| Error code | Possible fault | Installer action | |
|---|---|---|---|
| E10 | Link | Outdoor Sensor Error | Outdoor Sensor Fault, Check The Sensor: Check In IP Menu The Outdoor Sensor Value Reads Correctly. |
| E20 | Central Heating Thermistor Sensor Fault | Check resistance reading across the Sensor is approx. 12kohms at 25 degrees c. if not suspect sensor. | |
| E28 | Flue Thermistor Fault | Check flue Sensor Value Reads Correctly. Check for blocked flue. | |
| E54 | HW Flow Sensor Fault | Check resistance reading across the Sensor is approx. 12kohms at 25 degrees c. if not suspect sensor. | |
| E78 | Water Pressure Sensor Fault | ||
| E100 | Internal Clock Time Error On PCB | Not Correct Configuration Of Clock Time; Reset clock. | |
| E109 | Poor Circulation | Check pump; Check that the system is full of water; Check for blockages in the system. | |
| E110 | Boiler Overheat Tripped | Check that boiler temp is not over 110 degrees C; Check for continuity across the O/H stat; Check pump for circulation; Clear air from system. | |
| E111 | Maximum Limit Of Flow Temperature | Check that boiler temp is not over 110 degrees C; Check for continuity across the O/H stat; Check pump for circulation; Clear air from system. | |
| E117 | System Pressure High (> 2.9 Bar) | This Is Displayed When The Primary Water Pressure Is Greater Than 2.8 Bar. Drain water from system until pressure is at 1 - 1.5bar. Check expansion vessel is charged. | |
| E118 | System Pressure Low (< 0.5 Bar) | Check for water leaks; Check the expansion vessel has the correct charge; Add Water Via Filling Loop. Restoring The Correct Pressure Will Reset The Error. | |
| E119 | System Pressure Low (< 0.5 Bar) | Check for water leaks; Check the expansion vessel has the correct charge; Add Water Via Filling Loop. Restoring The Correct Pressure Will Reset The Error. | |
| E125 | Primary Water Circulation Fault | Check pump; Check that the system is full of water; Clear air from system; Check for blockages in the system; Check that the thermistors are correctly located. | |
| E127 | Legionella Protection Temperature Not Reached | ||
| E128 | Loss Of Flame During Operation | Loss Of Flame In Operation; Check Clean Or Replace The Sensing Electrode, Clean The Burner Surface And Re-Calibrate. | |
| E133 | Ignition Fault | Check The Wiring; Check The Supply Pressure; Purge The Gas Supply To Remove Air; Check for spark at electrode; Check Ignition and sensing Electrode Condition and Clean/Replace If Necessary; Check Gas Valve is opening; Check Condensate Drain For Blockage. | |
| E153 | Forced Reset Unit Unlocked | Heating Flow Switch Error (Ireland) Pressure Sensor Error (UK) | |
| E160 | Fan Fault | Check The Fan And The Cable; Probable cause fan failure. | |
| E162 | Air Pressure Switch Error | Check connections across air pressure switch. | |
| E164 | Heating Flow Switch Error (Ireland) Pressure Sensor Error (UK) | Heating Flow Switch Error (Ireland) Pressure Sensor Error (UK) | |
| E166 | Air Pressure Switch Fault | Check connections across air pressure switch. | |
| E270 | Dry Fire | Check The Sensor; Check the system has water in it; Check the pump for circulation. | |
| E432 | Earth Connection Error | Check electrical supply to appliance. | |
| E433 | Heat Exchanger Temperature Exceeded (Greater Than 95 Degrees) | This is a temporary error and will clear automatically. |