Observation:
PLEASE SELECT ERROR CODE FROM LIST BELOW:
| CODE / | DESCRIPTION | CODE / | DESCRIPTION |
| F2 | FLAME LOSS | Fd | NO WATER FLOW |
| F3 | FAN FAULT | F⅃ | DIFF GREATER THAN 50°C |
| F4 / L4 | FLOW THERMISTOR | Fn / Ln | FLAME LOSS |
| F5 / L5 | RETURN THERMISTOR | FU | DIFF GREATER THAN 50°C |
| F6 | OUTDOOR SENSOR | L1 | FLOW TEMPERATURE OVERHEAT |
| F7 | LOW MAINS VOLTAGE | L2 | IGNITION LOCKOUT |
| F8 / L8 | PCB FAULT | L6 | FALSE FLAME LOCKOUT |
| F9 / L9 | PCB FAULT | L7 | UNDER 5°C RISE ON 3 OCCASIONS |
| FA / FE | RETURN TEMP HIGHER THAN FLOW | LC | 5 BOILER RESETS |
