Error code | Possible fault | Installer action | |
---|---|---|---|
H.01 - .00 | Temporary Fault - Temporary loss of communication between gas valve and boiler board. Fault in air/gas unit. Loose connection to gas valve. | Replace air gas unit. Check gas valve connectionfrom PCB. |
|
H.01 - .05 | Temporary Fault - Maximum difference between the flow and return temperature exceeded.Non-existent or insufficient circulation. Sensor error. | Check circulation.?Check water pressure.?Check sensors are operating correctly.?Check that the sensor has been correctly fitted.?Check the cleanliness of the heat exchanger. | |
H.01 - .08 | Temporary Fault - Flow temperature increasing too fast in heating mode. Non-existent or insufficient circulation. Sensor error | Check circulation. Check water pressure. Check sensors are operating correctly. Check that the sensor has been correctly fitted. Check the cleanliness of the heat exchanger. |
|
H.01 - .14 | Temporary Fault - Maximum flow temperature value exceeded. Non-existent or insufficient circulation. Non-existent or insufficient circulation. | Check circulation. | |
H.01 - .18 | Temporary Fault - No circulation of water. Non-existent or insufficient circulation. Sensor error. | Check circulation. Check water pressure. Check sensors are operating correctly. Check that the sensor has been correctly fitted. Check the cleanliness of the heat exchanger. Check pump. |
|
H.01 - .21 | Temporary Fault - Flow temperature increasing too fast in DHW mode. Non-existent or insufficient circulation. Sensor error. | Check circulation. Check water pressure. Check sensors are operating correctly. Check that the sensor has been correctly fitted. Check the cleanliness of the heat exchanger. |
|
H.02 - .02 | Temporary Fault - No input of parameters C1/C2. PCB not configuerd. | Input C1/C2. | |
H.02 - .03 | Temporary Fault- Incorrect configuration settings C1/C2. | Reset C1/C2. | |
H.02 - .04 | Temporary Fault - Parameter error. Incorrect parameters. | Reset C1/C2. | |
H.02 - .06 | Temporary Fault - System water pressure. Water leak on boiler. Water leak on system. | Check boiler. Check system. Repressurise system. |
|
H.03 - .00 | Temporary Fault - Communication error with NTC flue sensor. Sensor not, or badly connected. Bad connection. Sensor fault. | Check wiring. Check sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary |
|
H.03 - .01 | Temporary Fault - Communication error with the HMI PCB. HMI not connected. | Check wiring. | |
H.03 - .02 | Temporary Fault - No flame during operation. No ionization current. | Purge gas supply to remove air. Check gas valve is fully opened. Check supply pressure. Check operation and setting of the gas valve unit. Check air inlet and flue gas discharge flues are not blocked. Check that there is no recirculation of flue gases. |
|
E.00 - .04 | Permanent Fault - Return temperature sensor open-circuit. Sensor not or badly connected. Bad connection. Sensor fault. | Check the wiring. Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary. |
|
E.00 - .05 | Permanent Fault - Return temperature sensor short-circuit. Sensor not or badly connected. Bad connection. Sensor fault. | Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary. |
|
E.01 - .02 | Permanent Fault - Temperature measured by return sensor greater than flow sensor. Bad connection. Sensor fault. Sensor not or badly connected Water circulation direction reversed. Flow and return pipes reversed. | Replace the sensor if necessary. Check the circulation (direction, pump, valves). Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Check pipework configuration. |
|
E.01 - .04 | Permanent Fault - Loss of flame detected 5 times in 24 hours (With burner on). No ionization current. | Purge the gas supply to remove air. Check that the gas valve is fully opened. Check the supply pressure. Check the operation and setting of the gas valve unit. Check that the air inlet and flue gas discharge flues are not blocked. Check that there is no recirculation of flue gases. |
|
E.01 - .11 | Permanent Fault Requiring Reset - Incorrect fan speed. External draught over the boiler. Defective gas/air unit.. | Check for adequate draw on the chimney connection. Check the gas/air unit and replace if necessary. |
|
E.01 - .12 | Permanent Fault Requiring Reset - Temperature measured by return sensor greater than flow temperature. | Check sensors | |
E.01 - .17 | Permanent Fault Requiring Reset - No circulation. Sensor not or badly connected. Sensor fault. | Vent the air in the heating system. Check the water pressure. Check the wiring. Check the circulation (direction, pump, valves). Check the cleanliness of the heat exchanger. Check that the sensors are operating correctly. Check that the sensor has been.correctly fitted. Replace the sensor if necessary. |
|
