The use of Ferroli boilers for hot water supply systems is an ideal solution for those cases, when a high flow rate of hot water is required. There are other cases, when Ferroli boilers are an ideal solution. Ferroli boiler troubleshooting system provided in the table below is an ideal solution for diagnostics of any Ferroli appliance.
| Fault | Display code | Possible cause | Cure |
|---|---|---|---|
| No burner ignition | F1 | • Nogas | • Check the regular gas flow to the boiler and the air has been purged from the pipes. |
| • Detection or ignition electrode fault | • Check the wiring of the electrode and that it is correctly positioned and free of any deposits | ||
| • Defective gas valve | • Check and change the gas valve | ||
| • Ignition power too low | • Adjust the ignition power | ||
| • Condensate discharge full or dirty | • Check and clean condensate discharge | ||
| Flame present with burner off signal | F2 | • Electrodefault | • Check the ionizing electrode wiring |
| • PCB fault | • Check the card | ||
| Safety thermostat trips | F3 | • Heating sensor damaged • No water circulation in the system • Air in the system | • Check the correct positioning and operation of the heating sensor • Check the circulator • Vent the system • Check the system bypass is sufficient |
| Air pressure switch (fails to dose the contacts within 60 sec. of turning on the fan) | F5 | • Air pressure switch contact open | • Check the wiring to the fan |
| • Incorrect wiring to the air pressure switch | • Check the pressure switch | ||
| • Incorrect restrictor ring fitted | • Change the restrictor ring | ||
| • Flue not correctly sized or obstructed | • Check the fan venturi | ||
| Delivery sensor fault | F7 | • Sensor damaged • Wiring shorted • Wiring broken | • Check the wiring or change the sensor |
| Tap water sensor fault | F9 | • Sensor damaged • Wiring shorted • Wiring broken | • Check the wiring or change the sensor |
| Low system pressure | F37 | • System empty • Low Water pressure switch not connected or damaged | • Fill the system to 1 -1.5 bar • Check the low water pressure switch |
| Fault | Possible cause | Cure | |
|---|---|---|---|
| F1 | No burner ignition | •No gas | •Check the regular gas flow to the boiler and the air has been purged from the pipes. |
| •Detection or ignition electrode fault | •Check that the electrodes are correctly positioned and free of any deposits | ||
| •Defective gas valve | •Check and change the gas valve | ||
| •Incorrect inlet gas pressure | •Check inlet gas pressure | ||
| •Siphon obstructed | •Check and if necessary change the siphon | ||
| F2 | flame detected with the burner off | •Ionisation electrode defected | •Check the ionizing electrode wiring |
| •Main board defected | •Check the CVBC | ||
| F3 | 100°C Safety thermostat trips | •Flow sensor not active or correctly located | •Check the correct positioning and operation of the flow sensor |
| •No system circulation | •Check the pump and radiator valves present in the system | ||
| F5 | Fan problem | •Tachometer signal interrupted, fan connection | •Check the wiring and fan |
| •Fan damaged, debris in fan | •Check the fan, clean debris | ||
| F8 | No flame after the ignition phase | •CVBC fault | •Check and if necessary change the CVBC |
| •Ionisation probe fault | •Change/clean ionisation probe | ||
| •Mains interference | •Check the earthing | ||
| F9 | No communication between the CVBC and the gas valve | •Incorrect wiring •Damaged valve | •Check the wiring •Check the CVBC •Change the valve |
| F10 -F22 | Microprocessor trouble | • Microprocessor operating trouble | • Cut off and restore the electricity supply. If the trouble remains, check and/or change the main PCB |
| F25 | Software fault | • Software operating fault | • Cut off and restore the electricity supply. If the trouble remains, check and/or change the CVBC |
| F26 | No flame after the ignition phase (5 times in 4 min.) | •Detection electrode faut | • Check that the electrode is corre positioned and is necessary char it |
| •Flame instable | • Check the burner | ||
| •Incorrect valve gas Offset | • Check Offset at the minimum | ||
| •Flue gas circuit obstructed | •Check if flue gas circuit is free | ||
