Repair of gas boilers Ferroli: how to find and fix an error in the operation of the unit by code

The basis of autonomous heating systems is most often a reliable gas unit from a responsible supplier. But even the products of companies that are highly rated for the quality of their equipment have problems. Sometimes it is necessary to repair gas boilers Ferroli, not only gas workers, but also the owners themselves can cope with it.

Devices of this brand do not differ much from each other according to the principle of action. Therefore, their problems are typical. Ways to solve the malfunctions are also well investigated.

We will talk about how to correctly identify a malfunction. We will help to sort out the problems and correctly decrypt the error code displayed on the electronic display of the unit. Compliance with our recommendations will provide home craftsmen with a positive outcome from the effort.

Fault indication on different models

Ferroli boilers are equipped with a self-diagnosis system and, in the event of an emergency, give the user an error code. Knowing the type of malfunction, you can quickly find the cause of its occurrence. Many failures do not require special knowledge to fix them.

All problems that arise during the operation of Ferroli boilers, the manufacturer conditionally divided into 2 categories:

• Critical errors causing a complete block. Indicated by the letter “A” before the code. If such a malfunction occurs, it is necessary to fix the problem and restart the boiler by pressing the “reset” or “reset” key.
• Problems causing a temporary shutdown of the boiler or one of its components. Indicated by the letter “F” before the code. Automation expects a normalization of the situation, after which it will restart the boiler.

Error code information can be displayed on the LCD or on the remote control. For older models, you can find out the type of breakdown by indicators.

If the boiler does not have an LCD display, then the type of error can be recognized by the flashing lights. For each problem, a unique combination of indicator behavior is written in the user manual.

Also, sometimes a code appears on the screen starting with the letter “D”.This is technical information that warns the user that the boiler is switching from one mode to another.

The list of errors gas boilers Ferroli

Below is a list of faults for gas boilers Ferroli, sorted by increasing error code. For each problem, ways to solve it are proposed, starting with the easiest.

Error A01 - the burner did not light. A common problem, as there are many reasons for its occurrence:

• Lack of gas. It must be checked that all stop valves are open. If the gas has been connected recently, then before starting the boiler, bleed air.
• Insufficient ignition power. It is necessary to adjust this indicator, according to the instructions in the user manual.
• Gas valve malfunction. It is possible that the wiring was incorrectly connected or there is a loop defect. There is also the possibility of a malfunction of the valve itself, then it will need to be replaced.
• The problem with the ionization electrode. You need to check the nominal clearance, which should be about 3 mm, make sure the cable is working and, finally, clean this part from dirt.

If all else fails then the control board error remains. Although this is an unlikely event, since the self-diagnosis identifies problems with the boiler electronics well.

Insufficient pressure of the liquefied gas can be caused by the onset of cold weather. This happens if the gas tank is filled with a “summer” mixture. The boiler will have nothing to do with it

Error A02 - a signal about the presence of flame when the burner is off. The most likely problem is current leakage from the ionization electrode circuit. Check wiring for physical damage and short circuit. Also, a malfunction of the boiler board may be the cause of the breakdown.

Error A03 - overheating of the boiler. The most likely source of the problem is poor circulation of the coolant in the circuit.

This happens most often for three reasons:

• clogging;
• airing system;
• malfunction of the built-in circulation pump.

In any of these cases, strained pump operation will be heard. If the pumping of water is normal, then you can check the temperature sensor itself and the wiring to it.

Error F04 - the smoke thermostat has worked. High exhaust temperature means the heat exchanger is dirty. Also, the sensor can work when the effect of overturning traction occurs.

Mostly the malfunction is due to problems with gas boiler chimney. This can be either structural miscalculations (a small pipe diameter or a strong wind load at the outlet), or a narrowing of the passage due to the ingress of foreign objects or the accumulation of a soot layer. Therefore, first of all, you need to check the smoke exhaust path.

The calculation of the chimney parameters for a gas boiler must be taken seriously. Alteration will take a lot of time, during which there will be no heating

You also need to look at the temperature setting for the sensor. It must match the boiler model. And finally, failure of the sensor itself is possible. In this case, it will have to be replaced.

Error F05 - fan malfunction. Depending on the model, the malfunction is determined either by the readings of the fan load or by opening the contacts of the pressure switch.

