6
FAULT-FINDING CHART
NO IGNITION
CRACKLING
IGNITION
SMELL OF GAS
MELL OF
UNBURNT GAS
AND BAD BUR-
NER COMBU-
STION
5 CONDENSATION
IN THE BOILER
6 COLD RA-
DIATORS IN
WINTER
FAULT
CAUSE
REMEDY
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
figure set on the adjustment thermostat
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. Irregular flame
B. Insufficient or wrongly adjusted
gas delivery
A. Call technical service
B. Call technical service
A. Leak in pipes circuit (inside and
outside boiler)
A. Check the external pipes
Check the internal pipes
Call technical service
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. 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. Flue cross-section or height not
suitable (excessive size)
B. Boiler operating at low temperature
A. Replace unsuitable components.
B. Adjust boiler thermostat at a higher
temperature and check if air intake
pipe/flue exhaust connection is
correct.
A. Function selector on summer position
B. Room thermostat set too low or faulty
C. System or radiators closed
D. Circulator blocked
A. Place it in winter position
B. Adjust thermostat at a higher
temperature or replace it.
C. Check if system gate valves and
radiator cocks are opened.
If item C has been checked with
negative result call technical service
D. Unblock with a screwdriver and
check electrical supply