| •Siphon obstructed | • Check and if necessary change t! siphon | ||
| F30 | Flow sensor fault | • Sensor damaged or short circuited | • Check the wiring or change the sensor |
| F31 | Flow sensor fault | • Sensor damaged or wiring broken | • Check the wiring or change the sensor |
| F34 | Supply voltage under 190V. or over 250V. | • Electric mains trouble | • Check the electrical system |
| F35 | Irregular mains frequency | • Electric mains trouble | • Check the electrical system |
| F36 | Main PCB trouble | •Faulty CVBC •Water on CVBC | • Change the electronic CVBC |
| F37 | Incorrect system water pressure | •Pressure too low | •Fill the system |
| •Sensor damaged | •Check the sensor | ||
| F43 | Return sensor fault | • Sensor damaged or wiring shorted | • Check the wiring or change the sensor |
| F44 | Return sensor fault | • Sensor damaged or wiring broken | • Check the wiring or change the sensor |
| F45 | Flue sensor fault | • Sensor damaged or wiring shorted | • Check the wiring or change the sensor |
| F46 | Flue sensor fault | • Sensor damaged or wiring broken | • Check the wiring or change the sensor |
| Fault code | Fault | Possible cause | Cure |
|---|---|---|---|
| A01 | No burner ignition | No gas | Check the regular gas flow to the boiler and that the air has been purged from the pipes |
| Detection or Ignition electrode fault | Check that the electrodes are correctly positioned and free of any deposits | ||
| Defective gas valve | Check and change the gas valve | ||
| Incorrect inlet gas pressure | Check inlet gas pressure | ||
| Siphon obstructed | Check and if necessary change the siphon | ||
| A02 | Flame detected with the burner off | Ionization electrode defective | Check the ionizing electrode wiring |
| Main board defective | Check the PCB | ||
| A03 | High limit protection | Flow temperature sensor not active or correctly located | Check the correct positioning and operation of the flow sensor |
| No system circulation | Check pump and radiator valves present in the system Check operation of the internal by-pass | ||
| A04 | Flue gas fault | Fault F07 happened 3 times in the last 24 hours | Check the flue |
| A05 | Fan problem | Tachometer signal interrupted for 1 hour or longer | Check the wiring and the fan |
| A06 | No flame after the ignition phase (6 times in 4 minutes) | Detection electrode fault | Check that the electrodes are correctly positioned and if necessary change it |
| Flame unstable | Check the burner | ||
| Incorrect valve gas Offset | Check the Offset at the minimum power | ||
| Flue gas circuit obstructed | Check if flue gas circuit is free | ||
| Siphon obstructed | Check and if necessary change the siphon | ||
| A41 | Flow sensor disconnected | Sensor disconnected | Check the correct positioning and operation of the flow sensor |
| F07 | High fume temperature | The exchanger probe detects and excessive temperature for over 2 minutes | Check the exchanger |
| F10 | Flow sensor fault | Sensor damaged or short circuited Sensor damaged or wiring broken | Check the wiring or change the sensor |
| F11 | Return sensor fault | Sensor damaged or v/iring shorted Sensor damaged or wiring broken | Check the wiring or change the sensor |
| F12 | DHW sensor fault | Sensor damaged Wiring shorted Wiring disconnected | Check the wiring or replace the sensor |
| F13 | Exchanger probe fault | Sensor damaged or v/iring shorted Sensor damaged or wiring broken | Check the wiring or replace the probe |
| F14 | Flow sensor fault | Sensor damaged or short circuited Sensor damaged or wiring broken | Check the wiring or change the sensor |
| F15 | Fan problem | Tachometer signal interrupted, fan connection | Check the wiring and the fan |
| Fan damaged, debris in fan | Check the fan. clean debris | ||
| F34 | Supply voltage under 170V | Electric supply problem | Check the electrical system |
| F35 | Irregular mains frequency | Electric supply problem | Check the electrical system |
| F37 | Incorrect system water pressure | Pressure too low | Fill the system |
| Sensor damaged | Check the sensor | ||
| F39 | External probe fault | Sensor damaged or short-circuited | Check the wiring or change the sensor |
