FAULT TABLE
18
BURNER CHARACTERISTICS
Corrective measures
Problems
Condensation in the chimney:
Smell of flue gas:
Insufficient heating:
The burner switches to safety mode after lighting:
Noisy pump:
Not enough hot water:
Pump not running:
Burner fails to light:
The manual reset high limit thermostat is tripped:
Reasons
Chimney is cold and/or not lined
x
1
Boiler T° is set too low
x
x
x
2
Chimney blocked
x
3
Combustion spillage in the chimney:
x
4
Insufficient or no ventilation in the boiler room
x
5
Boiler clogged
x
x
x
6
Burner clogged
x
x
x
x
7
Room thermostat T° set too low
x
8
Pump jammed or faulty
x
x
9
Boiler switch is in the Summer position or is faulty
x
x
x
10
Insufficient water in the system«
x
x
x
x
x
11
Radiator valves closed
x
12
System not vented properly
x
x
x
13
Low gas pressure
x
x
x
14
Gas pipe too small
x
x
x
15
Boiler thermostat/potentiometer faulty
x
x
x
16
The electrical system is not earthed (properly)
x
x
17
System fuses have blown
x
x
x
18
System and/or boiler not vented properly
x
x
x
x
19
Not enough time allowed between large drawoffs
x
20
Drawoff flow too fast
x
21
Room thermostat faulty or not turned on
x
x
22
Faulty Summer/Winter switch
x
x
x
x
23
Main switch is faulty or not turned on
x
x
x
x
24
Faulty NTC sensor
x
x
x
25
Thermal reset high limit thermostat (95°C) activated
x
26
Manual reset high limit thermostat (103°C) activated
x
27
Faulty printed circuit board
x
28
P.c.b. fuse blown
x
29
Faulty burner fan
x
30
No PWM signal
x
31
Ignition electrode faulty or incorrectly set
x
32
Ionisation electrode faulty or incorrectly set
x
33
Burner connectors not inserted properly
x
34
Blocked gas valve
x
35
Faulty p.c.b. relay
x
36
Boiler thermostat/potentiometer faulty
x
37
Top of boiler not vented properly
x
38
NTC sensor incorrectly inserted in its pocket
x
39
