Technical data
FAULT FINDING CHART Part 2
Replace control PCB because
orange LED is deffective
Replace driver PCB
Replace control or driver PCB
No
No
No
Check flow in the boiler
primary circuit
Does overheat contact
close ?
Do the gas solenoïds
energize ?
Yes
Replace control PCB
No
Yes
The heating outlet pipe
temperature rise
Does the orange LED
light ?
Yes
Yes
Does the orange LED
light ?
No
No
Yes
Yes
Does the burner light
for more than
8 sec. ?
Check if an overheat occur or
replace overheat sensor
Press the RESET button
Replace gas solenoïd
assembly
No
Is there a gas pressure
at manifold ?
Yes
Replace electrode assembly
No
Ok
Check the ionization
electrode
Replace driver PCB
Wait until the return pipe
become hot then rotate
the heating control knob
anticlockwise to minimum
The boiler is OK
9