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 keep the control knob pushed in
at least 10 seconds before letting go.
FLAME FAILURE FUNCTIONAL CHECK 3IGNITION 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