You need to check the following nodes:

• Chimney. The passage can be greatly narrowed due to a design error, a foreign object or an incorrectly selected diaphragm. In this case, a narrowing of the air flow occurs and the pressure switch trips.
• Fan. It happens that it does not start at the start of the ignition. Then you need to check the wiring, contacts or motor. The bearing may also fail, then the fan will make a hum and its blades will rotate more slowly.
• Pressure switch. Contacts may become loose or the device itself may break.

Error A06 - the fire goes out immediately after ignition.

There are two almost equally likely causes of the error:

• Insufficient pressure in the gas line.It is necessary to check the locking equipment. If it is fully open, and the pressure is bad, then you need to contact the gas supplier.
• The minimum pressure value for the gas stream is set too low. Need to re-calibrate.

Error F07 - one of the parameters of the electronic board is incorrectly set. If the automation itself can not cope and the gas boiler Ferroli does not start, then you need to climb into the menu and check the settings.

Modern Ferroli boiler models have an advanced settings system. Sometimes the user is very interested in modeling, which leads to system errors

Error F08 - overheating of the heating water heat exchanger (OV). If the temperature in the circuit is 100 ° C or higher for 5 seconds, this fact will be recorded. Frequent repetition will cause error A03. Situation F08 does not appear on the screen and does not stop the process. However, it remains in the event register.

Error A09 - a problem with the gas valve. The simplest situation is related to a power failure. In this case, you need to check the contacts or change the wires. An open or short circuit inside the valve is also possible.

Error F10 - malfunction of the temperature sensor on the water supply to the circuit. There are 3 possible scenarios:

• Opening contacts. Disconnect the connectors and then reconnect them tightly.
• Open wire or short circuit. Need to ring the wire. If you confirm the problem, you will have to replace it.
• An open inside the NTC sensor itself. It must be removed and tested for resistance.

Error F11 - malfunction of the temperature sensor of hot water supply. The steps are the same as with error F10. The main difference between events F10 and F11 is that in case of a problem with the hot water supply, the boiler will continue to work only in heating mode. And with problem F10, the boiler will stop.

The resistance of a standard semiconductor temperature sensor (NTC) depends on its heating. Using an ordinary ohmmeter, you can determine its suitability for further work

Error F14 - malfunction of the temperature sensor at the water inlet to the heat exchanger. The situation is similar to a fault with code F10.

Error A16 - a problem with the gas valve. It occurs if the flame is not extinguished within 5 seconds after the command to stop the gas supply. Usually this situation is caused by a problem with the valve's electrical system, as a result of which it will need to be replaced.

The most common problem causing a gas valve to break is an open in the inductor. In this case, it is easier to make a complete replacement of the part than to look for a breakdown place.

Error F20 - the problem is related to the overall quality control of the combustion process. At the same time, the boiler does not stop.

A difficult situation, since there can be many reasons for its occurrence:

• Faulty smoke exhaust system. It is necessary to act as with errors F04 and F05.
• Malfunction or incorrect operation of the ionization electrode. You need to check the nominal clearance, which should be about 3 mm, make sure the cable is working and, finally, clean this part from dirt.
• Gas valve malfunction. It will have to be replaced.
• Faulty control board. Replacement.

Error A21 - if situation F20 occurs 6 times within 10 minutes, the boiler stops.

Error F34 - insufficient mains voltage. For different models, a different threshold is provided, but usually a signal about poor current quality occurs at 170-180 V. Operation with such network parameters leads to a risk of breakdown of the boiler electronics.

In order to ensure the safety and durability of expensive equipment, it must be taken as a rule that a gas boiler from Ferroli or another manufacturer is not included in the circuit without stabilizer. Sometimes in places where power outages often occur, it is advisable to install a battery system to support autonomous power.

The gas boiler is connected to the network through a voltage regulator.If the house has a lot of expensive electronics, then it may be better to install an input stabilizer

Error F35 - The current frequency is set incorrectly. The boiler electronics operates at a frequency of 50/60 Hz. The current value of the mains must be set in the menu.

Error F37 - opening the contacts of the pressure switch for 5 or more seconds. If the value becomes less than 0.8 bar, the boiler stops.

This situation occurs in two cases:

• A leak has occurred coolant. It is necessary to check the entire circuit for leakage. After eliminating the problem, the system should be energized to the desired pressure.
• Possible pressure sensor failure. If so, then it will have to be replaced.

