Did the Koreastar boiler show errors on the display? This means that the self-diagnosis system “detected” a malfunction. All modern heating equipment is equipped with automation – sensors that control the operation of each unit. Sometimes the user does not even need to contact the service center. It is enough to determine the meaning of the code and find the problem.
Features of operation of Koreastar
The name of gas boilers “Koreastar” suggests that they are produced in Korea. But this is not so: they are produced in Europe, taking into account Russian conditions. Double-circuit models work stably with voltage drops in the network up to 15%.
Two heat exchangers provide heating for heating and hot water systems (DHW). Productivity reaches 13,6 liters per minute with a power of 32 kW. The heating capacity is designed for rooms with an area of 240 m².
Some models are equipped with bithermic radiators. They are designed according to the “pipe in pipe” type. At the same time, in one tube there is heating for hot water, in the other – for the circuit. Frost protection provided. The burner is equipped with a flame modulation system, so you can reduce the power at any time. Another feature of the burner is the pressurized type of operation, which makes the boiler quite noisy. You can read more about this in review of gas boilers “Koreastar”.
Error codes and malfunctions
In case of any malfunction in the operation of the boiler, the user must first look at the instructions. Most errors are listed by the manufacturer. It’s just not always clear how to fix them. We recommend restarting the equipment immediately:
- Press the restart key;
- Wait for the boiler to restart;
- Make sure the characters have disappeared from the screen.
If nothing has changed, start looking for a breakdown. The table below shows solutions for different problems.
| Fault codes | What does | How to fix it yourself |
| A01 | The system does not report the presence of a flame. |
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| A02 | A flame was reported, although there was no ignition. |
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| A03 | Overheating technology. Boiler operation is blocked. The temperature is over 90 degrees. | The thermostat has tripped. First of all check it for serviceability. Drain excess air from the system using Mayevsky taps. Run diagnostics:
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| A08/F10 | The heating circuit temperature sensor is out of order. | Checking the sensor, its connections and contacts. In the event of a short circuit (short circuit) or open circuit, a new element is installed. |
| F05 | Incorrect operation of the gas removal system. | View:
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| F11 | Hot water NTC temperature sensor failed. | I got error F11, what to do:
If ignition does not occur when DHW is turned on, inspect the three-way valve that switches heating between circuits. |
| F37 | Low pressure in the circuit (less than 80 kPa). | Make sure the pressure sensor, its wiring is in good condition. Inspect all connections and assemblies for leaks. Any damage is sealed. Turn on water supply to the system. |
| F41 | The movement of the coolant is disturbed. The heat exchanger is overheating. | How to fix the situation:
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| F50 | The electronic board is not working. | Checking grounding, boards for breakdown. It is better to entrust repair and replacement of the control module to a specialist. |
Unfortunately, not all malfunctions of Koreastar heating equipment are displayed as a code on the display. Users complain that the devices are sensitive to voltage drops, which is why the control board often suffers. And this is despite the manufacturer’s assurances of stable operation at any jumps. Therefore, when choosing Koreastar, it is worth add a stabilizer.
Experts recommend annual preventive maintenance of breakdowns. Clean the unit from dirt, scale, conduct a technical inspection.