CELTIC DAESUNG Gas Boiler Error Codes

Error A1 - Closing of the air pressure sensor. The chimney penetrates the air from the outside. There was a blockage of the flue. Perhaps the icing hole was frozen.

Error A2 - The fan runs at a low speed. Possible poor connection. The wiring connection was broken. The fan rotates at an insufficient speed (foreign objects enter). If necessary, replace.

Error A3 - Circuit pump fault. The pressure sensor is activated before starting the pump. Probably clogging the pressure sensor. Check the pump for service and replace if damaged.

Error A4 - The sensor is triggered for overheating at 110 degrees. All shut-off valves of the heating system in the closed position. The heating circuit filter is dirty. There is no rotation of the circulation pump. The 3-way valve has a malfunction. The hot water supply (NTC) sensor is damaged. There is probably no air in the expansion tank. It is required to turn off the appliance, close all the faucets from below and drain the water. After that it is recommended to open the lid and pump the air pump. This procedure occurs until a pressure of 1 atm is established. In addition, it is necessary to inspect and, if necessary, clean the back filter. Then open the valves and start the unit.

Error A5 - Decrease in pressure of the coolant. The heating system has insufficient water. There is air in the heating system. There may be a malfunction of the circulation pump. The efficiency of the circulation pump is present, but the rotational speed is weak or its impeller is damaged. The sensor pressure of the circus. pump has a breakdown. The heating system has a water leak. To solve the problem, it is necessary to raise the pressure to 1 atm. It is necessary to make sure that there is no leakage of the coolant and there is no leakage of the three-way valve.

Error A6 - Malfunction of the ignition system. No ignition. Chimney blocking is possible. Low gas pressure. Gas valve malfunction. Damage to the ignition transformer. The flue is in the blocking mode. Check the gas filter and the gas reducer of the Celtic boiler. They may have pollution. If the area of the heated room is large, it is recommended to install an additional pump.

Error A7 - Incorrect operation of the gas valve. Closes the gas valve relay. The control module is corrupt. You may need to replace the electronic control card.

Error A8 - Presence of residual flame. There is no attenuation of the flame. The chamber has a residual flame, but there is no voltage on the gas valve. Defect of the diaphragm of the gas valve. Replace the control unit if replacing the gas valve does not solve the problem.

Error A9 - Freezing. The boiler water temperature dropped to five degrees.

Error AA - Boiling. Occurs with all closed heating circuits. The heating system filter is dirty. The circulation pump is in a faulty condition. The three-way valve is defective. The NTC flow sensor can not function properly.

Error AB, AC - Thermostat faulty. The thermostat is in a short-circuit condition. The thermostat and the contacts have an incorrect connection.

Error AE - The chimney is locked. Contact with foreign objects in the flue. Deformation of the flue has occurred.