Error F39 - a problem with the street temperature sensor. To provide weather-dependent regulation of the heating, an outdoor thermometer can be connected to the boiler. However, this creates another prerequisite for a malfunction - if the signal is lost, then this error occurs.

As with all temperature sensors, it is necessary to check the contacts, ring the wire and test the thermostat itself.

Error F40 - too high pressure in the heating system (occurs in closed circuits). Need to check the pressure. If it is really high, then it is necessary to lower it to a value of about 1.5 bar and check the operation of the safety valve. Most likely, the problem is in it.

If the pressure was normal (the exact value at which the boiler stops) can be found in the operation manual), then the problem is in the sensor. It needs to be replaced.

The membrane tank and valve (left) are located inside the boiler. With increasing temperature, the volume of water increases, as a result, the pressure rises and the fuse blows, dumping the excess coolant outside the circuit

Error A41 - there is no change in the temperature of the heated water. The temperature sensor could simply move away from the pipe or there could be problems described for error F10.

Error F42 - the difference in the readings of the water temperature sensor in the circuit and the overheating sensor is more than 12 ° C. This means that one of the devices gives a significant error, which can lead to failure (or vice versa - false operation) of emergency mechanisms.

You can determine the faulty thermistor using an ohmmeter and resistance table, or you can simply replace both sensors with new ones.

The immersion temperature sensor is fixed in the pipe using threads. Its wires are connected to the control unit using a standard connector. Therefore, when replacing, nothing will have to be soldered

Error F43 - overheating of the heat exchanger. The situation may be caused by the following problems:

• The position of the stop valves does not correspond to the gas pressure. In this case, excessive heat generation occurs in the combustion chamber. It is necessary to set the correct boiler settings.
• The permissible heating rate of the heat exchanger is underestimated. You need to check its value in the menu.
• Poor water circulation in the circuit. The reasons and actions are the same as with error A03.
• The temperature sensor is defective. It is necessary to check its connection or replace it.

Error F47 - lack of a signal from a pressure switch in the heating circuit. First you need to check the contacts, then ring the signal wire from the sensor to the board. If they are OK, you will have to replace the relay.

Error A48 / A49 - The problem of the gas valve in the electrical part. There are two possible reasons: a breakdown of the valve itself (it is necessary to ring its coil) or a control board. A replacement part will be required.

In the case of a board, a reboot may help. If the boiler after that still started working, then you need to understand that this is a temporary solution, since the aging of the capacitors on the board has begun.

The electronics of gas boilers can be repaired at computer repair centers. The main problems with the boards and sensors are the same.

Error F50 - the gas valve circuit is open or the current strength on the modulation coil is below the minimum threshold.The causes of the malfunction and the solutions are the same as for error A48.

Error A51 - a long period of extinction of the flame of the burner. The causes of the problem and the steps to resolve them are the same as the error F20.

Original and compatible parts

If a component of the boiler breaks down, if it cannot be repaired, a replacement problem arises. Ferroli equipment is not so common to be sure that you can quickly find the original part. However, many sensors and tubes have a universal format, in which case you can purchase products from a third-party manufacturer.

For Ferroli boilers, the original spare parts are as follows:

• control board;
• gas valve;
• ignition and combustion unit;
• feed unit (tap);
• chimney fan;
• display and control knobs;
• heat exchanger (original mount);
• expansion tank.

When replacing a make-up tap, you must know the model of the boiler, as Ferroli has two very similar varieties of this part.

The circulation pump, safety valves, temperature and pressure sensors, pressure switch, flow switch, wiring, insulation elements, anodes can be purchased compatible. But it is important that their specifications coincide completely.

Conclusions and useful video on the topic

An example of solving an elementary problem in the event of a boiler breakdown associated with an error in the readings of the air pressure switch. Fast repair on your own:

Cleaning the flue system with a vacuum cleaner:

You can repair a Ferroli gas boiler yourself if you know the type of error and the ways to resolve it. However, it should be remembered that gas equipment is an element of increased danger. Therefore, all maintenance and repair work is best entrusted to representatives of the gas service, with which a contract is concluded.

In the block below you can share your own experience in cleaning and restoring the functionality of gas boilers from an Italian manufacturer. It is possible that you have useful information that is worth sharing with site visitors. Share information and photos on the topic of the article, please ask questions.