Ariston boiler, error codes with explanations and examples of repair
In the event of a malfunction of the gas boiler, the indicator gives an error message. Knowing the meaning of the displayed error code, the specialist determines in which direction to look for a malfunction.
Good day or night, dear readers. I am sure that if your gas boiler is "unwell" then you will not leave it alone at night. Swam…. we know! So, to help you with a thermometer, looking at the values of which you can determine "where it hurts"
This thermometer is an indicator on the boiler control panel, and if you know the meaning of the error code that the boiler electronics gives you, then this can greatly facilitate the task of troubleshooting.
It will also not be superfluous to know where and which sensor is located.
Because before you start with error codes, you should know that the "Brains of the boiler" are guided by the readings of various sensors and sometimes a malfunction, not of the boiler, but of the sensor itself, can lead to an error.
Purpose of sensors and where they are located
We look at the pictures, read the inscriptions - here we have collected all the sensors used in the boiler and reporting any error. With the exception of a pressure sensor with a pressure gauge, well, I think everything is clear there. By the way, in some modifications of boilers, an immersion temperature sensor in the DHW circuit - NTCs may not be installed.
The meaning of the boiler error codes Ariston with explanations
In this section I will try not only to announce the entire list, but also to provide additional information on some points known to me, with links to articles on repairing the Ariston Clas boiler.
If something is disturbed in the operation of the boiler: Either you can reset the error with the Reset button and restart it, or this will not work until the malfunction is eliminated.
Error codes are divided into six groups according to the functional units of the device. The first digit of the code just informs which group the corresponding malfunction belongs to:
1. Primary circuit;
2. DHW circuit;
3. ECU - (electronic control unit)
4. Data exchange with peripheral devices; (external sensors, thermostats, etc.)
5. Ignition and flame detection.
6. Air supply and removal of combustion products.
Primary circuit
1 01 - Overheating (Overheating sensor triggered 102 ± 4 ° C.) After cooling down, the error is reset.
Due to scale in the primary heat exchanger, there is insufficient flow of the heating medium, the filter of the heating circuit may be clogged, or problems with the circulation pump.
There is also a very large flame on the burner, the gas valve needs to be adjusted, (done by a specialist) You can close the gas tap, sometimes it helps.
1 02 - Pressure sensor in the CH circuit - Sensor malfunction or insufficient pressure in the circuit. It is impossible to reset, we eliminate the reasons.
1 03 — 104 — 105 — 106 -107 - Insufficient circulation, or insufficient quantity of heating medium.
Possible reasons for what can be done.
- Airiness of the system, it is necessary to remove the air, for this we press the ESC button for more than 5 seconds. The boiler will run the pump for 6 minutes without igniting the flame to remove air. We check the pressure, at least 1 - 1.2 bar, if necessary add.
- Problems with the circulation pump, often the reason for this is the pump control relay
- And of course, slagging of the heat exchanger or filter in the heating circuit, this can also greatly impede good circulation.
1 08 - There is no water in the primary circuit.
Possible reasons for what can be done. Make sure there is water, - check the pressure, add if necessary. We observe - if the pressure drops again for some time (several days or a week), find out the cause of the leaks. We remember about the possible malfunction of the sensors themselves. And we read
I have not seen the following error codes, but they are described in the smart book for servicemen as follows:
1 09
- Overpressure in the primary circuit (P> 3 bar)
1 10
- Temperature sensor at the supply to the CO circuit (NTC1) - no contact
1 11 —
Temperature sensor on the supply to the CO circuit (NTC1) - short circuit
1 12 —
Temperature sensor at the inlet from the CO circuit (NTC2) - no contact
1 13 —
Temperature sensor at the inlet from the CO circuit (NTC2) - short circuit
1 14 —
Outdoor temperature sensor - no contact
1 15 —
Outdoor temperature sensor - short circuit
DHW circuit
These codes also did not occur, especially since it was not necessary to see a boiler working in tandem with a solar plant (solar collector) and a boiler. So the most likely errors are related to malfunction of sensors in the DHW or CO circuits.
