Ferroli SIGMA Installation And Servicing Instructions page 31

a
g
i a
m a ai i
a i i
i i g
a ia i i
Sigma
During the ignition phase, there is no spark to the electrode
Check the boiler is connected to the mains and is effi ciently earthed
Check the safety thermostat
Check the electrode is
p
from corrosion de osits
p
Control thermostat set too lo
Check the electric s
pp
u
Check the electronic control
Check the li e ne tral
w
u
v -
nsu cient gas suppl
Check as ress re to main b
g p
u
oiler dirt
Check and clean heat e
x
urner or in ector dirt
Check and clean b rner or in
u
ault o te perature sensor
e lace o tem erat
R p fl w p
u
ncorrect gas pressure
Check for correct as cons
g
oiler dirt
Check and clean heat e
x
oiler inade uate
Check that the boiler is correctly si
central heatin system
g
her ostat set too lo
A d st thermostat to a hi
u
j
ncorrect gas rate
Check that as cons m
g p
u
ault a e ad ust ent
Check that the b rner
fl
u
and that as cons m tion is correct for the boiler o
g p
u
urner air ports locked
Clear air orts
p
ault o te perature sensor
e lace o tem erat
R p fl w p
u
oo ther ostat set too lo or ault
A d st knob to a hi her tem
g
u
j
u p is stuck and ails to rotate
ree the m by remo
p p
F
u
a scre dri er
w
v
he pu p does not rotate
e lace the condenser or
R p
ositioned correctly and free
w
ly
nit
u
ires are not re ersed
v
rner
u
chan er
g
ector
j
re sensor
m tion
p
u
chan er
g
ed for the re
z
her tem erat re ( more than 50° C )
g p
u
tion is correct and ad
u
j
ame is ad sted correctly
u
j
re sensor
erat re and if necessary re
p
u
in the to and rotatin
g p
v
m after checkin
p p g
u
irements of the
q
u
st ress re if necessary
p
u
t t
p
u u
lace stat
p
the shaft ith
g w
electricity s ly
pp
u
31