Master Gas Seoul Gas Boiler Errors

Error A2 - Fan failure. The electrical circuit may be broken. It is necessary to check it and contacts. The fuse has blown. It is required to replace it. Breakage of the fan. You must install a new one.

Error A3 - Pump failure. It is necessary to check the electric circuit of the fan. Possible damage to the pump, replacement is required.

Error A4 - It appears when the thermostat trips. Breakage of the thermal relay itself. In normal operation, it is closed, if the temperature is less than 95 degrees. In case of breakage, a new one is required. Problem with the electrical circuit of the overheating sensor. It is necessary to check the circuit, and the contacts.

Error A5 - The coolant pressure is below normal. In the heating system, air jams appeared. To eliminate the need to eliminate the air, and using a special valve to pump water into the heating system to establish the recommended factory manufacturer pressure. Breakdown of the water pressure sensor installed in the heating system. Replacement is required. The electrical circuit between the pressure sensor and the circuit board is damaged. It is necessary to check the contacts in the connectors, and the wires. If necessary, replace.

Error A6 - This error appears in the event of a problem with the ignition. There is no gas supply. It is necessary to make sure that the shut-off valve on the gas pipeline is open, if necessary, it should be opened. If the system is powered by liquefied gas, you need to make sure that the pressure in the cylinders corresponds to the norm. If these actions did not help, you should contact the gas service. The spark plug is broken. Replacement is required. The electrical circuit of the spark plug is damaged. Check and fix. Maybe the spark plug is dirty. It must be cleaned of dust and degreased. Breakdown of the ignition transformer. Replacement is required. The ionization plug is damaged. Replacement is required. The electrical circuit of the ionization candle is damaged. Check and fix. Perhaps the ionization plug is dirty. Must be cleaned of dirt. The burner is heavily soiled. It is required to clean it.

Error A7 - Breakdown of the gas valve of the boiler Master Gas Seoul. Possible breakage of the gas valve modulator coil. Replacement is required. The electrical circuit between the coil and the board is damaged. Check and fix.

Error A8 - There is a residual flame in the system or the flame does not extinguish, although the gas valve is already blocked. It is necessary to check the diaphragm located inside the gas valve. If it is damaged, the valve must be replaced.

Error A9 - Start anti-freeze cycle. Switching on and off is done manually.

Error AA - Overheating of the coolant over 95 degrees. The sensor has tripped. Heating circuits are manually closed. It is necessary to open them so that the coolant begins to circulate in the system. It is necessary to check the filters for contamination. Perhaps they were hammered. Pump failure. Inspection and replacement are required. The three-way valve is broken. A replacement is necessary. The NTC flow sensor is defective. You need to install a new one.

Error Ab - This fault indicates that the flow temperature sensor installed in the heating system is broken. Damage to the coolant temperature sensor. Replacement is required. Damaged electrical circuit between the temperature sensor and the circuit board. It is necessary to check the chain, the contacts, and if necessary, remove it.

Error Ac - This fault indicates a failure of the hot water temperature sensor. The sensor is broken. Replacement is required. The electrical circuit between the temperature sensor and the circuit board is damaged. Check the chain and contacts. And the need to eliminate.

Error AE - This fault indicates a breakdown of the air pressure switch. Chimney obstruction. The air supply channel may also be clogged. Set the cause and fix it. The electrical circuit of the pressure switch is damaged. Check continuity and contacts. If necessary, eliminate. The pressostat itself is broken. In normal operation, it should be closed if the pressure drop is more than 130 pascal. If there is a problem in it, a replacement is required.