48
CAUSE
FAULT
FAULT-FINDING CHART
1
NO IGNITION
A
Gas cock closed
B
Lock-out button in lock-out position
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 regulation
thermostat
2
CRACKLING IGNITION
A
Irregular flame
B
Insufficient or wrongly adjusted gas delivery
3
SMELL OF GAS
A
Leak in pipes circuit (inside and outside boiler)
4
SMELL OF UNBURNT GAS AND
A
. Flue section or height with joint not suitable for the boiler
BAD COMBUSTION OF THE BURNER
B
Excessive gas consumption - combustion state is imperfect
C
Flames tend to move away or have yellow tips
5
CONDENSATION IN THE BOILER
A
Flue section or height not suitable (excessive size)
B
Boiler operating at low temperature
6
COLD RADIATORS IN WINTER
A
Summer-winter switch on summer position
B
Low adjusted or defective room thermostat
C
System or radiators closed
D
Circulating pump blocked
E
Lack of water warning light on
7
POOR HOT WATER SUPPLY
A
Low adjusted hot water temperature
