Function
Description
F07
Flue test function
enabled (Chimney-
Sweeper)
Pressing ‘ ’ button for 7 seconds the Flue test function is enabled.
Pressing the 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)
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.
ERROR
CODE
PROBLEM POSSIBLE CAUSE REMEDY RESET
E21
GENERAL PCB
MALFUNCTION
y.
MICROPROCESSOR
MALFUNCTION: IT
DETECTS A WRONG
SIGNAL .
u.
THE PCB RESETS
AUTOMATICALLY THE ERROR.
Automatic
E22
PARAMETER
PROGRAMMING
REQUEST
w.
LOSS OF
MICROPROCESSOR
MEMORY.
w.
REPROGRAM PARAMETERS.
Manual Reset
(Switch off the
power supply)
E35
FLAME DETECTION
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