Service manual

if durin
g
o
p
eration the ionisation
durin
g
o
p
eration, the 2 too man
y
check flame stabilit
y
dis
p
la
y
readin
g
can
g
ive
fails, the
g
as valve shuts off, and boiler ma
y
not have flashin
g
restarts indication of flame function
restart is made. If this failure ionisation interru
p
tion durin
g
causes a third restart within one o
p
eration check ionisation clean ionisation
p
robe with
burner demand, the boiler runs current on low load fine sand
p
a
p
e
r
into lock-out.
(
3-13 microAm
p
DC
)
re-adjust gas/air mixture,
check
g
as valve function
check ionisation re
p
air shorted wirin
g
of
wirin
g
ionisation
p
robe to earth
blocked condensation clean si
p
hon and condensate
dischar
g
e tra
y
dischar
g
e
check gas valve coil replace gas valve
resistance on the two
outermost terminals
(
R = about 4,1 kOhm
)
return sensor o
p
en 2 return check return senso
r
use view o
p
tion in
circuit continuous senso
r
function menu mode
test sensor re
p
lace sensor
broken return sensor, or wirin
g
(
R=12 kOhm@25°C
)
p
roblem
return sensor short 2. return check return senso
r
use view o
p
tion in
circuit continuous senso
r
function menu mode
test sensor re
p
lace sensor
(
R=12 kOhm@25°C
)
Trouble shooting manual EN E000129004