| F42 | Flow sensor fault | Sensor damaged | Change the sensor |
| Problem | Cause/Solutions |
|---|---|
| After a few attempts at ignition, the electronic controller shuts down the boiler. | Pilot light nozzle dirty Clean with compressed air. Check the regular gas flow to the boiler and the air has been eliminated from the pipes. Check that the electrodes are correctly positioned and free of any deposits (see fig. 21). Make sure that the boiler is connected to a good earth connection. Check the connections to the ignition and ionization electrodes. |
| The electrodes are not discharging in the ignition phase. | Check that the electrodes are correctly positioned and free of any deposits (see fig. 21). Regulation thermostat adjusted too low. Check the electrical power supply. Check the connections to the ignition and ionization electrodes. Check the connections at the electronic flame controller. Make sure that PHASE and NEUTRAL are not inverted and that the earth contacts are efficient. Check the inlet gas pressure and any open pressure switches. Reset the safety thermostat. Reset the fume thermostat. Make sure the room thermostat is closed. |
| The burner burns poorly: flames too high, too low or too yellow. | Gas valve filter dirty. Check the gas supply pressure. Gas nozzles dirty. Make sure that the boiler is not dirty. Make sure that ventilation in the room where the unit is located is sufficient for good combustion. |
| Smell of unburnt gas. | Make sure that the boiler is clean. Check the draught of the flue. Check that gas consumption is not excessive. |
| The boiler works but the temperature fails to increase. | Check the 2-stage adjustment thermostat works properly. Check that the operator of the 2nd stage of the gas valve (full power) is supplied (see Fig. 14). Check that gas consumption is not less than that provided for. Make sure that the boiler is perfectly clean. Check that the boiler is adequate for the system. Check that the heating pump is not blocked. |
| Temperature of the water to the system too high or too low. | Check the 2-stage adjustment thermostat works properly. Check that the pump is not blocked. Make sure that the characteristics of the circulating pump are adequate for the system. |
| Burner explosion. Delay on ignition. | Check that the gas pressure is sufficient and the boiler casing is not dirty. |
| The adjustment thermostat switches back on with too great a temperature difference. | Check that the thermostat bulb is properly inserted in the sheath. Check the 2-stage thermostat works properly. |
| The boiler produces condensation water. | Check that the boiler is not operating at too low a temperature (below 50°C). Check that gas consumption is regular. Check the efficiency of the flue. |
| The boiler goes out for no apparent reason. | Fume thermostat trips. Safety thermostat trips due to temperature rise. |
| Fault code | Fault | Possible cause | Cure |
|---|---|---|---|
| A01 | No burner ignition | No gas | Check the regular gas flow to the boiler and that the air has been purged from the pipes |
| Detection or Ignition electrode fault | Check that the electrodes are correctly positioned and free of any deposits | ||
| Defective gas valve | Check and change the gas valve | ||
| Incorrect inlet gas pressure | Check inlet gas pressure | ||
| Siphon obstructed | Check and if necessary change the siphon | ||
| A02 | Flame detected with the burner off | Ionisation electrode defective | Check the ionising electrode wiring |
| Main board defective | Check the PCB | ||
| A03 | High limit protection | Flow temperature sensor not active or correctly located | Check the correct positioning and operation of the flow sensor |
| No system circulation | Check pump and radiator valves present in the system Check operation of the internal by-pass | ||
| A04 | Flue gas fault | Fault F07 happened 3 times in the last 24 hours | Check the flue |
| A05 | Fan problem | Tachometer signal interrupted for 1 hour or longer | Check the v/iring and the fan |
| A06 | No flame after the ignition phase (6 times in 4 minutes) | Detection electrode fault | Check that the electrodes are correctly positioned and if necessary change it |
