19. Incorrect function (continued) Fault Cause Solution The boiler doesn’t start No gas, no water or no electricity Check gas, water and electrical supplies, fuses… Air in the gas pipe Purge the air from the gas pipe Room thermostat switched off Turn the room thermostat up Red indicator alight Overheat lockout (A01) No flame after safety time (A03) No flame detected (E04) Flame lift (E18) Wait for a few minutes Press the reset button 28 (Fig. 107) the red led goes out and the boiler attempts to re-light. If the red indicator lights too frequently, please call your local service centre. Noises in CH system Radiators rise in temperature During summer season Air presence in CH system or insufficient pressure Gravity effect in the CH system Diverter valve sticking Purge the system of air (Section 14.2, page 29) and increase the system pressure (Section 2, page 6) Close the heating flow isolating valve (41 Fig. 2, page 5). Don’t forget to open it again before starting the heating. Remove and Clean 20. Maintenance If these solutions do not cure the fault, call a qualified professional 20.1 General remarks It is recommended that the following inspections be carried out on the boiler at least once a year; 1. Check the seals in the water group, and if necessary, replace the gasket and restore the seal to perfect working order; 2. Check the seals in the gas group, and if necessary replace the gaskets and restore the seal to perfect working order; 3. Visually check the overall condition of the boiler; 4. Visually check the combustion, and if necessary, disassemble and clean the burner; 5. Following inspection 3, disassemble and clean the combustion chamber as necessary; 6. Following inspection 4, disassemble and clean the injector, if necessary; 7. Clean the primary heat exchanger. (see Section 20.2); 8. Check and adjust the CO2 emissions as necessary (see Section 14.3); 9. Check the correct operation of the heating safety devices: - Overheat thermostat 10. Check the correct operation of the flow switches; 11. Check the correct operation of the low pressure switch; 12. Check the diverter valve movement; 13. Check the correct operation of the gas group safety devices: - absence of gas or flame safety device (ionisation); 14. Check that the electrical connections are correct (as described in Section 13, page 26 Fig 29); 15. Check the efficiency of the production of domestic hot water (test the flow rate and temperature rise); 16. Carry out a general inspection of the boiler; 17. Check the flue and termination point; 18. Remove any oxide from the detection electrode by using an emery cloth. 20.2 Cleaning the primary exchanger Cleaning the exhaust side Remove the air gas assembly (Section 18.2.1). Check that the exhaust passages are free, if there are deposits present, clean the exchanger with compressed air or wash with water or a vinegar based detergent. 54
20. Maintenance Instructions (continued) Cleaning the water side Use detergents that dissolve CaCO3. Leave to act for a short time and then rinse. Make sure that the detergent does not remain inside the exchanger. 20.3 Operational test Unscrew the lower part of the condensate trap and clean it. Fill it with water and replace. After carrying out the maintenance operation, fill the heating circuit to a pressure of approximately 1.5 bar and release the air from the system. Also fill the domestic hot water system. - Place the boiler in operation. - If necessary, release the air again from the heating system. - Check the settings, seals and the correct functioning of the system for expelling the products of combustion and drawing combustion air. - Check the settings and correct operation of all the control, regulation and monitoring components. - Check that the burner ignites properly and carry out a visual check of the burner flame. - Check that the 3 bar safety valve is operating correctly. - Check the operation of the time control and room thermostat (if fitted). NOTE: THESE CHECKS ARE NOT EXHAUSTIVE ONCE THE BOILER HAS BEEN SERVICED IT IS NECESSARY TO COMPLETE THE SERVICE INTERVAL RECORD (SECTION 25, PAGE 61) 55
19. Incorrect function (continued) Fault Cause Solution The boiler doesn’t start No gas, no water or no electricity Check gas, water and electrical supplies, fuses… Air in the gas pipe Purge the air from the gas pipe Room thermostat switched off Turn the room thermostat up Red indicator alight Overheat lockout (A01) No flame after safety time (A03) No flame detected (E04) Flame lift (E18) Wait for a few minutes Press the reset button 28 (Fig. 107) the red led goes out and the boiler attempts to re-light. If the red indicator lights too frequently, please call your local service centre. Noises in CH system Radiators rise in temperature During summer season Air presence in CH system or insufficient pressure Gravity effect in the CH system Diverter valve sticking Purge the system of air (Section 14.2, page 29) and increase the system pressure (Section 2, page 6) Close the heating flow isolating valve (41 Fig. 2, page 5). Don’t forget to open it again before starting the heating. Remove and Clean 20. Maintenance If these solutions do not cure the fault, call a qualified professional 20.1 General remarks It is recommended that the following inspections be carried out on the boiler at least once a year; 1. Check the seals in the water group, and if necessary, replace the gasket and restore the seal to perfect working order; 2. Check the seals in the gas group, and if necessary replace the gaskets and restore the seal to perfect working order; 3. Visually check the overall condition of the boiler; 4. Visually check the combustion, and if necessary, disassemble and clean the burner; 5. Following inspection 3, disassemble and clean the combustion chamber as necessary; 6. Following inspection 4, disassemble and clean the injector, if necessary; 7. Clean the primary heat exchanger. (see Section 20.2); 8. Check and adjust the CO2 emissions as necessary (see Section 14.3); 9. Check the correct operation of the heating safety devices: - Overheat thermostat 10. Check the correct operation of the flow switches; 11. Check the correct operation of the low pressure switch; 12. Check the diverter valve movement; 13. Check the correct operation of the gas group safety devices: - absence of gas or flame safety device (ionisation); 14. Check that the electrical connections are correct (as described in Section 13, page 26 Fig 29); 15. Check the efficiency of the production of domestic hot water (test the flow rate and temperature rise); 16. Carry out a general inspection of the boiler; 17. Check the flue and termination point; 18. Remove any oxide from the detection electrode by using an emery cloth. 20.2 Cleaning the primary exchanger Cleaning the exhaust side Remove the air gas assembly (Section 18.2.1). Check that the exhaust passages are free, if there are deposits present, clean the exchanger with compressed air or wash with water or a vinegar based detergent. 54
20. Maintenance Instructions (continued) Cleaning the water side Use detergents that dissolve CaCO3. Leave to act for a short time and then rinse. Make sure that the detergent does not remain inside the exchanger. 20.3 Operational test Unscrew the lower part of the condensate trap and clean it. Fill it with water and replace. After carrying out the maintenance operation, fill the heating circuit to a pressure of approximately 1.5 bar and release the air from the system. Also fill the domestic hot water system. - Place the boiler in operation. - If necessary, release the air again from the heating system. - Check the settings, seals and the correct functioning of the system for expelling the products of combustion and drawing combustion air. - Check the settings and correct operation of all the control, regulation and monitoring components. - Check that the burner ignites properly and carry out a visual check of the burner flame. - Check that the 3 bar safety valve is operating correctly. - Check the operation of the time control and room thermostat (if fitted). NOTE: THESE CHECKS ARE NOT EXHAUSTIVE ONCE THE BOILER HAS BEEN SERVICED IT IS NECESSARY TO COMPLETE THE SERVICE INTERVAL RECORD (SECTION 25, PAGE 61) 55
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