Observation:
Please select from the fault code list below:
| CODE / | DESCRIPTION | CODE / | DESCRIPTION |
| E20 | FLOW SENSOR FAULT | E28 | FLUE NTC FAULT |
| E40 | RETURN SENSOR FAULT | E321 | DHW SENSOR FAULT |
| E160 | FAN OR FAN WIRING FAULT | E118 | SYSTEM WATER PRESSURE TOO LOW |
| E117 | SYSTEM WATER PRESSURE TOO HIGH | E110 | SAFETY THERMOSTAT OPERATED |
| E109 | PRE CIRCULATION FAULT | E125 | CIRCULATION FAULT (PRIMARY) |
| E128 | FLAME FAILURE | E270 | DRY FIRE (CIRCULATION) |
| E133 | FLAME FAILURE - AFTER 4 ATTEMPTS AT IGNITION | E384 | FALSE FLAME |
| E151 | PCB INTERNAL FAULT | E385 | INPUT VOLTAGE TOO LOW |
| E386 | FAN SPEED NOT ACHIEVED | E130 | FLUE THERMISTOR OPERATED |
| E111 | OVERHEAT SAFETY LIMIT |
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