| Flame unstable | Check the burner | ||
| Incorrect valve gas Offset | Check the Offset at the minimum power | ||
| Flue gas circuit obstructed | Check if flue gas circuit is free | ||
| Siphon obstructed | Check and if necessary change the siphon | ||
| A41 | Flow sensor disconnected | Sensor disconnected | Check the correct positioning and operation of the flow sensor |
| A42 | Flow sensor fault | Sensor damaged | Change the sensor |
| F07 | High fume temperature | The exchanger probe detects and excessive temperature for over 2 minutes | Check the exchanger |
| F10 | Flow sensor fault | Sensor damaged or short circuited | Check the wiring or change the sensor |
| Sensor damaged or wiring broken | |||
| F11 | Return sensor fault | Sensor damaged or wiring shorted | Check the wiring or change the sensor |
| Sensor damaged or wiring broken | |||
| F12 | DHW sensor fault | Sensor damaged | Check the v/iring or replace the sensor |
| Wiring shorted | |||
| Wiring disconnected | |||
| F13 | Exchanger probe fault | Sensor damaged or wiring shorted | Check the wiring or replace the probe |
| Sensor damaged or wring broken | |||
| F14 | Flow sensor fault | Sensor damaged or short circuited | Check the wiring or change the sensor |
| Sensor damaged or wring broken | |||
| F15 | Fan problem | Tachometer signal interrupted, fan connection | Check the v/iring and the fan |
| Fan damaged, debris in fan | Check the fan. dean debris | ||
| F34 | Supply voltage under 170 V | Electric supply problem | Check the electrical system |
| F35 | Irregular mains frequency | Electric supply problem | Check the electrical system |
| F37 | Incorrect system water pressure | Pressure too low | Fill the system |
| Sensor damaged | Check the sensor | ||
| F39 | External probe fault | Sensor damaged or short-circuited | Check the wiring or change the sensor |
| F43 | Exchanger protection activation. | No system circulation | Check the circulating pump |
| Air in the system | Vent the system | ||
| F 52 | Flow sensor fault | Sensor damaged | Change the sensor |
| A61 | Controller ABM03A fault | Controller ABM03A internal error | Check the earth connection and replace the controller if necessary. |
| A62 | No communication between controller and gas valve | Controller not connected | Connect the controller to the gas valve |
| Valve damaged | Replace the valve | ||
| A63, A64, F66 | Controller ABM03A fault | Controller ABM03A internal error | Check the earth connection and replace the controller if necessary. |
| Fault | Possible cause | Cure | |
|---|---|---|---|
| F1 | No burner ignition | • No gas | • Check the regular gas flow to the boiler and the air has been purged from the pipes. |
| • Detection or ignition electrode fault | • Check that the electrodes are correctly positioned and free of any deposits | ||
| • Defective gas valve | • Check and change the gas valve | ||
| • Incorrect inlet gas pressure | • Check inlet gas pressure | ||
| • Siphon obstructed | • Check and if necessary change the siphon | ||
| F2 | flame detected with the burner off | • Ionisation electrode defected | • Check the ionizing electrode wiring |
| • Main board defected | • Check the CVBC | ||
| F3 | 100°C Safety thermostat trips | • Flow sensor not active or correctly located | • Check the correct positioning and operation of the flow sensor |
| • No system circulation | • Check the pump and radiator valves present in the system | ||
| F5 | Fan problem | • Tachometer signal interrupted, fan connection | • Check the wiring and fan |
| • Fan damaged, debris in fan | • Check the fan, clean debris | ||
| F8 | No flame after the ignition phase | • CVBC fault | • Check and if necessary change the CVBC |
| • Ionisation probe fault | • Change/clean ionisation probe | ||
| • Mains interference | • Check the earthing | ||
| F9 | No communication between the CVBC and the gas valve | • Incorrect wiring | • Check the wiring |
| • Damaged valve | • Check the CVBC | ||
| • Change the valve | |||
| F10 - F22 | Microprocessor trouble | • Microprocessor operating trouble | • Cut off and restore the electricity supply. If the trouble remains, check and/or change the main PCB |