Manu_ENG_UFO_ rev. 0_04_2012
pag. 22
Trouble shooting
TROUBLE
POSSIBLE CAUSE
SOLUTION
A the heater turns on,
A1 Phase and Neutral with wrong
A1 Check Phase / Neutral polarity
the ignition electrode
connection
and eart connection
continues to sparkle
A2 The flame detection electrode is too far
A2 Verify that the flame detection electrode is
then goes to block
from radiant superface
approx. 4 mm from the radiant surface
A3 The control unit is defective
A3 Replace the control unit
B the heater turns on partially
B1 Insufficient gas flow
B1 Check that gas supply has sufficient flow rate
compared to gas consumption of the heater
B2 Inlet gas pressure of the burner is too low B2 Check that the gas pressure corresponds
to that shown on the plate label
B3 Dirty nozzle
B3 Clean nozzle with compressed air
(NO mechanical device)
C the burner does flash-back
C1 Inlet gas pressure of the burner is too high C1 Check that the gas pressure corresponds
to that shown on the plate label
C2 Burner or ceramic plates are dirty
C2 After burner is cold, blow air at low pressure
on the ceramic plates surface, from inside
C3 Ceramic plates are cracked
C3 Replace the ceramic plates
D the heater doesn't turn
D1 Interruption in the elctric plant
D1 Verify voltage at connector of power suppy
because no gas is getting
D2 No tension
D2 Replace the control unit
D3 Solenoid valve is live, but coils
D3 Replace the gas valve
are not energized
E the ignition electrode doesn't
E1 The electrode doesn't spark because
E1 Adjust distance (closer or further) between
sparkle, and burner goes to block
of wrong distance between its tip and earth
tip of ignition electrode and mass :
should be 3 ÷ 4 mm
E2 Power interruption
E2 Check contacts connection of electrodes
and control unit
E3 The spark of the ignition electrode starts
E3 Replace the whole ignition and detection devic
close to the ceramic protection, due to
or just the cable, or just the electrode
its breakcage, or between cable and mass
F the gas valve turns on, but
F1 Air in the gas pipe
F1 Repeat the ignition cycle several times,
the heater doesn't turn and
waiting a time of approx. 20 sec
goes to block
between an ignition and the other
F2 No gas
F2 Verify that all devices of fuel interception,
on gas pipeline, do not prevent passage
It is advisable to communicate us the serial number of the appliance(s) (label with bars code) for
all operation of regular or extraordinary maintenance, and for orders of spare-parts.
On the structure tube
Outside, on packing box
