| Fault Code | System Behaviour | Possible solution / cause |
|---|
| F000 |
Sensor defect |
Heat exchanger sensor needs replacing. |
| F001 |
Temperature too high during central heating demand |
Air could be in system, central heating system needs bleeding. There could be an error with the pump & it could need replacing. |
| F002 |
Temperature too high during domestic hot water (DHW) demand |
The wiring of DHW sensor needs checking, possible breakage. |
| F003 |
Flue gas temperature too high |
Heat exchanger needs checking for contamination. |
| F004 |
No flame during startup |
Gas valve is closed. Condensation drain is blocked and ignition needs checking. |
| F005 |
Flame disappears during operation |
Condensation drain could be blocked, the air supply duct and flue needs checking for possible recirculation or blockage of flue gases. |
| F006 |
Flame simulation error |
Gas valve could need replacing or burner controller could need replacing. |
| F007 |
No or insufficient ionisation flow |
Wiring of ionisation/ignition pin could have a breakage shut down and could need replacing. |
| F008 |
Fan speed incorrect |
Fan cable needs checking, fan or burner controller could need replacing. |
| F009 |
Bunner controller has internal fault |
Burner controller needs replacing. |
| F010, F011 |
Sensor fault |
Possible issue with heat exchanger sensor, breakage or not connected properly. |
| F012 |
Sensor 5 fault |
Wiring for flue gas sensor needs checking, possible breakage. |
| F014 |
Mounting fault sensor |
Heat exchanger sensor is not mounted correctly and needs to be mounted properly. |
| F015 |
Mounting fault sensor S1 |
Central heating flow sensor is not mounted correctly and needs mounting properly. |
| F016 |
Mounting fault S3 |
Domestic hot water sensor is not mounted correctly and needs mounting properly. |
| F018 |
Flue and / or air supply duct is blocked |
The flue and/or air supply duct could need cleaning. |
| F019 |
BMM error |
Check the BMM wiring for breakages / BMM wiring could need replacing. |
| F027 |
Short circuit of outdoor sensor |
Outdoor sensor could have a wiring issue, check and replace the outdoor sensor. |
| F028 |
Reset error |
The reset button needs checking for unintentional operation e.g. cleaning of control panel. Burner controller might need replacing. |
| F029 |
Gas valve error |
Gas valve needs checking for leakage / burner controller could need replacing |
| FO30 |
Sensor S3 fault |
Check wiring of domestic hot water sensor for breakage or shutdown domestic hot water sensor – it could need replacing. |
| F031 |
Sensor fault S1 |
Check wiring of central heating flow sensor for breakage and shutdown. Check that weather central heating flow sensor is connected correctly. |
