Chaffoteaux
Mira System FF
System Boiler
20kW
2005-2012
ErP B
23 fault codes
<p>The Mira System FF is a system boiler from Chaffoteaux, available at 20kW output. Produced 2005-2012.</p>
Mira System FF Fault Codes 23
Code
Description
Severity
Type
101
Overheat Protection
The safety thermostat has activated. The boiler exceeded its maximum safe temperature.
High
Engineer
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103
Poor Circulation / Flow Fault
The boiler is detecting poor water circulation. The temperature rise is too rapid.
Medium
Engineer
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110
Flow Temperature Sensor Fault
The flow NTC sensor has developed a fault or open circuit.
Medium
Engineer
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15
Overheat Sensor Open (LED code)
On older Britony models using LED fault codes: the overheat sensor switch is open.
High
Engineer
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30
Overheating Without Lockout (LED code)
The boiler is approaching overheat but has not yet locked out.
High
Engineer
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301
Flue/Combustion Fault
A fault has been detected with the flue gas path or combustion quality.
High
Engineer
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40
No Flame Detection (LED code)
The ionisation electrode is not detecting a flame.
High
Engineer
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50
Ionisation PCB Fault (LED code)
The ionisation circuit on the PCB is faulty.
High
Engineer
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60
Antifrost Mode — Pump Running (LED code)
The boiler is in frost protection mode with the pump running.
Medium
DIY
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70
Antifrost Mode — Burner Running (LED code)
The boiler is in frost protection mode with the burner firing.
Medium
DIY
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80
DHW Thermistor Open Circuit (LED code)
The hot water sensor circuit is broken.
Medium
Engineer
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E01
Ignition Failure (modern models)
No flame detected on Pigma/Calydra Green models.
High
Engineer
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E02
Safety Thermostat (modern models)
Overheat protection on newer Chaffoteaux models.
High
Engineer
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E04
Flow Sensor Fault (modern models)
Flow NTC fault on Pigma/Calydra Green.
Medium
Engineer
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E05
Return Sensor Fault (modern models)
Return NTC fault on newer models.
Medium
Engineer
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