Conventional Flue Instructions

27
Fault Finding Charts
Servicing Instructions
FLAME FAILURE FUNCTIONAL CHECK 3
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 the Diagram in the Replacing Parts section.
Problem is with the
pipe work or
fittings which lead
to the appliance.
Correct
and retry.
Is thermocouple
connection good
in back of valve?
Replace
thermocouple.
Will pilot
stay alight?
Change mag
unit.
Small & Midi only:
Is the pilot flame of
the correct length?
See Servicing
Requirements
Diagram 1.
Medium only:
Is the pilot flame of
the correct length? Is
the thermocouple in its
correct position in the
pilot bracket? See
Replacing Parts,
Section 8.
Change the
pilot unit.
Will pilot
stay alight?
With the pilot
running is the gas
pressure as stated on
the data badge?
With the appliance
running on full is the
gas at
the pressure stated
on the data badge?
Run for no more
than 60 seconds
turn off, time interval
until mag unit shuts
with a click. Is this
greater than 7
seconds?
Run for a maximum of
60 seconds, 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 releasing.
Is the flue working?
Rectify flue
No
Yes
Yes
IGNITION FUNCTIONAL CHECK 2
Remove the electrode lead
from the piezo. Operate the
valve. Does a spark jump from
the piezo to the valve body?
Replace the piezo
and gas valve and retry.
Yes
No
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.
Operate the valve to light
the pilot, does the valve
'click'?
Medium only:
Is the gap between
electrode and burner tab
4.0mm?
Has ignition lead
become detached or is
connection poor?
Remove the ignition lead
from electrode with insulated
pliers. Hold the tip 4mm from the
pilot pipework, is there a spark
when the valve ‘clicks’?
Is the ignition lead
detached from the piezo
in the valve?
Replace the combined
lead and piezo, 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.
Is the control system being
operated correctly?
Check the tab on the pilot
burner is not damaged.
Either repair the tab or
replace the pilot burner
and retry.
Yes
Yes
Yes
No
No
No
Yes
Yes
Yes
No
No
Replace the electrode.
Replace the ignition
lead and retry.
Small & Midi only:
Is the pilot burner
horizontal? See
Servicing Requirements
Diagram 1.
Reset the pilot burner.
No