Service Error Codes

1.  Put the boiler into standby mode (the power icon lights up red).
2. Turn off the boiler’s circuit breaker in the electrical panel for at least 1 minute. 
3. After 1 minute, reconnect the boiler to the power supply and turn it on. 
4. If the error persists, use the error instructions provided below.

Possible Causes:

1. Insulation failure of the cable.
2. Moisture accumulation on the live parts of the boiler.
3. Breakdown of one or more heating elements in the block to the protective casing.

Troubleshooting:

1. Turn off the boiler by switching off the circuit breaker in the electrical panel.
2. Contact an authorized service center.

Warning: When error E1 is displayed, there is a high risk of electric shock. The use of the boiler is strictly prohibited until the causes of the error are eliminated.

Possible Causes:

1. One of the valves under the boiler is closed, or the automatic thermostatic valve (thermostatic head) has closed.
2. The coarse filter located at the boiler inlet is clogged.
3. Presence of air in the heating system.
4. Faulty automatic air vent. 
5. Voltage in the electrical system is below permissible (the circulation pump has stopped). 
6. Voltage in the electrical system is above permissible (the fuse has blown).
7. Absence of one phase in a three-phase boiler connection.
8. Water flow through the boiler is less than 3.7 liters per minute.
9. Leakage of the heating medium from the heating system (low level).
10. Contamination or malfunction of the flow sensor.
11. Faulty three-way valve (with DHW system connected). 
12. Faulty circulation pump.

Troubleshooting:

1.  Ensure all heating system valves and DHW circuit valves are open. 
2. Ensure the three-way DHW circuit valve switches freely.
3. Ensure the coarse filter is not clogged. 
4. Visually inspect the heating system and DHW circuit for leaks. If necessary, fill the system to the recommended pressure of 1.2–1.5 bar. Monitor the pressure using the boiler gauge. 
5. Check the flow of the heating medium through the boiler using service menu parameters P1, P2, and P3. 
6. Remove air from the heating system and DHW circuit.
7. Check the voltage in the network (it should comply with the standards in your region).
8. Check the condition of air vents in the heating system and, if necessary, remove air from the heating system and DHW circuit. 
9. Contact an authorized service center.

Possible Causes:

1. Lack of connection between the sensor and the boiler control unit.
2. Faulty sensor.

Troubleshooting:

•  Contact an authorized service center.

Warning: Using the boiler is prohibited until error E3 is eliminated.

Possible Causes:

1.  Lack of connection between the sensor and the boiler control unit. 
2. Faulty sensor.

Troubleshooting:

• Contact an authorized service center.

Note: The boiler is allowed to operate with error E4.

Possible Causes:

1. Lack of connection between the sensor and the boiler control unit. 
2. Faulty sensor.

Troubleshooting:

•  Contact an authorized service center.

Warning:

• The boiler operation in DHW mode is prohibited. 
• Boiler operation is allowed only in heating mode.

Possible Causes:

1.  Faulty control unit. 
2. Faulty heating medium temperature sensor.

Troubleshooting:

1.  Turn off the boiler until the temperature drops to 65°C or below, then restart it. 
2. If the error persists, contact an authorized service center.

Note: Error E6 disappears automatically when the heating medium cools to 65°C. When error E6 occurs, heating stops.

Possible Cause:

• The temperature in the heating medium dropped below +5°C. Consequently, the frost protection system automatically activates, and the AFr mode is displayed. The application sends a message in the form of error E7.

Troubleshooting:

•  The boiler automatically switches to heating mode and heats the system to +30°C, after which it automatically returns to standby mode.

Note: Information about error E7 in the attached video differs due to the boiler program update.

Possible Cause:

• Boiler control system failure.

Troubleshooting:

•  Reset parameter P10 to factory settings in the service menu.

Possible Causes:

1. The boiler’s power was turned off by the circuit breaker in the panel with a violation of instructions. The boiler was disconnected from the power supply without first being put into standby mode. 
2. General power system failure. The boiler’s power was turned off with a violation of instructions. 
3. Unreliable connection of the touch display cable to the boiler control board. 
4. Global software failure.

Troubleshooting:

1.  Remove the boiler cover and check the connection of the touch display cable to the boiler control board. 
2. If the error does not disappear, contact an authorized service center.

Possible Cause:

• The boiler overheated, and the high-temperature safety thermostat was triggered.

Troubleshooting:

1. Cool the boiler to a temperature of at least 65°C.
2. Remove the boiler cover and press the button on the high-temperature safety thermostat.
3. If the error does not disappear, contact an authorized service center.