E.01 - .20 | Permanent Fault - Maximum flue gas temperature value reached (>140 Deg C). No circulation. Sensor fault.. | Vent the air in the heating system. Check the water pressure. Check the wiring. Check the circulation (direction, pump, valves). Check the cleanliness of the heat exchanger. Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary. |
|
E.02 - .00 | Permanent Fault - Boiler reset in progress. Reset button has been pressed. | Boiler carrying out reset (Information only). | |
E.02 - .07 | Permanent Fault - Low system water pressure. Water leak on boiler. Water leak on system. | Check boiler. Check system. Repressurise system. |
|
E.02 - .16 | Permanent Fault - On board CSU time-out. Check PCB for damage. | Replace the PCB if necessary. | |
E.02 - .17 | Permanent Fault - Permanent loss of communication between gas valve and boiler PCB. Fault in air/gas unit. Loose connection to gas valve. | Replace air/gas unit. Check gas valve connection from PCB. |
|
E.02 - .19 | Permanent Fault - Jumper 1 changed. Check position of jumper 1. | Put jumper 1 to the off position. | |
E.02 - .20 | Permanent Fault - Jumper 2 changed. Check position of jumper 2. | Put jumper 2 to the off position. | |
E.02 - .21 | Permanent Fault - Jumper 3 changed. Check position of jumper 3.. | Put jumper 3 to the off position. | |
E.02 - .47 | Permanent Fault - Connection to external device unsuccessful. Check wiring to external device. | Check wiring. | |
E.02 - .48 | Permanent Fault - Configuration to external device unsuccessful. Check pairing to external. | Pair the devices. | |
E.04 - .00 | Permanent Fault - Gas valve fault. Gas valve not detected. | Check the wiring. Check resistance across gas valve terminals. Replace gas valve if necessary. |
|
E.04 - .01 | Permanent Fault - Flow temperature sensor short-circuited. Sensor not or badly connected. Bad connection. Sensor fault. | Check the wiring. Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary. |
|
E.04 - .02 | Permanent Fault - Flow temperature sensor open-circuited. Sensor not or badly connected. Bad connection. Sensor fault. | Check the wiring. Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary. |
|
E.04 - .03 | Permanent Fault - Critical flow temperature reached. Non-existent or insufficient circulation. | Check circulation. | |
E.04 - .04 | Permanent Fault - Flue temperature sensor short-circuited. Sensor not or badly connected. Bad connection. Sensor fault. | Check the wiring. Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary. |
|
E.04 - .05 | Permanent Fault - Flow temperature sensor open-circuited. Sensor not or badly connected. Bad connection. Sensor fault.. | Check the wiring. Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary. |
|
E.04 - .06 | Permanent Fault - Critical flue gas temperature value reached. No circulation. Sensor fault. | Vent the air in the heating system. Check the water pressure. Check the wiring. Check the circulation (direction, pump, valves). Check the cleanliness of the heat exchanger. Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary |
|
E.04 - .08 | Permanent Fault - Maximum safe temperature value reached. (Safety thermostat open-circuited). No circulation. Sensor not or badly connected. Bad connection. Sensor fault. | Vent the air in the heating system. Check the water pressure. Check the wiring. Check the circulation (direction, pump, valves). Check the cleanliness of the heat exchanger. Check that the sensors are operating correctly. Check that the sensor has been correctly fitted. Replace the sensor if necessary. |
|
E.04 - .10 | Permanent Fault - Five burner start-up failures. | If no ignition: Check cabling of ignition transformer. Replace the ionization/ignition electrode. Check the breakdown to earth. Check the condition of the burner set. Check the earthing. Defective gas/air unit. If ignition arc but not flame formation: Check that the gas valve is fully opened. Check the supply pressure. Purge the gas supply to remove air. Check the operation and setting of the gas valve unit. Check that the air inlet and flue gas discharge flues are not blocked. Check the wiring on the gas valve. Defective gas/air unit. If presence of flame but insufficient ionization (<1_A): Check that the gas valve is fully opened. Check the supply pressure. Replace the ionization/ignition electrode. Check the earthing. Check the wiring on the ionization/ignition electrode. |
|
E.04 - .12 | Permanent Fault - False flame signal. Short-term fluctuation of the mains. Ionization current present even though there is no flame. The burner remains very hot (CO2 too high). Defective gas/air unit. | Press the RESET button for 5 seconds. Replace the ionization/ignition electrode. Set the CO2. Check the gas/air unit and replace if necessary. |
|
E.04 - .13 | Permanent Fault - Fan rotor blocked. Fan seized. Wiring to fan damaged. | Replace air/gas unit. | |
E.04 - .17 | Permanent Fault - Problem with gas valve. Defective gas/air unit. | Replace air/gas unit |