Ariston Water Heater Error Codes List
Error codes and diagnostics of Ariston water heater, boiler
In the event of a malfunction, all LED indicators on the control panel flash. To activate the diagnostic function, press and hold the on/off button for 5 seconds. The LED indicators corresponding to the error will flash (refer to the table below for LED indication meanings in case of error).
Errors in Ariston Velis series water heaters
1. Basic version
|
Fault Code |
Description of the error | Action |
| 40° | Electronic board malfunction |
Turn the water heater off and on using the ON/OFF button. Check the main board for condensation. Check if the display board is working properly. |
| 40-60° | Faulty electronic board (NFC) |
Check if the display board is working properly. Replace the display board. |
| 60° |
Open circuit or short circuit of temperature sensor NTC1/NTC2 - water heater outlet tank |
Turn the water heater off and on using the ON/OFF button. Check temperature sensors NTC1/NTC2 for condensation. Check temperature sensors NTC1/NTC2 for open/short circuit. |
| 80° |
Water overheating detected by a separate sensor (more than 105°C) - water heater outlet tank |
Turn the water heater off and on using the ON/OFF button Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| 70-80° |
General overheating. Average temperature of temperature sensors NTC1/NTC2 is 12°C higher than the set temperature - water heater outlet tank |
Turn the water heater off and on using the ON/OFF button. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| 60-70° |
Low water heating rate - water heater tank outlet |
Check the power supply voltage. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| 60-70-80° |
Lack of water - water heater tank leaving |
Turn off the water heater using the ON/OFF button. Fill the water heater with water. Check the serviceability of the safety valve. Check for the presence of a water intake tube in the outlet tank. Clean the heating element from limescale and salt deposits. Turn on the water heater using the ON/OFF button. |
| 50-60° |
Open or short circuit of temperature sensor NTC1/NTC2 - incoming water heater tank |
Turn the water heater off and on using the ON/OFF button. Check temperature sensors NTC1/NTC2 for condensation. Check temperature sensors NTC1/NTC2 for open/short circuit. |
| 50-80° |
Water overheating detected by a separate sensor (more than 105°C) - incoming water heater tank |
Turn the water heater off and on using the ON/OFF button. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| 50-70-80° |
General overheating. The average temperature of temperature sensors NTC1/NTC2 is 12°C higher than the set temperature - incoming water heater tank |
Turn the water heater off and on using the ON/OFF button. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| 50-60-70° |
Low water heating rate - incoming water heater tank |
Check the power supply voltage. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| 50-60-70-80° |
Lack of water - incoming water heater tank |
Turn off the water heater using the ON/OFF button. Fill the water heater with water. Check the serviceability of the safety valve. Check for the presence of a water intake tube in the incoming tank. Clean the heating element from limescale and salt deposits. Turn on the water heater using the ON/OFF button. |
| 40-50-60° | Anti-scale function activated |
Turn off the water heater using the ON/OFF button. Clean the heating element from limescale and salt deposits. Turn on the water heater using the ON/OFF button. |
2. Top version
The display shows the corresponding error code. Refer to the table below for a detailed description of the problem.
