Observation:
PLEASE SELECT ERROR CODE FROM LIST BELOW:
| CODE / | DESCRIPTION | CODE / | DESCRIPTION |
| E01 | IGNITION FAILURE | E24 | WATER PRESSURE LOST 4 TIMES IN 24 HRS |
| E02 | FALSE FLAME | E26 | FLAME SIGNAL LOST 5 TIMES IN 4 MINUTES |
| E03 | BOILER OVERHEAT | E30 or E31 | FLOW SENSOR |
| E04 or E05 | FAN FAILURE | E32 or E33 | DHW SENSOR |
| E07 | FLUE OVERHEAT | E34 or E35 | MAINS VOLTAGE / FREQUENCY INCORRECT |
| E08 | FLAME CIRCUIT ERROR | E38 | RESET KEY FAULT |
| E09 | VALVE DRIVE ERROR | E40 | WATER PRESSURE TO HIGH |
| E10 or E25 | CONTROL BOX ERRORS | E41 or E99 | COMMUNICATION ERROR |
| E11 | CALIBRATION FLOW & RETURN SENSORS | E43 or E44 | RETURN SENSOR |
| E12 to E22 | CONTROL BOX ERRORS | E45 or E46 | FLUE SENSOR |
| E23 / E37 / E47 | WATER PRESSURE ERROR | E81 | CONTROL BOX ERROR |