Ferroli
DOMIproject S24D
System Boiler
24kW
2010-2018
ErP A
90 fault codes
<p>The DOMIproject S24D is a system boiler from Ferroli, available at 24kW output. Produced 2010-2018.</p>
DOMIproject S24D Fault Codes 90
Code
Description
Severity
Type
A01
Ignition Failure / No Flame
The boiler has failed to ignite — no flame was detected after the ignition sequence. This…
Medium
DIY
View Guide
A02
Flame Loss During Operation
The boiler ignited but then lost its flame during normal operation. Common causes include gas pressure…
Medium
DIY
View Guide
A03
Safety Thermostat Lockout
The boiler safety thermostat has triggered due to overheating.
High
Engineer
View Guide
A04
False Ionisation / Flame Detected Without Demand
The boiler's ionisation circuit is detecting a flame when none should be present. A serious safety…
High
Engineer
View Guide
A05
Overheat Lockout
The safety thermostat has detected excessively high temperatures and shut the boiler down.
High
Engineer
View Guide
A06
Overheat Lockout — Secondary
A secondary overheat safety device has activated.
High
Engineer
View Guide
A07
Fan Fault
The fan is not operating at the required speed or has stopped.
High
Engineer
View Guide
A09
Fan Not Responding to Start Command
The fan has not started within the required time after the PCB sent the start signal.
High
Engineer
View Guide
A11
Return NTC Open Circuit
The return temperature sensor circuit is broken.
Medium
Engineer
View Guide
A13
Flow NTC Sensor Fault
The flow temperature sensor has failed or has a wiring fault.
Medium
Engineer
View Guide
A14
Return NTC Sensor Fault
The return temperature sensor has failed or has a wiring fault.
Medium
Engineer
View Guide
A15
DHW Outlet Sensor Fault
The domestic hot water outlet temperature sensor has failed or has a wiring issue.
Medium
Engineer
View Guide
A16
Gas Valve Lockout — Failed to Close
The gas valve has failed to close correctly after the burner should have stopped. Safety-critical.
High
Engineer
View Guide
A19
PCB Fault — Communication Error
An internal communication error has been detected on the PCB.
High
Engineer
View Guide
A20
Condensate Siphon Blocked
The internal condensate siphon is blocked with scale, debris, or ice.
Medium
Engineer
View Guide
A31
Flow/Return Sensor Reversed
The sensors are fitted to the wrong pipes.
Medium
Engineer
View Guide
A61
PCB AGC01 Internal Error
On Ferroli Bluehelix Tech boilers, A61 indicates an internal error in the main PCB (AGC01 controller).
High
Engineer
View Guide
A62
No Communication Between PCB and Gas Valve
On Ferroli boilers, A62 indicates there is no communication between the main PCB and the electronic…
High
Engineer
View Guide
A64
Maximum Consecutive Resets Exceeded
On Ferroli Bluehelix Tech boilers, A64 means the maximum number of consecutive resets has been reached.…
High
Engineer
View Guide
D1
Diverter Valve Fault
The diverter valve (which switches water flow between heating and hot water) appears to not be…
Medium
Engineer
View Guide
F01
Low Water Pressure Warning
A warning (non-lockout) version of the low pressure fault on some Ferroli models. The boiler may…
Low
DIY
View Guide
F03
Low Water Pressure (Warning)
System pressure is approaching the minimum — a warning before lockout occurs.
Low
DIY
View Guide
F05
Air Pressure Switch Error
The air pressure switch is not registering correctly — this switch confirms the fan has reached…
High
Engineer
View Guide
F07
High Flue Gas Temperature
The flue gas probe (exchanger probe) has detected an excessively high temperature for more than 2…
High
Engineer
View Guide
F08
Overtemperature Protection — Flow Sensor
On Ferroli Bluehelix Tech boilers, F08 indicates the overtemperature protection has activated based on the heating…
High
Engineer
View Guide
F09
Overtemperature Protection — Return Sensor
On Ferroli Bluehelix Tech boilers, F09 indicates the overtemperature protection has activated based on the return…
High
Engineer
View Guide
F10
Flue Temperature Too High
The flue gas temperature sensor has detected temperatures above safe limits.
High
Engineer
View Guide
F11
Return Sensor Fault
On Ferroli boilers, F11 indicates the return temperature sensor has a wiring fault (shorted or disconnected)…
Medium
Engineer
View Guide
F12
DHW Sensor Fault
The domestic hot water temperature sensor has a wiring fault (shorted or disconnected) or has failed.…
Medium
Engineer
View Guide
F13
Flue Probe Fault
On Ferroli boilers, F13 indicates the flue gas probe has a wiring fault (shorted or disconnected)…
Medium
Engineer
View Guide
F14
Flow Sensor 2 / Fan Problem Fault
On some Ferroli models, F14 indicates either a secondary delivery sensor fault (DOMIcondens) or a fan…
Medium
Engineer
View Guide
F15
Supply Voltage Low (Modena HE)
On Ferroli Modena HE combi boilers, F15 indicates the supply voltage has dropped below 170V.
Medium
Engineer
View Guide
F22
Low Water Pressure (Pressure Switch)
The pressure switch has detected dangerously low pressure.
Medium
Engineer
View Guide
F26
Gas Valve Relay Fault
The PCB relay controlling the gas valve has failed.
High
Engineer
View Guide
F27
Flame Detected After Shutdown
A flame signal is present after the gas valve should be closed.
High
Engineer
View Guide
F28
Flame Loss (Condensate Related)
Flame loss associated with a blocked or frozen condensate pipe — Ferroli uses F28 specifically for…
Medium
DIY
View Guide
F30
External Thermostat Fault
The external thermostat signal is incorrect.
Medium
Engineer
View Guide
F34
Low Supply Voltage
On Ferroli boilers, F34 indicates the mains supply voltage has dropped below 170V — too low…
Medium
Engineer
View Guide
F35
Incorrect Mains Frequency
On Ferroli boilers, F35 indicates an incorrect or irregular mains power frequency (should be 50Hz in…
Medium
Engineer
View Guide
F37
Low Water Pressure
The system water pressure has dropped below the minimum required level.
Low
DIY
View Guide
F39
External Temperature Probe Fault
The optional external temperature probe (for weather compensation) has a wiring fault or has been disconnected…
Low
Engineer
View Guide
F40
Pressure Sensor Fault
The electronic pressure sensor gives wrong readings.
Medium
Engineer
View Guide
F41
Maximum Delta-T Protection Activated
On Ferroli Bluehelix Tech boilers, F41 indicates the maximum allowable temperature difference between flow and return…
High
Engineer
View Guide
F42
Sensor Control Protection Activated
On Ferroli Bluehelix Tech, F42 indicates the sensor control protection has activated due to heating or…
High
Engineer
View Guide
F43
Heat Exchanger Protection — No Circulation
On Ferroli boilers, F43 indicates the heat exchanger protection has activated due to no water circulation…
High
Engineer
View Guide
F48
DHW Flow Switch Fault
The DHW flow switch is not detecting water flow.
Medium
Engineer
View Guide
F49
Pump Over-Run Fault
The pump did not stop after the burner shut down.
Medium
Engineer
View Guide
F52
Controller Internal Error
On Ferroli Modena HE combi boilers, F52 indicates the controller has an internal error.
High
Engineer
View Guide
F56
Calibration Error / Incomplete Calibration
On Ferroli Bluehelix Tech boilers, F56 indicates the auto-calibration procedure did not complete correctly, or there…
Medium
Engineer
View Guide