2 01 —
DHW flow sensor (NTCs) - no contact
2 02 —
DHW flow sensor (NTCs) - short circuit
2 03-
Tank temperature sensor - no contact
2 04 —
Tank temperature sensor - short circuit
2 05 —
Sensor at the inlet to the DHW circuit (from the solar system) - no contact
2 06 —
Sensor at the inlet to the DHW circuit (from the solar system) - short circuit
2 07 —
Overheating of the solar collector pipe
2 08 —
Low temperature in solar piping
2 09 —
Overheating in the tank (Boiler) Alarm
ECU - Electronic control unit - It is generally better not to go here without the necessary knowledge. The most that can be done to the layman is to reset with the RESET button. Check the reliability of the contacts of the connected loops and wires. And also such a simple way as to turn off the boiler from the network and turn it on after a few minutes. Sometimes it can help. (See error 304) For the rest, leave it to the experts. After all, you will not flash the EEPROM (Memory chip, in case it flies)
However, there is another option, through the menu, manually set the necessary parameters if a failure occurs. I once did this, after the owner of the boiler filled the water control board, the firmware went off, the boiler was not controlled and it was not clear how it behaved, for example, when the temperature setting knobs were turned on the display, it showed all sorts of rubbish. The only thing that is needed for this is to know how to enter the service menu and what parameters need to be set. I copied the necessary parameters from my, the same working boiler, also going into the service menu and rewrote all the parameters with a pen on a piece of paper. Which I then put in the damaged cauldron. But by the way, this is already a topic for another article - maybe someday.
In the meantime, just the error codes of the ECU.
3 01
Display failure, ROM problems
3 02
GP exchange error - GIU
3 03
Internal ECU error
3 04 More than five resets within 15 minutes - Here we mean more than 5 pressings of the RESET button, to reset error 304, simply turn off the boiler from the mains and turn it on again.
3 05
Internal ECU error
3 06
Internal ECU error
3 07
Internal ECU error
Data exchange with external devices
Well, this is in case your boiler is connected to GSM or the Internet. (in general, you can skip past)
4 01
Communication error between modem and bus
4 02
GPRS / GSM modem error
4 03
Modem Sim Card Error
4 04
Exchange error between modem and ECU
4 05
Modem error
4 06
Modem error
4 07
Room temperature sensor - no contact
4 08
Room temperature sensor - short circuit
Ignition and detection
(And this is what you can really encounter) By the way, some of these and not only errors can occur when the mains voltage is low or poor grounding. Use a stabilizer. Sometimes the “polarity” in the outlet affects the boiler operation, try to turn the power plug in order to change the phase and zero on the wire.
5 01
- Lack of flame during ignition.
Out of gas, this time ???? (they forgot to open the tap after a long trip) If there is still gas, and the boiler even ignites, and then goes out with an error 501, then check the ionization electrode (Flame sensor) Make sure it is clean, not bent, (see the illustration at the beginning of the post) the wire from it is not interrupted and reaches the board with which it successfully connects.
5 02 — Flame detected with gas valve closed
Possible reasons what can be done
If there is actually no flame, but the boiler gives this error, they say, “I haven't opened the gas yet, but everything is already burning there,” then the reason is in the ionization electrode, it may be wet and sees something that is not there. The second thing that could be a malfunction of the gas valve. Work for specialists.
The following four errors have a general description: Potential problem in the ionization electrode, gas pressure, or air flow, flue gas outflow. It happens that in cold weather the condensate on the chimney freezes and prevents the movement of air into and out of the boiler. Therefore, correct installation of the chimney with a slight downward slope to allow condensation to drain off.
5 P1 First ignition attempt unsuccessful
5 P2 Second ignition attempt unsuccessful
5 P3 Flame separation during operation
5 P4 Three flame separations in one working cycle
6 01
The flue overheating sensor has triggered (only in devices with an open combustion chamber, it is located in the chimney area)
6 04
Fan speed too low or Hall sensor malfunction.
6 08 — The pressure switch did not work, but the fan turned on (we check the pressure switch and all its connections)
6 P1 or 6P2 - Delay of closing the contacts of the air pressure switch.
You can also find such problems with hot water supply due to sensors.
Error H45 - Moreover, the value of 45 may differ depending on the water temperature. - reason, NTSc sensor.
Unstable operation of hot water supply, the boiler either ignites or does not, everything is normal for heating. - cause of the flow meter (water flow sensor) Details about all this, as well as about a malfunction of the reset valve
Well, perhaps that's all, except that it remains to give a link to the article where the reason is described when And suddenly it will come in handy!
