Do you use a Celtic gas boiler? Then you probably appreciated its effectiveness and adaptability to operating conditions. Sometimes codes appear on the display of the device. They can indicate both the current operating mode and a breakdown in the system. To find out the exact value, see the instructions. Error decoding and troubleshooting methods are detailed in our article.
The principle of operation of Celtic boilers
The Celtic dual-circuit appliance is capable of heating an area of up to 350 m². If you connect several boilers according to the cascade principle, then there are more rooms.
The heat exchanger for the heating system is made of copper. Secondary plate radiator - stainless steel. Thanks to this, the equipment is reliable and durable. Closed combustion chambers are equipped with fans with automatic speed control. The node responds to changes in the system and reduces or increases speed.
The circulation pump is equipped with protection against clogging and jamming. It works stably when the water pressure drops to 0.15 Bar and gas to 0.01 Bar. The security system includes monitoring sensors. There is a built-in voltage regulator.
Management - electronic and remote using the remote control. The unit operates almost silently, the noise level does not exceed 37 dB.
Errors and malfunctions
It happens like this: a minute ago the Celtic boiler regularly heated water, when suddenly the work stopped, and a malfunction code was displayed on the display. See the code breakdown below to find out how to fix the cause of the failure.
Error code | What does it mean | How to fix the problem |
A1 | Communication failure between the remote control and the electronic board. | Check the connections, contacts between the control board and the interface board. |
A2 | The fan is out of order. | Diagnostics of the fan, its motor, wiring. Replacement of failed parts. |
A3 | The circulation pump does not function. | Inspect its impeller for blockage, unlock the work. Install a healthy item. |
A4 | The safety thermostat has tripped. The temperature in the circuit exceeded 110 degrees. | There may not be enough air in the expansion tank. To download, turn off the equipment and drain the water. Then start the pump. Wait until the pressure rises to 1 Atm.
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A5 | There is not enough fluid in the system. | Make sure that there are no leaks in the pipe, connections. Inspect the boiler components as well as the three-way valve. If everything is in order, increase the pressure in the circuit to 1 Atm. Turn on recharge. |
A6 | Problems with fuel supply. Too weak or strong pressure in the line. There is no gas supply. | What to do:
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A7 | The gas valve is out of order. | Inspect the cables and connection plugs. Turn the valve off and on again. If the part is defective, replace it. |
AA | The temperature sensor has fired. Overheating occurred over 95 degrees. | Checking the sensor for serviceability. Descaling the heat exchanger with reagents. Enable recharge. |
Other issues
There are also such malfunctions in the operation of the Celtic boiler:
- The device does not heat water above 60 degrees. It is necessary to clean the filters and gas reducer;
- When you turn on the device is very noisy, the speaker code may be displayed. Pump air into the system, make sure that there are no foreign objects in the pump blades. Descale the radiator. Also check the connections of the temperature sensor, the condition of the cables;
- If the boiler is noisy when collecting cold water and an error A5 is issued, then add coolant to the circuit.
Now you know how to deal with problems without calling the wizard. But sometimes, specialist help is still needed. For example, when replacing a control board, one cannot do without it. Be attentive to your technique, then you can avoid serious damage.