5.9.9
5.9.9
Flame monitoring fault (=lockout)
Flame monitoring fault (=lockout)
CONDITION
POSSIBLE CAUSE
ACTION
Burner motor starts, flame
establishes, and then a
lockout
1.
Incorrect
position
of
flame detector
2.
Flame
detector
is
unclean
3.
The flame is too weak
(not bright enough)
4.
Faulty
flame
detector
(due to damage or age)
5.
Faulty control unit
6.
Incorrect
flame
signal
due to extraneous light
1.
Fix position
2.
Clean the flame detector
3.
Check
burner
adjust-
ments
4.
Change the flame de-
tector
5.
Change control unit
6.
Prevent extraneous light
from reaching the flame
detector
Lockout during pre-purge
1.
Faulty flame detector
2.
Faulty control unit
3.
Incorrect
flame
signal
due to extraneous light
1.
Change the flame de-
tector
2.
Change control unit
3.
Prevent extraneous light
from reaching the flame
detector
Lockout during shutdown
Symbol
◄
1.
Faulty
flame
detector
(due to damage or age)
2.
Faulty control unit
3.
Incorrect
flame
signal
due to extraneous light
4.
Oil or carbon deposits
burn in combustion head
5.
Valves don not close
1.
Change the flame de-
tector
2.
Change control unit
3.
Prevent extraneous light
from reaching the flame
detector
4.
See section
”
Combustion
head
”
5.
Clean, repair or replace
5.9.10
5.9.10
Damage in burner head
Damage in burner head
CONDITION
POSSIBLE CAUSE
ACTION
Diffuser disc burned-out
Change diffuser disc
Burner head extension
damaged
Change burner head
extension
Inside of the burner head is
oily or has heavy carbon
deposits
1.
Distance
between
dif-
fuser disc and nozzle in-
correct
2.
Combustion air settings
are not correct
3.
Not enough supply air
for constant combustion
4.
Nozzle incorrectly sized
or of wrong type
5.
Nozzle is worn
1.
Correct the adjustments
2.
Correct the adjustments
3.
Enhance air supply
4.
Replace with an appro-
priate nozzle type of
correct size
5.
Change the nozzle
68 (77)
RPMARINES 30820641GB
5. Maintenance