| Display |
Fault |
| spark' and 'F' and 'flashing red LED' |
Ignition fault (lockout) caused by no gas, no detection |
| 'fan' and 'F' and 'flashing red led' |
Air fault, pressure switch, no power to fan |
| '05' and 'phone' and 'F' and 'flashing red LED' |
Overheat fault |
| '06' and 'phone' and 'F' and 'flashing red LED' |
Central heating flow NTC fault |
| '08' and 'phone' and 'F' and 'flashing red LED' |
Micro accumulation vessel NTC fault |
| '09' and 'phone' and 'F' and 'flashing red LED' |
Water pressure sensor fault |
| '11' and 'phone' and 'F' and 'flashing red LED' |
No reception by the main board (MMI Lead) |
| '12' and 'phone' and 'F' and 'flashing red LED' |
User interface or distant control panel fault |
| '13' and 'phone' and 'F' and 'flashing red LED' |
Main board fault |
| '14' and 'phone' and 'flashing red LED' |
Over temperature on primary water circuit |
| '15' and 'phone' and 'F' and 'flashing red LED' |
Stepper motor fault (gas valve) |
| '16' and 'phone' and 'F' and 'flashing red LED' |
Gas safety value failure |
| '17' and 'phone' and 'F' and 'flashing red LED' |
Power supply <170V |
| '18' and 'phone' and 'F' and 'flashing red LED' |
Local user interface fault |
| '19' and 'phone' and 'F' and 'flashing red LED' |
Central heating NTC not connected to pipe |
| '20' and 'phone' and 'F' and 'flashing red LED' |
User interface not compatible with boiler |
| '0.5bar' flashing and 'F' and 'flashing red LED' |
Lack of water fault (<0.5b) |
| '2.7bar' flashing and 'F' and 'flashing red LED' |
Upper water pressure (>2.7b) |
