Stovax PR0741 - Manual (Page 26)

SERvICING INSTRUCTIONS
FAULT FINDING ChARTS
26
IGNITION
FUNCTIONAL
CHECK
1
PILOT
WILL
NOT
LIGHT
Ensure
there
is
no
debris
around
the
pilot
assembly,
e.g.
coal,
soot,
etc
which
could
short
the
spark,
clean
the
area.
Check
for
fluff
in
the
pilot
aeration
hole.
See
diagram
10.
There
is
a
blockage
in
the
system,
check
the
inlet
test
point,
the
mag
seating,
valve
and
pilot
filter
Operate
the
valve.
Is
there
a
spark?
Does
the
pilot
light?
Is
the
control
being
operated
correctly?
Will
the
pilot
light
with
a
match?
Is
the
gas
turned
on
to
the
fire?
Is
the
gas
pressure
correct?
Has
the
system
got
any
air
in
it?
Sy
STEM
O.K
Consult
users
book
and
retry
Check
isolation
tap
and
gas
meter,
retry.
Correct
and
retry.
Purge
the
gas
pipes
and
retry
See
“No
Spark”
Chart
*
Ensure
gap
between
the
electrode
and
thermocouple
is
as
Dia.
8
and
retry.
If
gap
is
O.K
then
first
change
the
ignition
lead
and
retry.
YES
YES
YES YES
YES YES YES
NO
NO
NO NO
NO
NO NO
IGNITION
FUNCTIONAL
CHECK
2
NO
SPARK
Ensure
there
is
no
debris
around
the
pilot
assembly,
e.g.
coal,
soot,
etc
which
could
short
the
spark,
clean
the
area.
Consult
users
instructions,
retry
Is
the
valve
being
operated
correctly?
Reset
the
pilot
burner
Correct
and
retry
Check
for
defective
or
damaged
control
knob
spindle
or
cam
operation.
Check
for
the
correct
location
of
piezo
components.
Correct
and
retry.
Remove
the
electrode
lead
from
the
piezo.
Operate
the
valve.
Does
a
spark
jump
from
the
piezo
to
the
valve
body?
Operate
the
valve
to
light
the
pilot,
does
the
valve
‘click’?
Has
ignition
lead
become
detached
or
is
connection
poor?
Remove
the
electrode
lead
from
electrode
with
insulated
pliers
hold
the
tip
3.5mm
from
the
pilot
pipework,is
there
a
spark
when
the
valve
‘clicks’?
Is
the
electrode
wire
detached
from
the
piezo
valve?
Replace
the
ODA
unit
Replace
the
electrode
lead
and
retry
Replace
the
control
valve
Is
the
gap
between
electrode
and
thermocouple as
in
Dia
7?
NO
NO NO
YES
YES YES
NO YES
YES
YES
*