Stovax Riva Nemos 8627 MA - Manual (Page 20)

20
SERVICING INSTRUCTIONS
FAULT FINDING CHARTS
PILOT
WILL
NOT
STAY
LIT
OR
FIRE
GOES
OUT
IN
USE
Ensure
there
is
no
debris
around
the
pilot
assembly,
(e.g.
soot
etc.)
Check
for
fluff
in
the
pilot
aeration
hole.
See
diagram
5
in
Replacing
Parts,
section
2.3.
Problem
is
with
the
pipe
work
or
fittings
which
lead
to
the
fire.
Correct
and
retry.
Is
thermocouple
connection
good
in
back
of
valve?
Replace
ODS
unit.
Will
pilot
stay
alight?
Change
mag
unit.
Is
the
pilot
flame
of
the
correct
length?
See
diagram
5
in
Replacing
Parts,
section
2.3.
Change
the
ODS
unit.
Will
pilot
stay
alight?
With
the
pilot
running
is
the
gas
pressure
as
stated
on
the
databadge?
With
the
fire
running
on
full
is
the
gas
at
the
pressure
stated
on
the
databadge?
Run
for
3
mins,
turn
off,
time
interval
until
mag
unit
shuts
with
a
click.
Is
this
greater
than
7
seconds?
Run
for
3
mins,
turn
off,
time
interval
until
mag
unit
shuts
with
a
click.
Is
this
greater
than
7
seconds?
Tighten
the
connection
and
retry.
No
No No
No
No
No
Yes
SYSTEM
OK
Yes
Yes
Yes
Yes
No
Yes
Yes No Light
the
pilot
and
kee
p
the
control
knob
pushed
in
at
least
10
seconds
before
letting
go.
FLAME
FAILURE
FUNCTI
ONAL
CHECK
3
IGNITION
FUNCTIONAL
CHECK
2
NO
SPARK
Ensure
there
is
no
debris
around
the
pilot
assembly,
(e.g.
soot
etc.)
which
could
short
the
spark,
clean
the
area.
Consult
the
users
instructions,
retry.
From
Ignition
Fault
Finding
Chart
1
Is
the
gap
between
electrode
and
thermocouple
4.0mm?
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
pipe
work,
is
there
a
spark
when
the
valve
‘clicks’?
Is
the
electrode
wire
detachable
from
the
piezo
in
the
valve?
Replace
the
lead,
retry.
Correct
and
retry.
Check
for
defective
or
damaged
control
knob
spindle
or
cam
operation.
Check
for
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?
Is
the
valve
being
operated
correctly?
Reset
the
electrode
gap,
retry.
Yes
Yes Yes No No No
Yes
Yes
Yes
No
No
Replace
the
pilot
unit.
Replace
the
electrode
lead
and
retry.
Yes