Baxi ECO5 BLUE Operating And Installation Instructions page 33

CODE
FAULT
DISPLAYED
E35 Parasite flame (flame
error).
E98 Electronic board
parameters incorrectly
configured
"St"
Defrosting function
flashing enabled. The boiler does
not turn on the burner
and does not meet the
heat demands, or runs at
reduced power.
Flow Defrosting function
temperature enabled. The boiler does
<2°C flashing not turn on the burner and
does not meet the heat
demands.
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).
POSSIBLE REASON
• The electronic board is not
earthed.
• Flame sensing electrode faulty or
incorrectly positioned.
• Electronic board faulty.
• 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.
• Primary circuit frozen
• CH flow NTC probe faulty.
• Electronic board faulty.
• Primary circuit frozen
• CH flow NTC probe faulty.
• Electronic board faulty.
33
SERVICE ACTION
• Check the continuity of the earth connections between
the electronic board (X4 connector) and the power
supply terminal block.
• Check the flame sensing electrode is in good
condition and correctly positioned (see the
POSITIONING THE IGNITION AND FLAME-
SENSING ELECTRODE section).
• 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.
• 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 flow NTC probe (*).
• 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 flow NTC probe (*).
7729106 (02-05/19)