Ariston Thermo FAST EVO X

Questions and Answers

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Mary FloresAug 5, 2025
What to do if my Ariston Thermo FAST EVO X is showing triple flashing?
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  Shane DiazAug 5, 2025
  If your Ariston Thermo Water Heater shows a triple flashing error (x3), it might be due to several reasons: * No flame detected: In this case, check the static pressure gas, which should be between 17 and 25 mb for natural gas and 28 and 40 GPL. * Insufficient gas pressure: Verify the dynamic pressure gas, ensuring it's between 17 and 25 mb for natural gas and 28 and 40 GPL. * Problem on the safety valve: Examine the safety valve. * Incorrect positioning: Reposition the ignition/ionization electrode to the correct distances. * Batteries issue: Check the batteries.
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William WagnerAug 11, 2025
What to do if my Ariston Thermo FAST EVO X Water Heater is double flashing?
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  Alicia SchultzAug 11, 2025
  If your Ariston Thermo Water Heater displays a double flashing error (x2), here are several potential causes and solutions: * **Temperature sensor issue:** Check the wire connected to the temperature sensor. If necessary, replace the main board. * **Low Pressure:** If the pressure is less than 0.1 bar, increase the pressure. * **High Pressure:** If the pressure is more than 0.1 bar, check the curve of the NTC sensor following the table. * **NTC Issue:** If the NTC is not correct, replace it. * **Wiring Problem:** If the wire is not correct, replace the probe. * **Battery Problem:** Check the batteries.
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Christian FrankAug 17, 2025
Why is my Ariston Thermo FAST EVO X showing quintuple flashing?
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  Michelle AndersonAug 17, 2025
  If you see a quintuple flashing (x5) on your Ariston Thermo Water Heater, it could indicate: * **High Fume Temperature:** Check the dynamic pressure gas, ensuring it is between 17 and 25 mb for natural gas and 28 and 40 GPL. * **Incorrect Gas Valve Setting:** Set the gas valve following the instruction booklet. * **Exhaust Fume Issue:** Have a professional clean the exhaust fume.
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Anthony CarlsonAug 23, 2025
What to do if Ariston Thermo FAST EVO X shows quadruple flashing?
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  William GrayAug 25, 2025
  If your Ariston Thermo Water Heater is showing a quadruple flashing error (x4), consider these possible causes and solutions: * **Gas Valve Problem:** Check the gas valve. * **Valve Not Opening:** Replace the gas safety valve if it doesn't open. * **Incorrect Diaphragm:** Put in place the one of the diaphragm instruction booklet. * **Battery Issues:** Check the batteries.
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Mary ThomasAug 29, 2025
How to fix single flashing on Ariston Thermo FAST EVO X?
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  michael75Aug 29, 2025
  If your Ariston Thermo Water Heater is showing a single flash (x1), it could be due to the micro-switch not being in the correct position. To resolve this, check the position of the micro switch with the instruction booklet.

Summary

GENERAL INFORMATION

DIMENSIONS AND SPECIFICATIONS

Specifies physical dimensions and sizes for the appliance models.

APPLIANCE INTERFACE (HMI)

Details the Human-Machine Interface (HMI) and controls of the appliance.

INTERNAL COMPONENTS OVERVIEW

Provides a comprehensive breakdown of the appliance's internal components.

WALL MOUNTING PREPARATION

Guides on the preparation steps for mounting the appliance on a wall.

HYDRAULIC SYSTEM DIAGRAM

Illustrates the hydraulic system layout and connections of the appliance.

OPERATION LOGIC

FAST EVO X;FLUENDO PLUS LNX OPERATION

Describes the operational logic for the FAST EVO X/FLUENDO PLUS LNX model.

FAST R X;BRD LNX OPERATION

Details the operational logic for the FAST R X/BRD LNX model.

APPLIANCE MANAGEMENT

Covers the management and control aspects of the appliance's operation.

SPECIAL OPERATING FUNCTIONS

Discusses special functions like antifreeze and solar compatibility.

HYDRAULIC COMPONENTS

FAST EVO X;FLUENDO PLUS LNX HYDRAULIC COMPONENTS

Details the hydraulic components specific to the FAST EVO X/FLUENDO PLUS LNX model.

FAST R X;BRD LNX HYDRAULIC COMPONENTS

Outlines the hydraulic components specific to the FAST R X/BRD LNX model.

GAS SYSTEM AND SETTINGS

GAS SYSTEM: FAST EVO X;FLUENDO PLUS LNX

Explains the gas system for the FAST EVO X/FLUENDO PLUS LNX model.

GAS SYSTEM: FAST R X;BRD LNX

Describes the gas system for the FAST R X/BRD LNX model.

GAS SETTING AND ADJUSTMENT

Details the procedures for setting and adjusting the gas parameters.

BURNER, IGNITION & PROBES

Describes the burner, ignition, and ionization probes.

MANIFOLD AND PROBE POSITIONING

Details the gas manifold and probe positioning.

ELECTRICAL WIRING DIAGRAMS

WIRING: FAST EVO X;FLUENDO PLUS LNX

Shows the electrical cable layout for the FAST EVO X/FLUENDO PLUS LNX model.

WIRING: FAST EVO X DISPLAY

Details the electrical wiring for the FAST EVO X DISPLAY model.

WIRING: FAST R X;BRD LNX

Presents the electrical cable diagram for the FAST R X/BRD LNX model.

ERROR CODES AND TROUBLESHOOTING

TROUBLESHOOTING: FAST EVO X;FLUENDO PLUS LNX

Provides troubleshooting steps for the FAST EVO X/FLUENDO PLUS LNX model.

TROUBLESHOOTING: FAST R X;BRD LNX

Offers troubleshooting guidance for the FAST R X/BRD LNX model.

ERROR CODES: FAST EVO X DISPLAY

Details error codes and troubleshooting for the FAST EVO X DISPLAY.

TECHNICAL SPECIFICATIONS

Ariston Thermo FAST EVO X Specifications

General

Fuel Type	Natural Gas/LPG
Ignition	Electronic
Installation	Wall Mounted
Type	Instantaneous Water Heater
Power Supply	220-240V, 50Hz
Water Pressure	0.1-10 bar
Safety Features	Flame Failure Device, Overheat Protection
Maximum Flow Rate	11 liters/min