33
INSTALLER Section (en)
7729106 (02-05/19)
CODE
DISPLAYED
FAULT POSSIBLE REASON SERVICE ACTION
E35 Parasite ame (ame
error).
• The electronic board is not
earthed.
• Flame sensing electrode faulty or
incorrectly positioned.
• Electronic board faulty.
• Check the continuity of the earth connections between
the electronic board (X4 connector) and the power
supply terminal block.
• Check the ame sensing electrode is in good
condition and correctly positioned (see the
POSITIONING THE IGNITION AND FLAME-
SENSING ELECTRODE section).
E98 Electronic board
parameters incorrectly
congured
• The electronic board has been
replaced and not yet calibrated
for the boiler model.
• Parameters F03 and F12 have
not been set or have been
incorrectly set.
• Set parameters F03 and F12 with the values indicated
in the table in the SETTING PARAMETERS section
according to the boiler model indicated on the rating
plate.
“St”
ashing
Defrosting function
enabled. The boiler does
not turn on the burner
and does not meet the
heat demands, or runs at
reduced power.
• Primary circuit frozen
• CH ow NTC probe faulty.
• Electronic board faulty.
• Defrost the boiler making sure that the appliance is not
supplied with power. Next, start up the burner (the “St”
code disappears after the burner has been running for
a few minutes).
• Check the CH ow NTC probe (*).
Flow
temperature
<2°C ashing
Defrosting function
enabled. The boiler does
not turn on the burner and
does not meet the heat
demands.
• Primary circuit frozen
• CH ow NTC probe faulty.
• Electronic board faulty.
• Defrost the boiler making sure that the appliance is not
supplied with power. Next, start up the burner (the “St”
code disappears after the burner has been running for
a few minutes).
• Check the CH ow NTC probe (*).
CH = central heating
DHW = domestic hot water
(*) DHW NTC and CH delivery probe: cold resistance value: approximately 10 kΩ @ 25° C (resistance decreases as temperature rises).
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