
2.5.2.2
FAULT FINDING FLOWCHART
Start up
CHECK that there is
power available and
that all thermostat are
calling for heat.
Is the burner
illuminated and
showing 3,4 or 5
on the STATUS
display?
Is the STATUS
display
illuminated?
Does the burner
fan start to run?
Is the STATUS
display flashing?
Is there power
at the
electronics
module?
CHECK THE
LOCKOUT CODES
IN SECTION 1.7.2.
CHECK that there is
the right tension on
terminal of the fan
power plug.
CHECK that the fan
power plug is
correctly inserted
and pushed home.
Is the STATUS
display flashing?
CHECK that continuity
between L & N and
that they are not
crossed over.
Does the gas
valve lift and the
burner ignite?
Does the burner
remain ON
without lockout?
Isolate power and check that the electrodes
are clean and undamaged and that the gap
is set according to section 2.5.1. If doubt,
replace the electrode.
Place pressure gauge on test point and
check that the supply pressure is regular.
Check setting of the throttle and offset
adjustment screws.
Replace the gas valve.
Isolate power and
remove the cover of
the electronics module
and check the fuse.
Replace the electronics
module.
Isolate power and check that the
ignition cable is connected to the
electronics module and that the
spark cap is pushed well home on
the ignition electrode.
CHECK THE
LOCKOUT CODES
IN SECTION 1.7.2.
Is the STATUS
display flashing?
ALL OKAY
Is there gas
available?
Place pressure gauge on test point
and check that the supply pressure
is regular.
Check that the gas valve plug is
connected to the valve and is
undamaged.
After 40 sec does
the burner start
to spark?
CHECK THE
LOCKOUT CODES
IN SECTION 1.7.2.
Check that the electrodes are clean
and undamaged and that the gap is
set according to section 2.5.1. If
doubt, replace the electrode
ONLY REPLACE THE SPARK
CAP WITH A GENUINE
SPARE PART, as this cap is
not a stardard one!
CHECK gas train
and gas supplies.
ONLY REPLACE THE GAS VALVE
WITH A GENUINE SPARE PART, as
this valve has been factory pre-set!
NO
YES
YES
NO
NO
NO
NO
YES
YES
NO
YES
YES
YES
YES
YES
NO
NO
YES
NO
NO
YES
NO
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