Error codes and malfunctions of Arderia gas boilers

In heating technology, control sensors are provided. They fix malfunctions that occur with Arderia boilers. The control module receives a signal, after which it blocks the operation of the device. How in this case to restore the heating of the circuit? Stick to our recommendations.

The device and principle of operation of the Arderia boiler

Equipment “Arderia” is available in two variations: with one bithermic heat exchanger or with two radiators. Bithermic has a tube-in-tube design. Its principle is that at the same time there is heating of water for heating and hot water supply (DHW).

The second option includes two nodes, the heating in which takes place separately. The primary radiator is made of copper and the secondary one is made of stainless steel. The circulation of the coolant in the system is forced thanks to the Grundfos pump. Its rotor does not come into contact with the liquid, so it lasts longer than usual.

The removal of combustion products is also forced. There is a fan above the burner. The coaxial chimney consists of two tubes. Clean air comes in one, smoke is removed through the other. The electronic board includes an additional chip that serves as a voltage regulator.

Electronic and remote control. Remote control available. More details on the page “Overview of Arderia gas boilers».

Error Codes

The Arderia gas boiler works, as a rule, stably. But this does not mean that the technique does not need maintenance. The accumulation of scale, debris, soot leads to system malfunctions. Sometimes the causes of malfunctions are external factors: pressure drops in the line, power surges in the network.

As soon as you notice a fault code on the display, look at the instructions. The first thing the manufacturer recommends is to reboot. If after switching on the error is displayed again, look for its value in our table.

Error CodesWhat doesHow to fix it yourself
A1The pressure sensor has shorted out. Problems with the removal of combustion products.
  • Checking gas fittings for blockage;
  • Chimney inspection. Clearing ice, snow, debris. If the correct height of the pipe is not observed, wind blowing is possible. It must be at least 50 cm.
A2Lost traction.
  • Make sure the fan is working properly. Clean its blades of debris;
  • Clean the chimney from the inside and outside. In winter, the outer outlet may become overgrown with ice;
  • Check for traction. Bring a lit match to the control window. The flame deviated – there is thrust, it burns evenly – no.
A3The pressure sensor worked before the pump turned on.
  • Inspect the sensor and its wiring. Clean the contacts when oxidized with fine sandpaper;
  • Run pump diagnostics.
A4The safety thermostat has tripped. Boiler overheating.How to restore work:
  • Open shut-off valves;
  • Clean and wash the filters from clogging;
  • Unlock, clean the pump impeller, adjust the speed;
  • Diagnose the three-way valve, as well as the flow sensor, its connections;
  • Defective parts must be replaced.
A5The pressure in the heating system drops.
  • Bleed excess air through Mayevsky’s taps;
  • Unlock or replace pump if broken. Set a high speed, make sure the integrity of the impeller;
  • Inspect pipes, connections, radiators for leaks.
A6Ignition problems.How to repair:
  • Wait until the gas supply to the pipeline is restored;
  • Repair the fuel valve;
  • Diagnostics of the ignition transformer, as well as the ionization sensor.
A7Relay closed, fuel valve failed.Check for serviceability of the valve, relay, contacts. Electronic board failure.
A8The flame in the burner did not go out, although the supply valve was closed.Inspect the valve diaphragm. If deformed or damaged, install a new element. To replace the control module, contact a specialist.
A9The system signals a temperature drop of up to 5 degrees.If there is no automatic start, turn on the device yourself.
AAHeat carrier overheating. The readings went over 100 degrees.
  • Unscrew the valves;
  • Clean filters from debris;
  • Make sure the pump is working;
  • Diagnostics of the three-way valve and flow sensor.
AND YOUThe thermostat has failed.Ringing of the sensor contacts for a short circuit, open circuit. Installation of the working part.
AEThe chimney is blocked.Remove foreign objects from the pipe. If the pipe is deformed, a new structure must be installed.

Other problems

What should I do if there is a clear malfunction of the boiler, but the error code is not displayed?

There is a smell of gas in the room. Close the shut-off valves and call the gas service for a check.

After turning on the appliance, the fan started to rotate, but burner does not start:

  • Voltage fluctuations in the network. Measure readings with a voltmeter. If instability is a frequent “guest” in your home, connect an additional stabilizer;
  • Check the tightness of the combustion chamber, check the condition of the chimney;
  • Examine the pressure switch. When it breaks, it needs repair.

Yellow flame in the burner. Clean the burner nozzles from soot, soot, dust. Adjust gas valve settings.

For a long time no hot water. If you just started the boiler, wait until it warms up.

Before starting the heating equipment, carefully read the operating instructions. Often the causes of problems are incorrect settings of the regulators.

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