| Fault Description | System Behaviour | 
|---|---|
| B1 | Code plug not detected | 
| C6 | Fan speed too low | 
| E2 | Central heating (CH) flow negative thermistor coefficient (NTC) sensor defective | 
| E9 | Safety temperature limiter in central heating (CH) flow has tripped | 
| EA | Flame not detected | 
| F0 | Internal error | 
| F7 | Flame detected even though appliance switched off | 
| FA | Flame detected after gas shut off | 
| FD | Reset button pressed by mistake | 





