FAULT-FINDING CHART
FAULT
1 NO IGNITION
2 CRACKLING
IGNITION
3 SMELL OF GAS
4 SMELL OF
UNBURNT GAS
AND BAD
BURNER
COMBUSTION
5 CONDENSATION
IN THE BOILER
6 COLD
RADIATORS IN
WINTER
CAUSE
A. Gas cock closed
B. Boiler locked out
C. No flame detection
D. No ignition spark
E. Air inside pipes
F. Safety thermostat intervention
G. Water not circulating
H. Boiler water temperature higher than fi-
gure set on the adjustment thermostat
A. rregular flame
B. Insufficient or wrongly adjusted gas
delivery
A. Leak in pipes circuit (inside and outside
boiler)
A. Flue cross-section or height with joint not
suitable for the boiler
B. Excessive gas consumption - combustion
is imperfect
C. Flames tend to detach
D. Flames have yellow tips
A. Flue cross-section or height not
suitable (excessive size)
B. Boiler operating at low temperature
A. Function selector on summer position
B. Room thermostat set too low or faulty
C. System or radiators closed
D. Circulator blocked
REMEDY
A. Open gas cock
B. Reset by pressing
C. Neutral and phase inverted
D. Call technical service
E. Repeat ignition
F. Press reset push-button
G. Adjust boiler pressure and check
circulator
H. Adjust thermostat setting on desired
temperature.
A. Call technical service
B. Call technical service
A. Check the external pipes
Check the internal pipes
Call technical service
A. Replace unsuitable components
B. Adjust gas delivery
C. Check/adjust gas valve
pressure stabilizer
D. Check that air volutes and Venturi
cones of the burner are clean
If items A-B-C-D have been checked with
negative result call technical service
A. Replace unsuitable components.
B. Adjust boiler thermostat at a higher
temperature and check if air intake
pipe/flue exhaust connection is correct.
A. Place it in winter position
B. Adjust thermostat at a higher tempe-
rature or replace it.
C. Check if system gate valves and
radiator cocks are opened.
If item C has been checked with nega-
tive result call technical service
D. Unblock with a screwdriver and check
electrical supply
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