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FAULT-FINDING CHART
FAULT
A. Gas cock closed
1 NO IGNITION
B. "Off" button locked
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
A. Irregular flame
2 CRACKLING
B. Insufficient or wrongly adjusted gas
IGNITION
A. Leak in pipes circuit (inside and
3 SMELL OF
GAS
A. Flue section or height with joint not
4 SMELL OF
UNBURNT
B. Excessive gas consumption -
GAS
AND BAD
C. Flames tend to move away
BURNER
D. Flames have yellow tips
COMBUSTION
A. Flue section or height not suitable
5 CONDENSATION
IN THE
B. Boiler operating at low temperature
BOILER
A. Summer-winter switch in summer
6 COLD
RADIATORS
B. Room thermostat adjusted too low or
IN WINTER
C. System or radiators closed
D. Circulating pump blocked
E. 3-way valve faulty
A. Priority thermostat temperature set too
7 POOR HOT
WATER
B. 3-way valve faulty
SUPPLY
CAUSE
than figure set on the regulation
hermostat
delivery
outside boiler)
suitable for the boiler
combustion state is imperfect
(excessive size)
position
faulty
low
REMEDY
A. Open gas cock
B. Reset by pressing
C. Neutral and phase inverted
D. Call technical service
E. Repeat ignition
F. Press reset button
G. Adjust boiler pressure and check
circulating pump
H. Adjust thermostat setting on desired
temperature.
A. Call technical service
B. Call technical service
A. Check for possible leaks in the external
and external pipes.
Call technical service
A. Replace unsuitable components.
B. Adjust gas delivery on the modulating device.
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 tempera-
ture 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
E. Check electricity sypply
A. Adjust priority thermostat at a higher
temperature or replace it
B. Check for correct power supply and
correct positioning of valve body
27
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