | - Replace electrode assembly. - Switch ON the appliance. - Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. F7? go to 2 |
| no: | - Refit electrode assembly. - Switch ON the appliance. - Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. F7 go to 2 |
||
| 2. | Problem with flue? - Check CO2 level in combustion air in the flue (with outer casing fitted). Is CO2 level above 0.2%? | yes: | There are flue gases in the combustion air. - Check flue and repair or replace if necessary. F7? go to 3 |
| no: | go to 3 | ||
| 3. | The PCB is damaged. | Make a note of the altered service settings. B Switch OFF the appliance. - Disconnect the boiler power connection. - Change PCB control board. - Reconnect the appliance power connection. - Switch ON the appliance. - Restore service settings previously noted down. |
A green transition that works for you.
Save up to £400 a year on your heating bill with a hybrid heat pump from Econic Energy
Your gateway into the low carbon future
Get fully-designed, and sold heat pumps jobs, expert support, and attractive compensation + flexibility without the admin.