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MAINTENANCE INSTRUCTIONS
6.9
Function codes
6.9.1 Function codes
Code
Function
Description
F07
Flue test function
active
(Chimney-Sweeper)
’ button for 7 seconds the Flue test function is enabled. Pressing the
Pressing ‘
boiler Off button the function is disabled.
The Flue test function operates the boiler at the maximum heating pressure for 15
minutes without any modulation. The function is useful for combustion testing.
F08
Frost Protection
function
(Central heating
circuit)
The function is automatically enabled when the heating sensor detects a
temperature of 5 °C. The boiler operates at minimum gas pressure with the diverter
valve in the ‘winter’ position. The function is disabled when the temperature
detected by the sensor reaches 30°C.
F09
Frost Protection
function
(D.H.W circuit)
(RS version only with connection to a
remote storage
cylinder)
The function is automatically enabled when the D.H.W sensor detects a
temperature of 4 °C. The boiler operates at minimum gas pressure with the diverter
valve in the ‘summer’ position. The function is disabled when the temperature
detected by the sensor is 8 °C in the D.H.W circuit or 30 °C in the central heating
circuit.
F28
Legionella
Prevention Function
Function active for storage boilers only. It comes into operation every 7 days.
It brings the hot water temperature of the storage cylinder up to 60°C whatever
temperature value is set for hot water.
System purging
function
The function is automatically enabled at the first ignition of the boiler. The boiler
operates a series of cycles for a period of 5 minutes. Each cycle consists in: the
pump is enabled for 40 seconds and then disabled for 20 seconds. The starting of
the boiler is only allowed at the end of this function.
In case of an open contact of the water pressure switch, this function can be
enabled during the normal boiler operation. Once the contact is closed a purging
cycle of 2 minutes is performed.
F33
RK 100 - RAD - ING - MAN.INST - 1311.1 - DIGITECH CS MIAH4
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