|
Fault Code |
Description of the error | Action |
| E 01 | Electronic board malfunction |
Turn the water heater off and on using the ON/OFF button. Check the main board for condensation. Check if the display board is working properly. |
| E 04 |
Open or short circuit of the active anode |
Turn the water heater off and on using the ON/OFF button. Check the active anode for open/short circuit. |
| E 09 | More than 5 reboots within 15 minutes |
The number of reboots has been exceeded (maximum 5 RESETs in 15 minutes). Wait 15 minutes. |
| E 61-62 | Faulty electronic board (NFC) |
Check if the display board is working properly. Replace the display board. |
| E 10 |
Open circuit or short circuit of temperature sensor NTC1/NTC2 - water heater outlet tank |
Turn the water heater off and on using the ON/OFF button. Check temperature sensors NTC1/NTC2 for condensation. Check temperature sensors NTC1/NTC2 for open/short circuit. |
| E 11 |
Water overheating detected by a separate sensor (more than 105°C) - water heater outlet tank |
Turn the water heater off and on using the ON/OFF button. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| E 12 |
General overheating. Average temperature of temperature sensors NTC1/NTC2 is 12°C higher than the set temperature - water heater outlet tank |
Turn the water heater off and on using the ON/OFF button. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| E 14 |
Low water heating rate - water heater tank outlet |
Check the power supply voltage. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| E 15 |
Lack of water - water heater tank leaving |
Turn off the water heater using the ON/OFF button. Fill the water heater with water. Check the serviceability of the safety valve. Check for the presence of a water intake tube in the outlet tank. Clean the heating element from limescale and salt deposits. Turn on the water heater using the ON/OFF button. |
| E 20 |
Open or short circuit of temperature sensor NTC1/NTC2 - incoming water heater tank |
Turn off the water heater using the ON/OFF button. Check temperature sensors NTC1/NTC2 for condensation. Check temperature sensors NTC1/NTC2 for open/short circuit. |
| E 21 |
Water overheating detected by a separate sensor (more than 105°C) - incoming water heater tank |
Turn the water heater off and on using the ON/OFF button. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| E 22 |
General overheating. The average temperature of temperature sensors NTC1/NTC2 is 12°C higher than the set temperature - incoming water heater tank |
Turn the water heater off and on using the ON/OFF button. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| E 24 |
Low water heating rate - incoming water heater tank |
Check the power supply voltage. Clean the heating element from limescale and salt deposits. Check the serviceability of temperature sensors NTC1/NTC2. Check that the heating element is working properly. |
| E 25 |
Lack of water - incoming water heater tank |
Turn off the water heater using the ON/OFF button. Fill the water heater with water. Check the serviceability of the safety valve. Check for the presence of a water intake tube in the incoming tank. Clean the heating element from limescale and salt deposits. Turn on the water heater using the ON/OFF button. |
| E 70 | Anti-scale function activated |
Turn off the water heater using the ON/OFF button. Clean the heating element from limescale and salt deposits. Turn on the water heater using the ON/OFF button. |
Here is a description of the most common boiler failures and their numbers. In most cases, to restart the machine, you simply need to turn off the power for 30 seconds by unplugging the cord from the outlet or pressing the button located on the case. Sometimes additional steps may be required. If after them the code continues to be displayed, then this is a sure sign of a malfunction and the need for technical inspection.
| E01 | – a malfunction of the control board has occurred. It is necessary to exclude a common system error; to do this, just turn off the boiler for 10 minutes. If the code appears again, inspect the board to see if visible condensation has appeared on it. |
| E10 | – problems with the temperature sensor. It is necessary to ensure the integrity of the wiring and the good condition of the output contacts. If you have a multimeter available, you can use it to test all potential weak points. If the sensor cannot be returned to operation, it is replaced with a new one. |
| E11 | – the temperature exceeded the normal value of 105 degrees. The reasons for this may be scale, a malfunction of the heating element, or a breakdown of the temperature sensor. The heating element must be removed, cleaned of salts and deposits, and then checked using a special tester. You can simply replace it with new elements. |
| E12 | is a designation indicating that the permissible temperature is exceeded by 12 degrees. The reasons and methods for debugging here are the same as in the case of E11. |
| E13 | – problems with the touch differential. The difference in temperature sensor readings is more than 50 degrees. Sensors are tested and new parts are installed if necessary. |
| E14 | – water heating is very slow. The problem may be low voltage in the network, as well as scale formed on the heating element. |
| E15 | – there is no water in the tank. You need to check the valves and pressure in the water supply. If a broken part is found, it is replaced. |
| E20 | – the temperature sensor has shorted or a communication failure has occurred. In this case, you can press the ON/OFF button to restart the device. You also need to check for condensation on the temperature sensors. If a break occurs, the elements are replaced. |
| E21 | - water overheating occurred. The temperature has exceeded the permissible operating level. Here you can also solve the problem by restarting and cleaning the internal parts from salt deposits. If the temperature sensor or heating element is broken, then there is a need to install a working one. |
| E22 | – general system overheating. The solution is a restart and the same sequence of actions as with E21. |
| E23 | – differential error. Solved in the same way as E13. |
Ariston boilers are one of the most common options installed in apartments. These boilers are very reliable, have high efficiency rates and are affordable for most consumers. But even high-quality equipment from well-known companies sooner or later breaks down and needs repair.
In this article we will look at the possible causes of such breakdowns, we will figure out how to correctly identify and understand what exactly has stopped working,
Bane (Thursday, 02 January 2025 19:15)
Hi,
What is error code 20-50°?
Do you know how to fix it?
Best regards