89
EN
8.3
Possible faults and solutions
8.3.1
Burner
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
Dirty
Clean
Heat request
Lock-out after
20 sec pre-
ventilation
Check the solenoid
valve’s efficiency
Check the flame
sensor’s efficiency
**
There’s a
false flame
signal
Replace
the pump
solenoid valve
Replace the
flame sensor
The motor
starts
Check that
the green
LED is on
Check the
boiler control
unit
Motor
seized
Pump
seized
Replace the
motor capacitor
Replace the control
and command
equipment
Clean the
filter
Replace the
motor
Yes
Yes
No
Check the
boiler control
unit
No
Heater
consent
(within 400 s)
Check that
the green
LED is on
Heater
damaged
Replace the
heater
Check the
pump filter
Remove the
causes of the
parasite flame
Release/replace
the pump
Yes
Yes
Check the pressure loss or the
complete system ( fuel)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
Why is it
broken?
Electrode
discharge
efficiency
Check
the pump
pressure
Nozzle
spray
Combustion
air setting
correct
Combustion
head setting
correct
Does it
recycle?
Adjust the
setting
Adjust the
setting
Replace the
nozzle
No
Check the
main filter
Fix or replace
the electrodes
Check the
electrode spark
Replace the
transformer
Yes
*
*
Replace the
pump joint
Clean the filter
or replace the
pump
Replace the
solenoid valve
Replace the
pump
Check the
pump filter
Check the
pump joint
Check the
solenoid valve
Does the flame
sensor work properly?
No
Fig. 75
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